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Dr. Maureen Donnelly Passaro, MD

Accepting New Patients
(Dr. Maureen D. Passaro, M.D.)
Specializes in: Adult Endocrinology
New York Medical College (1990)
Professional interests include: thyroid cancer, insulin resistance, adrenal insufficiency, and more.
18109 Prince Philip Drive Suite B-200
Olney, MD 20832

Dr. Maureen Donnelly Passaro, MD is an endocrinologist in Olney, MD specializing in adult endocrinology. She graduated from New York Medical College in 1990 and has 36 years of experience. Dr. Maureen Donnelly Passaro, MD is affiliated with MedStar Georgetown University Hospital, MedStar Montgomery Medical Center, MedStar Washington Hospital Center and MedStar Health.

View Doctor's Full Profile (301) 570-7770

Office Locations

MedStar Health

18109 Prince Philip Drive Suite B-200
Olney, MD 20832
(301) 570-7770
1-855-256-6851
open_in_new

Some issues Dr. Maureen Donnelly Passaro, MD can help you with:

Adrenalectomy (Adrenal Surgery)

Adrenalectomy is a surgical procedure to remove the adrenal glands, which lie above each kidney. The adrenal glands are responsible for producing hormones that are necessary for bodily functions, such as the regulation of blood pressure and metabolism. If the adrenal glands overproduce certain hormones, or if a tumor grows on them, removal of the glands is a treatment option.

Adrenal surgery can be open or laparoscopic. Laparoscopic adrenalectomy is a minimally invasive procedure that inserts a thin tube with a camera (laparoscope) through several small incisions on the abdomen. The surgeon uses the laparoscope to guide the procedure and is able to access and remove adrenal glands through the small incisions. Laparoscopic adrenal surgery lasts approximately 1-2 hours.

Laparoscopic adrenalectomy is associated with shorter recovery periods, reduced risk of infection, and smaller scars. Although these factors may be desirable, the location of the tumor, its size, and the severity of the condition may require that an individual instead undergo open surgery. An open adrenalectomy is typically done for larger adrenal tumors and requires a single, large incision on the abdomen. Open adrenal surgery takes around 2-4 hours.

Following the operation, patients will remain in the hospital for 1-2 days for a laparoscopic adrenalectomy or 3-5 days for an open adrenalectomy. Patients will likely have a liquid diet immediately after their surgery, but should be able to return to solid foods after a day. If both of the glands are removed, patients will be given drug therapy to replace the hormones they produced.

Polycystic Ovary Syndrome (PCOS)

Polycystic ovarian syndrome is a common endocrine disorder that causes symptoms such as acne, facial hair, and weight gain. It is often diagnosed when patients experience problems getting pregnant, because PCOS can interfere with ovulation. There is no cure for PCOS, but there are effective treatments that can lessen the severity of the symptoms.

Despite the name, not everyone with polycystic ovarian syndrome develops cysts on their ovaries. It is also possible to have ovarian cysts without having PCOS. The symptoms of polycystic ovarian syndrome are actually related to insulin resistance, a condition where the insulin made by the body is not effectively recognized by the cells. This causes the pancreas to release higher levels of insulin in order to keep blood sugar levels stable, and the excess insulin interferes with hormone production in the pituitary and ovaries, causing the PCOS symptoms.

The symptoms of PCOS include:

  • Weight gain
  • Acne
  • Facial or body hair
  • Thinning head hair
  • Missing or irregular periods
  • Infertility

PCOS is a syndrome, which means that if patients have PCOS, they might not have each and every symptom. Even a few of them might be enough to have physicians check for polycystic ovarian syndrome. A doctor might perform an exam and order blood tests to measure hormone levels.

Treatment for PCOS may include:

  • Insulin sensitizers, which help the body use insulin more effectively, lowering hormone levels. The most commonly used insulin sensitizer is metformin.
  • Weight loss. Being overweight does not cause PCOS, and PCOS can make losing weight difficult. Still, weight loss can improve symptoms for many women.
  • Birth control pills to regulate menstruation and sometimes reduce symptoms such as acne.
  • Fertility medications, especially medications to stimulate ovulation such as clomiphene.
  • Anti-androgen medications, which work to treat symptoms such as acne and facial hair.
  • Low-carb diets, which work similarly to insulin sensitizers to lower hormone levels and help reduce weight.
  • Ovarian drilling or resectioning, surgical procedures sometimes performed if infertility is a persistent problem. These procedures open up the wall of the ovary to temporarily make ovulation more likely.

