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Dr. Shannon C. O'Connor, MD

Accepting New Patients

(Dr. Shannon Courtney O'Connor, M.D.)

(No ratings)

Specializes in: Medical Oncology, Adult Oncology and Adult Hematology

St. George's University School of Medicine (2005)

Professional interests include: cancer, blood disorders

6420 Rockledge Drive Suite 4200
Bethesda, MD 20817

(301) 424-6231

Dr. Shannon C. O'Connor, MD is a medical oncologist in Bethesda, MD specializing in medical oncology, adult oncology and adult hematology. She graduated from St. George's University School of Medicine in 2005 and has 21 years of experience. Dr. Shannon C. O'Connor, MD is affiliated with Holy Cross Health and MARYLAND ONCOLOGY HEMATOLOGY PA.

Office Locations

Holy Cross Health

6420 Rockledge Drive Suite 4200
Bethesda, MD 20817

(301) 424-6231

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9707 Medical Center Drive Suite 300
Rockville, MD 20850

(301) 424-6231

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9905 Medical Center Drive Suite 200
Rockville, MD 20850

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Noteworthy Medicare Patient Procedures Performed by Dr. Shannon C. O'Connor, MD in 2023

Click on any procedure below to see further details on volume and pricing among Medicare patients.

Top 5%

By Affordability:

C-reactive protein testing

IgD test

IgM test

quantitative Ig tests

total IgA test

total IgG test

In 2023, Dr. Shannon C. O'Connor, MD had a list price for C-reactive protein testing, IgD test, IgM test, quantitative Ig tests, total IgA test, and total IgG test that was lower than the list prices billed to Medicare by 95% of providers in related specialties within Maryland. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Top 10%

By Affordability:

flow cytometry

In 2023, Dr. Shannon C. O'Connor, MD had a list price for flow cytometry that was lower than the list prices billed to Medicare by 90% of providers in related specialties within Maryland. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Top 25%

By Affordability:

CA-125 test

cancer antigen tests

carcinoembryonic antigen test

In 2012, Dr. Shannon C. O'Connor, MD had a list price for CA-125 test, cancer antigen tests, carcinoembryonic antigen (CEA) test, IgA test, IgG test, immunoglobulin tests, and iron tests that was lower than the list prices billed to Medicare by 75% of providers in related specialties within Maryland. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Shannon C. O'Connor, MD treated as a medical oncologist in Bethesda, MD during 2012 were lab tests, hospital care, inpatient care and blood draw.

Volume of procedures performed by Dr. Shannon C. O'Connor, MD for Medicare patients.

blood draw	233
doctor visit	375
hospital care	305
inpatient care	305
lab tests	844
minimally invasive procedures	44
preventive care	21

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Shannon C. O'Connor, MD treated as a medical oncologist in Bethesda, MD during 2013 were lab tests, blood draw, minimally invasive procedures and hospital care.

Volume of procedures performed by Dr. Shannon C. O'Connor, MD for Medicare patients.

biological response modifier (BRM) therapy	160
blood draw	640
chemotherapy	160
doctor visit	991
hospital care	248
inpatient care	248
lab tests	2578
minimally invasive procedures	255
port flush	25
preventive care	15

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Shannon C. O'Connor, MD.

**Gender**
Male	174
Female	274

**Ethnicity**
Non-Hispanic White	345
Black	38
Hispanic	21
Asian	33
Other	11
Native American	0

**Age**
From 65 to 74	168
From 75 to 84	156
85 and over	91
Less than 65	33

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2013

Hypertension	70
High Cholesterol	55
Stroke	8
Ischemic Heart Disease	36
Depression	20
Chronic Kidney Disease	42
Asthma	9
Osteoperosis	9
Atrial Fibrilation	16
Heart Failure	22
Chronic Obstructive Pulmonary Disease	12
Diabetes	30
Dementia	12
Cancer	43

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Shannon C. O'Connor, MD treated as a medical oncologist in Bethesda, MD during 2014 were lab tests, blood draw, minimally invasive procedures and hospital care.

Volume of procedures performed by Dr. Shannon C. O'Connor, MD for Medicare patients.

biological response modifier (BRM) therapy	147
blood draw	692
chemotherapy	147
doctor visit	1003
hospital care	162
inpatient care	162
lab tests	2264
minimally invasive procedures	246
port flush	17

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Shannon C. O'Connor, MD.

**Gender**
Male	216
Female	294

**Ethnicity**
Non-Hispanic White	401
Black	45
Hispanic	20
Asian	31
Other	0
Native American	0

**Age**
From 65 to 74	204
From 75 to 84	179
85 and over	94
Less than 65	33

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2014

Hypertension	71
High Cholesterol	58
Stroke	8
Ischemic Heart Disease	34
Depression	21
Chronic Kidney Disease	36
Asthma	9
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	24
Chronic Obstructive Pulmonary Disease	15
Diabetes	32
Dementia	9
Cancer	46

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Shannon C. O'Connor, MD treated as a medical oncologist in Bethesda, MD during 2015 were lab tests, blood draw, minimally invasive procedures and chemotherapy.

Volume of procedures performed by Dr. Shannon C. O'Connor, MD for Medicare patients.

biological response modifier (BRM) therapy	240
blood draw	871
chemotherapy	240
doctor visit	1099
hospital care	163
inpatient care	163
lab tests	2635
minimally invasive procedures	331
port flush	30

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Shannon C. O'Connor, MD.

**Gender**
Male	410
Female	626

**Ethnicity**
Non-Hispanic White	796
Black	100
Hispanic	48
Asian	58
Other	34
Native American	0

**Age**
From 65 to 74	440
From 75 to 84	358
85 and over	172
Less than 65	66

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2015

Hypertension	71
High Cholesterol	59
Stroke	8
Ischemic Heart Disease	36
Depression	23
Chronic Kidney Disease	36
Asthma	10
Osteoperosis	12
Atrial Fibrilation	14
Heart Failure	23
Chronic Obstructive Pulmonary Disease	12
Diabetes	31
Dementia	11
Cancer	49

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Shannon C. O'Connor, MD treated as a medical oncologist in Bethesda, MD during 2016 were lab tests, blood draw, minimally invasive procedures and chemotherapy.

Volume of procedures performed by Dr. Shannon C. O'Connor, MD for Medicare patients.

biological response modifier (BRM) therapy	246
blood draw	899
chemotherapy	246
doctor visit	1231
hospital care	136
inpatient care	136
lab tests	3236
minimally invasive procedures	385
port flush	46
preventive care	13
vaccines	13

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Shannon C. O'Connor, MD.

**Gender**
Male	293
Female	456

**Ethnicity**
Non-Hispanic White	518
Black	138
Hispanic	33
Asian	38
Other	22
Native American	0

**Age**
From 65 to 74	323
From 75 to 84	252
85 and over	121
Less than 65	53

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2016

Hypertension	74
High Cholesterol	57
Stroke	6
Ischemic Heart Disease	46
Depression	19
Chronic Kidney Disease	43
Asthma	18
Osteoperosis	11
Atrial Fibrilation	13
Heart Failure	21
Chronic Obstructive Pulmonary Disease	14
Diabetes	36
Dementia	10
Cancer	42

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Shannon C. O'Connor, MD treated as a medical oncologist in Bethesda, MD during 2017 were lab tests, blood draw, minimally invasive procedures and chemotherapy.

Volume of procedures performed by Dr. Shannon C. O'Connor, MD for Medicare patients.

biological response modifier (BRM) therapy	245
blood draw	955
chemotherapy	245
doctor visit	1286
hormone therapy	69
hospital care	121
inpatient care	121
lab tests	14676
minimally invasive procedures	452
port flush	35
thyroid function tests	45

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Shannon C. O'Connor, MD.

**Gender**
Male	1221
Female	2227

**Ethnicity**
Non-Hispanic White	1808
Black	1231
Hispanic	156
Asian	158
Other	95
Native American	0

**Age**
From 65 to 74	1416
From 75 to 84	1202
85 and over	568
Less than 65	262

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2017

Hypertension	75
High Cholesterol	52
Stroke	6
Ischemic Heart Disease	38
Depression	19
Chronic Kidney Disease	46
Asthma	8
Osteoperosis	12
Atrial Fibrilation	11
Heart Failure	21
Chronic Obstructive Pulmonary Disease	15
Diabetes	39
Dementia	11
Cancer	42

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Shannon C. O'Connor, MD treated as a medical oncologist in Bethesda, MD during 2018 were lab tests, blood draw, minimally invasive procedures and chemotherapy.

Volume of procedures performed by Dr. Shannon C. O'Connor, MD for Medicare patients.

biological response modifier (BRM) therapy	205
blood draw	427
chemotherapy	205
doctor visit	1016
hospital care	132
inpatient care	132
lab tests	8877
minimally invasive procedures	379
port flush	27
thyroid function tests	34

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Shannon C. O'Connor, MD.