Polycystic ovarian syndrome is one of the most common endocrine disorders affecting women. Left untreated, it can increase the risk of diabetes, heart disease, and certain cancers. Fortunately there are many good treatment options available.

Thyroid Problems

Thyroid problems are a group of conditions that alter hormone regulation and metabolism. The thyroid is a small, butterfly-shaped gland located in the lower neck, just below the Adam's apple (laryngeal prominence) and larynx (voice box). Despite its small size, the thyroid has an outsized effect on the body by regulating hormones that control metabolism. Metabolism is the body's process of converting consumed food into fuel to power the entire body. Heart rate, weight, cholesterol, body temperature, and even physical growth and development are all affected by the metabolism.

When the thyroid malfunctions, the body is unable to properly process and allocate energy. Thyroid problems, such as hyperthyroidism (overactive thyroid) and hypothyroidism (underactive thyroid), cause irregular metabolism. In some cases, the body produces antibodies that attack the thyroid cells for unknown reasons. The damaged thyroid responds by releasing either too little or too much T3 and T4 thyroid hormones. Thyroid malfunctions may also arise from genetic causes or iodine deficiency. Thyroid problems may include:

  • Hashimoto's thyroiditis, an autoimmune disease that causes hypothyroidism
  • Graves' disease, an autoimmune disease that causes hyperthyroidism
  • Goiter
  • Thyroid nodule
  • Thyroid cancer

Hashimoto's is the leading cause of hypothyroidism, which is when the thyroid does not produce enough hormones to stimulate adequate metabolism. The condition is diagnosed by blood tests that measure TSH (thyroid stimulating hormone) and detect Hashimoto's antibodies. Symptoms of hypothyroidism include sluggish metabolism, inflammation, fatigue, weight gain, brittle hair, dry skin, and sensitivity to cold. To supplement impaired thyroid function, patients with Hashimoto's are typically prescribed synthetic thyroid hormone pills. Such patients may need to consume synthetic thyroids for the rest of their lives. Other treatments may include dietary changes, such as the avoidance of certain foods and medication to reduce inflammation. Frequent blood tests can inform patients if their TSH levels are within a normal range.

Grave's disease is most frequently the cause of hyperthyroidism, which is when the thyroid produces too many hormones, overstimulating one's metabolism. The condition is also diagnosed by blood tests that measure TSH and detect Grave's antibodies. Elevated heart rate, high blood pressure, sweating, bulging eyes, and weight loss are common symptoms of hyperthyroidism. Treatments for hyperthyroidism include oral radioactive iodine, which slowly shrinks the thyroid, slowing the production of excess thyroid hormone. Other anti-thyroid medications such as methimazole (Tapazole) also reduce the production of thyroid hormones. Blood pressure medications known as beta blockers can ease the increased heart rate caused by hyperthyroidism. If treatments are unsuccessful, patients may be prescribed a thyroidectomy, or surgery to remove part or all of the thyroid. Some patients with hyperthyroidism may require ophthalmological (eye medicine) treatments such as eye drops, prednisone, and surgery to reduce eye swelling and bulging.

Untreated thyroid disorders frequently lead to goiters or thyroid nodules. A thyroid goiter is a large lump that can be felt near the base of the neck and is made of swollen thyroid tissue or nodules (excess cell growth). Nodules and goiters are diagnosed by CT scan or ultrasound. Obstructive goiters can cause pain, coughing, and abnormal breathing. The most common cause of goiters is hyperthyroidism (overactive thyroid). However, Hashimoto's is also known to cause goiters or nodules. Goiters develop from continued damage from antibodies to the thyroid over time. At times, a goiter can result from a cancerous thyroid tumor. Most goiters and nodules are themselves benign.

The exact causes of thyroid cancer are unknown. People who develop thyroid cancer may or may not have another thyroid problem such as Hashimoto's or Grave's disease. Symptoms of thyroid cancer include a nodule that can be felt on the neck, hoarseness, difficulty swallowing, swelling in the neck, and neck and throat pain. CT and MRI scans are used to diagnose thyroid cancer. There are four types of thyroid cancer which vary in intensity. Thyroidectomy (thyroid removal surgery) is usually prescribed to treat thyroid cancer.

Thyroid problems are often long-term conditions that require some form of treatment. With regular monitoring and medication, many people with thyroid problems are able to lead active and fulfilling lives.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Maureen Donnelly Passaro, MD treated as an endocrinologist in Olney, MD during 2012 were preventive care and vaccines.

Volume of procedures performed by Dr. Maureen Donnelly Passaro, MD for Medicare patients.

doctor visit 1182
preventive care 63
vaccines 63

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Maureen Donnelly Passaro, MD treated as an endocrinologist in Olney, MD during 2013 were hospital care, inpatient care, preventive care and vaccines.

Volume of procedures performed by Dr. Maureen Donnelly Passaro, MD for Medicare patients.

doctor visit 1247
hospital care 162
inpatient care 162
preventive care 73
vaccines 73

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Maureen Donnelly Passaro, MD.

Gender
Male 208
Female 449
Ethnicity
Non-Hispanic White 536
Black 75
Hispanic 15
Asian 18
Other 0
Native American 0
Age
From 65 to 74 310
From 75 to 84 210
85 and over 96
Less than 65 41

Conditions of Medicare patients treated by Dr. Maureen Donnelly Passaro, MD in 2013

Hypertension 75
High Cholesterol 75
Stroke 6
Ischemic Heart Disease 36
Depression 20
Chronic Kidney Disease 24
Asthma 8
Osteoperosis 13
Atrial Fibrilation 14
Heart Failure 17
Chronic Obstructive Pulmonary Disease 10
Diabetes 68
Dementia 11
Cancer 11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Maureen Donnelly Passaro, MD treated as an endocrinologist in Olney, MD during 2014 were hospital care, inpatient care, preventive care and vaccines.

Volume of procedures performed by Dr. Maureen Donnelly Passaro, MD for Medicare patients.

doctor visit 1102
hospital care 72
inpatient care 72
preventive care 58
vaccines 58

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Maureen Donnelly Passaro, MD.

Gender
Male 178
Female 424
Ethnicity
Non-Hispanic White 493
Black 61
Hispanic 0
Asian 17
Other 16
Native American 0
Age
From 65 to 74 296
From 75 to 84 184
85 and over 90
Less than 65 32

Conditions of Medicare patients treated by Dr. Maureen Donnelly Passaro, MD in 2014

Hypertension 75
High Cholesterol 75
Stroke 7
Ischemic Heart Disease 30
Depression 19
Chronic Kidney Disease 24
Asthma 7
Osteoperosis 14
Atrial Fibrilation 10
Heart Failure 13
Chronic Obstructive Pulmonary Disease 8
Diabetes 66
Dementia 10
Cancer 11

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Maureen Donnelly Passaro, MD treated as an endocrinologist in Olney, MD during 2015 were preventive care and vaccines.

Volume of procedures performed by Dr. Maureen Donnelly Passaro, MD for Medicare patients.

doctor visit 1047
preventive care 81
vaccines 81

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Maureen Donnelly Passaro, MD.

Gender
Male 324
Female 720
Ethnicity
Non-Hispanic White 844
Black 110
Hispanic 0
Asian 40
Other 28
Native American 0
Age
From 65 to 74 526
From 75 to 84 328
85 and over 128
Less than 65 62

Conditions of Medicare patients treated by Dr. Maureen Donnelly Passaro, MD in 2015

Hypertension 75
High Cholesterol 75
Stroke 6
Ischemic Heart Disease 29
Depression 18
Chronic Kidney Disease 28
Asthma 9
Osteoperosis 15
Atrial Fibrilation 11
Heart Failure 12
Chronic Obstructive Pulmonary Disease 9
Diabetes 61
Dementia 8
Cancer 11

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Maureen Donnelly Passaro, MD treated as an endocrinologist in Olney, MD during 2016 were preventive care and vaccines.

Volume of procedures performed by Dr. Maureen Donnelly Passaro, MD for Medicare patients.

doctor visit 1074
preventive care 67
vaccines 67

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Maureen Donnelly Passaro, MD.

Gender
Male 163
Female 402
Ethnicity
Non-Hispanic White 449
Black 58
Hispanic 0
Asian 20
Other 21
Native American 0
Age
From 65 to 74 271
From 75 to 84 190
85 and over 69
Less than 65 35

Conditions of Medicare patients treated by Dr. Maureen Donnelly Passaro, MD in 2016

Hypertension 75
High Cholesterol 74
Stroke 5
Ischemic Heart Disease 31
Depression 18
Chronic Kidney Disease 40
Asthma 13
Osteoperosis 14
Atrial Fibrilation 11
Heart Failure 13
Chronic Obstructive Pulmonary Disease 9
Diabetes 62
Dementia 10
Cancer 10

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Maureen Donnelly Passaro, MD treated as an endocrinologist in Olney, MD during 2017 were preventive care and vaccines.

Volume of procedures performed by Dr. Maureen Donnelly Passaro, MD for Medicare patients.

doctor visit 1085
preventive care 109
vaccines 109

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Maureen Donnelly Passaro, MD.

Gender
Male 156
Female 418
Ethnicity
Non-Hispanic White 460
Black 61
Hispanic 0
Asian 20
Other 19
Native American 0
Age
From 65 to 74 284
From 75 to 84 205
85 and over 57
Less than 65 28

Conditions of Medicare patients treated by Dr. Maureen Donnelly Passaro, MD in 2017

Hypertension 74
High Cholesterol 51
Stroke 5
Ischemic Heart Disease 27
Depression 18
Chronic Kidney Disease 40
Asthma 6
Osteoperosis 14
Atrial Fibrilation 10
Heart Failure 10
Chronic Obstructive Pulmonary Disease 6
Diabetes 62
Dementia 6
Cancer 9

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Maureen Donnelly Passaro, MD treated as an endocrinologist in Olney, MD during 2018 were preventive care and vaccines.

Volume of procedures performed by Dr. Maureen Donnelly Passaro, MD for Medicare patients.

doctor visit 1148
preventive care 80
vaccines 80

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Maureen Donnelly Passaro, MD.

Gender
Male 165
Female 439
Ethnicity
Non-Hispanic White 481
Black 67
Hispanic 0
Asian 20
Other 24
Native American 0
Age
From 65 to 74 290
From 75 to 84 225
85 and over 63
Less than 65 26

Conditions of Medicare patients treated by Dr. Maureen Donnelly Passaro, MD in 2018

Hypertension 75
High Cholesterol 75
Stroke 4
Ischemic Heart Disease 27
Depression 19
Chronic Kidney Disease 41
Asthma 7
Osteoperosis 17
Atrial Fibrilation 9
Heart Failure 10
Chronic Obstructive Pulmonary Disease 8
Diabetes 63
Dementia 8
Cancer 11

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Maureen Donnelly Passaro, MD treated as an endocrinologist in Olney, MD during 2019 were preventive care and vaccines.

Volume of procedures performed by Dr. Maureen Donnelly Passaro, MD for Medicare patients.

doctor visit 1232
preventive care 76
vaccines 76

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Maureen Donnelly Passaro, MD.

Gender
Male 176
Female 444
Ethnicity
Non-Hispanic White 495
Black 64
Hispanic 0
Asian 20
Other 30
Native American 0
Age
From 65 to 74 275
From 75 to 84 248
85 and over 74
Less than 65 23

Conditions of Medicare patients treated by Dr. Maureen Donnelly Passaro, MD in 2019

Hypertension 75
High Cholesterol 75
Stroke 6
Ischemic Heart Disease 30
Depression 19
Chronic Kidney Disease 41
Asthma 9
Osteoperosis 20
Atrial Fibrilation 12
Heart Failure 11
Chronic Obstructive Pulmonary Disease 8
Diabetes 59
Dementia 10
Cancer 11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

Volume of procedures performed by Dr. Maureen Donnelly Passaro, MD for Medicare patients.

doctor visit 1058

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Maureen Donnelly Passaro, MD.

Gender
Male 184
Female 433
Ethnicity
Non-Hispanic White 485
Black 68
Hispanic 0
Asian 20
Other 26
Native American 0
Age
From 65 to 74 275
From 75 to 84 242
85 and over 70
Less than 65 30

Conditions of Medicare patients treated by Dr. Maureen Donnelly Passaro, MD in 2020

Hypertension 75
High Cholesterol 75
Stroke 6
Ischemic Heart Disease 31
Depression 17
Chronic Kidney Disease 40
Asthma 7
Osteoperosis 18
Atrial Fibrilation 13
Heart Failure 10
Chronic Obstructive Pulmonary Disease 7
Diabetes 57
Dementia 11
Cancer 9

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

Volume of procedures performed by Dr. Maureen Donnelly Passaro, MD for Medicare patients.

doctor visit 1266

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Maureen Donnelly Passaro, MD.

Gender
Male 182
Female 476
Ethnicity
Non-Hispanic White 521
Black 57
Hispanic 23
Asian 25
Other 32
Native American 0
Age
From 65 to 74 282
From 75 to 84 275
85 and over 77
Less than 65 24

Conditions of Medicare patients treated by Dr. Maureen Donnelly Passaro, MD in 2021

Hypertension 75
High Cholesterol 75
Stroke 5
Ischemic Heart Disease 32
Depression 16
Chronic Kidney Disease 40
Asthma 7
Osteoperosis 19
Atrial Fibrilation 11
Heart Failure 11
Chronic Obstructive Pulmonary Disease 7
Diabetes 56
Dementia 9
Cancer 11

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

Volume of procedures performed by Dr. Maureen Donnelly Passaro, MD for Medicare patients.

doctor visit 1286

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Maureen Donnelly Passaro, MD.

Gender
Male 202
Female 541
Ethnicity
Non-Hispanic White 578
Black 78
Hispanic 25
Asian 31
Other 31
Native American 0
Age
From 65 to 74 317
From 75 to 84 302
85 and over 94
Less than 65 30

Conditions of Medicare patients treated by Dr. Maureen Donnelly Passaro, MD in 2022

Hypertension 75
High Cholesterol 75
Stroke 8
Ischemic Heart Disease 23
Depression 15
Chronic Kidney Disease 28
Asthma 12
Osteoperosis 25
Atrial Fibrilation 15
Heart Failure 10
Chronic Obstructive Pulmonary Disease 8
Diabetes 56
Dementia 4
Cancer 17

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Maureen Donnelly Passaro, MD for Medicare patients.

The highest averages for the top procedures that Dr. Maureen Donnelly Passaro, MD treated as an endocrinologist in Olney, MD were hospital care, inpatient care, preventive care and vaccines.

doctor visit 1157
hospital care 117
inpatient care 117
preventive care 75
vaccines 75

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Maureen Donnelly Passaro, MD.

Gender
Female 431
Male 176
Ethnicity
Black / African American 63
Asian / Pacific Islander 21
Non-Hispanic White 485
Native American / Alaskan Native 0
Hispanic 5
Other 20
Age
85 and over 74
75 to 84 219
Less than 65 30
65 to 74 284

Average of Total of Conditions of Medicare patients treated by Dr. Maureen Donnelly Passaro, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Maureen Donnelly Passaro, MD treated were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension 68
High Cholesterol 65
Stroke 5
Ischemic Heart Disease 26
Depression 16
Chronic Kidney Disease 31
Asthma 7
Osteoporosis 15
Heart Failure 10
Chronic Obstructive Pulmonary Disease 7
Diabetes 55
Atrial Fibrillation 10
Dementia 7
Cancer 10

Education & Training

Dr. Maureen Donnelly Passaro, MD graduated from New York Medical College in 1990. She completed residency at Stamford Hospital, Connecticut. She is certified by the American Board of Internal Medicine, Internal Medicine and has a state license in Maryland.

Medical School: New York Medical College (1990)

Residency: Stamford Hospital, Connecticut (1993)

Board Certification: American Board of Internal Medicine, Internal Medicine

Licensed In: Maryland

Affiliations & Hospitals

Dr. Maureen Donnelly Passaro, MD is associated with these hospitals and organizations:

MedStar Georgetown University Hospital
MedStar Montgomery Medical Center
MedStar Washington Hospital Center
MedStar Health

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. Maureen Donnelly Passaro, MD appears to accept the following insurance providers: MultiPlan, Optimum Choice, Optima Health, MAMSI, Magellan Health Services, United Healthcare Choice Plus, United Healthcare Choice, First Health PPO, Blue Choice, Great-West Healthcare, TRICARE, Coventry, TRICARE Reserve Select, Anthem, Aetna Managed Choice POS, Beech Street PPO, Aetna HMO, Kaiser Permanente, CIGNA PPO, CIGNA EPO, Aetna Medicare PPO, Aetna Medicare PFFS, CIGNA Indemnity, AmeriHealth, AARP, Medicare Advantage, TriWest, Coventry National Network PPO, Highmark, Amerigroup, United Healthcare, Medicaid, Humana, Cigna, Sentara Health Plans, WellPoint, United Healthcare Community Plan (AmeriChoice), Humana Medicare Advantage PPO, Blue Cross and Blue Shield of Michigan, CIGNA PPO Plus, HealthyBlue PPO, Aetna Premier 200PD, MedStar Family Choice - Maryland Health Choice, CareFirst NASCO, M.D. IPA Preferred (POS), Private Fee-for-Service Plans (PFFS), CareFirst Maryland Indemnity or PPO, IH-PPO, Aetna Advantage 6350PD, DC/MD SHOP QHP Small Business Plans, CareFirst EPO, MedStar Family Choice DC Healthy Families, Optimum Choice Preferred (POS), OCI Direct (HMO), Medicare Direct, Alterwood Advanatge HMO & DSNP Plans, Aetna Open Choice (PPO), OA Plus, CareFirst Administrators, United Student Resources, IH-Network Only Plus, IH-POS, Aetna Classic 5000, Aetna Signature Administrator PPO/TPA, Healthy Blue (HMO, POS), CareFirst Community Health Plan of Maryland, IH-POS Plus, Jai Medical Systems - Maryland Health Choice, CareFirst Maryland Point of Service Plan, Aetna HMO-Open Access/Select OA/HealthFund/Health Network Option OA, Health Services for Children with Special Needs, Choice POS II, CareFirst Blue Card Program, Choice Fund PPO, IH-EPO Plus, Aetna VA Exchange, Aetna Managed Choice Open Access (POS), CareFirst BlueCross BlueShield Advantage Core/Enhanced, Aetna Better Health of Virginia, Aetna Worker's Compensation Network, Options PPO Cardiac Global, Uniformed Services Family Health Plan, Aetna Advantage 5750, IH-Open HMO Option, HumanaChoice Honor's plan PPO, Aetna Basic, CareFirst FEP Blue Focus, Optimum Choice & Optimum Choice Preferred (POS) Cardiac Global, MedStar Family Choice DC Healthcare Alliance, IH-Open POS Plus, Core Essential (HMO), IH-Open EPO Plus, Johns Hopkins Advantage MD PLUS PPO, Select HMO/HealthFund/Health Network, MD IPA (HMO) & MD IPA Preferred Cardiac Global, CareFirst Blue Preferred PPO, Aetna Elect Choice/ Open Access (POS), IH-Open HMO, Aetna Advantage 6350, Erickson Advantage Plans, M.D. IPA (HMO), POS OA, Aetna Elect Choice/ EPO (Aetna Health Fund), Aetna Quality Point of Service (POS), IH-Open POS II, Johns Hopkins Advantage MD HMO, Aetna Classic 5000PD, CareFirst Dual Prime HMO-SNP, Priority Partners - Maryland Health Choice, Aetna Student Health Insurance, Private Health Care Systems (PPO), Choice POS, Lasso Healthcare - Medicare Medical Savings Account, IH-Indemnity, CareFirst MedStar PPO, CareFirst (NCA) Indemnity, Aetna Traditional Choice (PPO), United Medicare Private Fee-for-Service (PFFS) plans, IH-HMO, IH-Open Network Only Plus, HumanaChoice PPO, CareFirst Federal Employee Program (Std. & Basic PPO), Johns Hopkins Advantage MD PPO, Medicare FFS, Maryland Physicians Care MCO, Veterans Affairs Community Care Network, Advantra Platinum (PPO), Aetna Better Health of Maryland, BCBS Out-of-State Medicare Plans (Blue Advantage), Employee Health Plan, Choice POS II Open Access, Navigate, Police and Fire Clinic, Network OA, CareFirst MedStar Select PPO and Aetna Classic 3500.

Insurance Accepted by Provider includes:

According to our sources, Dr. Maureen Donnelly Passaro, MD accepts the following insurance providers:

MultiPlan
Optimum Choice
Optima Health
MAMSI
Magellan Health Services
United Healthcare Choice Plus
United Healthcare Choice
First Health PPO
Blue Choice
Great-West Healthcare
TRICARE
Coventry
TRICARE Reserve Select
Anthem
Aetna Managed Choice POS
Beech Street PPO
Aetna HMO
Kaiser Permanente
CIGNA PPO
CIGNA EPO
Aetna Medicare PPO
Aetna Medicare PFFS
CIGNA Indemnity
AmeriHealth
AARP
Medicare Advantage
TriWest
Coventry National Network PPO
Highmark
Amerigroup
United Healthcare
Medicaid
Humana
Cigna
Sentara Health Plans
WellPoint
United Healthcare Community Plan (AmeriChoice)
Humana Medicare Advantage PPO
Blue Cross and Blue Shield of Michigan
CIGNA PPO Plus
HealthyBlue PPO
Aetna Premier 200PD
MedStar Family Choice - Maryland Health Choice
CareFirst NASCO
M.D. IPA Preferred (POS)
Private Fee-for-Service Plans (PFFS)
CareFirst Maryland Indemnity or PPO
IH-PPO
Aetna Advantage 6350PD
DC/MD SHOP QHP Small Business Plans
CareFirst EPO
MedStar Family Choice DC Healthy Families
Optimum Choice Preferred (POS)
OCI Direct (HMO)
Medicare Direct
Alterwood Advanatge HMO & DSNP Plans
Aetna Open Choice (PPO)
OA Plus
CareFirst Administrators
United Student Resources
IH-Network Only Plus
IH-POS
Aetna Classic 5000
Aetna Signature Administrator PPO/TPA
Healthy Blue (HMO, POS)
CareFirst Community Health Plan of Maryland
IH-POS Plus
Jai Medical Systems - Maryland Health Choice
CareFirst Maryland Point of Service Plan
Aetna HMO-Open Access/Select OA/HealthFund/Health Network Option OA
Health Services for Children with Special Needs
Choice POS II
CareFirst Blue Card Program
Choice Fund PPO
IH-EPO Plus
Aetna VA Exchange
Aetna Managed Choice Open Access (POS)
CareFirst BlueCross BlueShield Advantage Core/Enhanced
Aetna Better Health of Virginia
Aetna Worker's Compensation Network
Options PPO Cardiac Global
Uniformed Services Family Health Plan
Aetna Advantage 5750
IH-Open HMO Option
HumanaChoice Honor's plan PPO
Aetna Basic
CareFirst FEP Blue Focus
Optimum Choice & Optimum Choice Preferred (POS) Cardiac Global
MedStar Family Choice DC Healthcare Alliance
IH-Open POS Plus
Core Essential (HMO)
IH-Open EPO Plus
Johns Hopkins Advantage MD PLUS PPO
Select HMO/HealthFund/Health Network
MD IPA (HMO) & MD IPA Preferred Cardiac Global
CareFirst Blue Preferred PPO
Aetna Elect Choice/ Open Access (POS)
IH-Open HMO
Aetna Advantage 6350
Erickson Advantage Plans
M.D. IPA (HMO)
POS OA
Aetna Elect Choice/ EPO (Aetna Health Fund)
Aetna Quality Point of Service (POS)
IH-Open POS II
Johns Hopkins Advantage MD HMO
Aetna Classic 5000PD
CareFirst Dual Prime HMO-SNP
Priority Partners - Maryland Health Choice
Aetna Student Health Insurance
Private Health Care Systems (PPO)
Choice POS
Lasso Healthcare - Medicare Medical Savings Account
IH-Indemnity
CareFirst MedStar PPO
CareFirst (NCA) Indemnity
Aetna Traditional Choice (PPO)
United Medicare Private Fee-for-Service (PFFS) plans
IH-HMO
IH-Open Network Only Plus
HumanaChoice PPO
CareFirst Federal Employee Program (Std. & Basic PPO)
Johns Hopkins Advantage MD PPO
Medicare FFS
Maryland Physicians Care MCO
Veterans Affairs Community Care Network
Advantra Platinum (PPO)
Aetna Better Health of Maryland
BCBS Out-of-State Medicare Plans (Blue Advantage)
Employee Health Plan
Choice POS II Open Access
Navigate
Police and Fire Clinic
Network OA
CareFirst MedStar Select PPO
Aetna Classic 3500

Ratings & Reviews

Dr. Maureen Donnelly Passaro, MD has an exceptional overall rating with an average of 4.8 out of 5 stars based on 3161 ratings. We collect ratings and reviews of Dr. Maureen Donnelly Passaro, MD from all over the web to help you find the right in Olney, MD. 

4.8
Overall Rating
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Reviews Left On DocSpot
Overall Rating: 1.0 2018-08-16 
Very unprofessional doctor. Seems very unconcerned with patient symptoms. She goes strictly by lab work only. She doesn't even consider anything other then lab work. Ultra Sounds, ect. I was told I have issue with my thyroid and not knowing if its cancerous or not. Symptoms are much worse then when I first saw this Dr. I tried what she told me and it didn't work. In order for me to take care of others because I am in health care as well I need to take care of myself. God put people on this earth to help not brush people off. I'm not wasting no time but I don't want this to happen to anyone else. Its possible that its cancer and not even know it until it's to late. While this Dr sits in her office with her ARROGANT self passing judgement without even really making sure I could be dying right now. Something that could of be prevented. Now 2018 & we are no further then before. This dr looks at Calcium levels instead actually making sure even if the primary care dr calls with a concern for the patient. She brushes people off and not a good dr. I will make sure everyone knows about her. The only reason she has a good rating is because she was actually the only Endocrinology Dr listed for years and always the first one that pops up in the HOSPITAL LOGS and in the system.  It doesn't matter what I say of think about her but as a professional woman I have NO RESPECT FOR THIS LADY. She gives MEDSTAR A BAD NAME. STAY HUMBLE M PASSARO. Maybe she treats people this way because of the type of insurance they have. PATHETIC!
Reviews From Around The Web
Overall Rating: 5.0 2024-05-23
Patient verified via Press Ganey
Again, Dr. Passaro is an honest, caring, and no bs provider. She will tell you how it is, she is thoughtful and caring. She is thorough to the point where you don't have to question any of her methods. All doctors should take note. Aspire to Dr. Passaro's level of quality and compassion!
Overall Rating: 5.0 2023-10-04
Patient verified via Press Ganey
I was not in a good state of mind when I went for my appointment. I was feeling stressed out about all the symptoms I was having Dr. Passaro put me at ease, told me I was in a safe place, and even gave me a hug. I'm so glad she's my endocrinologist. She's helped me so much.
Overall Rating: 5.0 2023-11-16
Patient verified via Press Ganey
Dr. Passaro asked if she would like to send my name in for a study being performed at MedStar Montgomery and it sounding interesting and I was flattered that she thought I would be a good candidate.
Overall Rating: 5.0 2024-03-28
Patient verified via Press Ganey
Dr. Passaro is one of the best physicians I have ever had the privilege of going to. She is patient, thorough, knowledgeable, and concerned about my health.
Overall Rating: 5.0 2023-11-02
Patient verified via Press Ganey
Dr P is TOP SHELF. She has been amazing since I came to her. I'd refer friends but she is always booked because she is so wonderful.
Overall Rating: 5.0 2025-09-30
Patient verified via Press Ganey
Dr Passaro is very caring. She listens to all my concerns, explains everything regarding my condition. She treats me like a family.
Overall Rating: 5.0 2024-06-14
Patient verified via Press Ganey
Dr Passaro is very thorough with medical ordered, referral to radiology and a specialist, plus what to do if condition worsens.
Overall Rating: 5.0 2024-10-31
Patient verified via Press Ganey
Dr. Passaro is an excellent listener and provides clear directions for the future. She really cares about you as a person.
Overall Rating: 5.0 2023-02-08
Patient verified via Press Ganey
I love my endocrinologist, I'm constantly recommending her! One of the most patient and considerate doctors I've ever had!

To see all 3161 reviews for Dr. Maureen Donnelly Passaro, MD, view their full profile.

General Payments

These charts describe general payments received by Dr. Maureen Donnelly Passaro, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

Payments by Company
Medtronic MiniMed, Inc. $115 Minimed 670G System
$115
Abbott Laboratories $23 FreeStyle Lite system
$23
Novo Nordisk Inc $15
$15
SANOFI-AVENTIS U.S. LLC $15 TOUJEO
$15
Xeris Pharmaceuticals, Inc. $12 RECORLEV
$12
Types of Payments
Food and Beverage $169
Education $12

Biography

Dr. Maureen Passaro practices adult endocrinology in Olney, MD. Patients rated her highly, giving her an average of 5.0 stars (out of 5). Her areas of expertise include the following: gestational diabetes (diabetes during pregnancy), graves disease, and thyroid cancer. Dr. Passaro is professionally affiliated with MedStar Georgetown University Hospital, MedStar Washington Hospital Center, and MedStar Montgomery Medical Center. She accepts Anthem, Blue California, Coventry, and more. Her practice in Olney, MD is open to new patients as reported by Doctor.com. Dr. Passaro graduated from New York Medical College. For her professional training, Dr. Passaro completed residency programs at Stamford Hospital, Connecticut and National Institutes of Health (NIH). Dr. Passaro has received the following distinction: Washington, DC-Baltimore-Northern Virginia Super Doctors.

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