**Gender**
Male	871
Female	1608

**Ethnicity**
Non-Hispanic White	1346
Black	826
Hispanic	116
Asian	110
Other	0
Native American	0

**Age**
From 65 to 74	1002
From 75 to 84	899
85 and over	390
Less than 65	188

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2018

Hypertension	75
High Cholesterol	61
Stroke	6
Ischemic Heart Disease	38
Depression	20
Chronic Kidney Disease	46
Asthma	8
Osteoperosis	12
Atrial Fibrilation	11
Heart Failure	21
Chronic Obstructive Pulmonary Disease	14
Diabetes	38
Dementia	12
Cancer	43

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Shannon C. O'Connor, MD treated as a medical oncologist in Bethesda, MD during 2019 were lab tests, minimally invasive procedures, chemotherapy and biological response modifier (BRM) therapy.

Volume of procedures performed by Dr. Shannon C. O'Connor, MD for Medicare patients.

biological response modifier (BRM) therapy	297
cardiac procedures	14
chemotherapy	297
doctor visit	1144
hormone therapy	57
hospital care	165
inpatient care	165
lab tests	2086
minimally invasive procedures	426
port flush	50
ultrasound (sonogram)	14

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Shannon C. O'Connor, MD.

**Gender**
Male	225
Female	399

**Ethnicity**
Non-Hispanic White	459
Black	51
Hispanic	34
Asian	44
Other	36
Native American	0

**Age**
From 65 to 74	251
From 75 to 84	232
85 and over	105
Less than 65	36

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2019

Hypertension	68
High Cholesterol	59
Stroke	7
Ischemic Heart Disease	37
Depression	26
Chronic Kidney Disease	39
Asthma	9
Osteoperosis	14
Atrial Fibrilation	13
Heart Failure	19
Chronic Obstructive Pulmonary Disease	11
Diabetes	32
Dementia	11
Cancer	43

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Shannon C. O'Connor, MD treated as a medical oncologist in Bethesda, MD during 2020 were lab tests, minimally invasive procedures, chemotherapy and biological response modifier (BRM) therapy.

Volume of procedures performed by Dr. Shannon C. O'Connor, MD for Medicare patients.

biological response modifier (BRM) therapy	122
chemotherapy	122
doctor visit	739
hormone therapy	52
hospital care	48
inpatient care	48
lab tests	1595
minimally invasive procedures	181

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Shannon C. O'Connor, MD.

**Gender**
Male	120
Female	308

**Ethnicity**
Non-Hispanic White	303
Black	44
Hispanic	21
Asian	35
Other	25
Native American	0

**Age**
From 65 to 74	198
From 75 to 84	148
85 and over	56
Less than 65	26

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2020

Hypertension	64
High Cholesterol	55
Stroke	6
Ischemic Heart Disease	34
Depression	25
Chronic Kidney Disease	37
Asthma	9
Osteoperosis	13
Atrial Fibrilation	12
Heart Failure	17
Chronic Obstructive Pulmonary Disease	10
Diabetes	30
Dementia	13
Cancer	42

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Shannon C. O'Connor, MD treated as a medical oncologist in Bethesda, MD during 2021 were lab tests, minimally invasive procedures, chemotherapy and biological response modifier (BRM) therapy.

Volume of procedures performed by Dr. Shannon C. O'Connor, MD for Medicare patients.

biological response modifier (BRM) therapy	235
chemotherapy	235
doctor visit	1056
hormone therapy	132
hospital care	167
inpatient care	167
lab tests	2699
minimally invasive procedures	356
port flush	25

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Shannon C. O'Connor, MD.

**Gender**
Male	182
Female	399

**Ethnicity**
Non-Hispanic White	423
Black	65
Hispanic	21
Asian	35
Other	37
Native American	0

**Age**
From 65 to 74	249
From 75 to 84	203
85 and over	89
Less than 65	40

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2021

Hypertension	69
High Cholesterol	62
Stroke	9
Ischemic Heart Disease	40
Depression	25
Chronic Kidney Disease	40
Asthma	9
Osteoperosis	17
Atrial Fibrilation	14
Heart Failure	21
Chronic Obstructive Pulmonary Disease	12
Diabetes	29
Dementia	14
Cancer	48

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Shannon C. O'Connor, MD treated as a medical oncologist in Bethesda, MD during 2022 were lab tests, minimally invasive procedures, chemotherapy and biological response modifier (BRM) therapy.

Volume of procedures performed by Dr. Shannon C. O'Connor, MD for Medicare patients.

biological response modifier (BRM) therapy	209
chemotherapy	209
doctor visit	923
hormone therapy	94
hospital care	81
inpatient care	81
lab tests	2509
minimally invasive procedures	329
port flush	18

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Shannon C. O'Connor, MD.

**Gender**
Male	168
Female	453

**Ethnicity**
Non-Hispanic White	465
Black	58
Hispanic	21
Asian	43
Other	34
Native American	0

**Age**
From 65 to 74	266
From 75 to 84	236
85 and over	90
Less than 65	29

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2022

Hypertension	74
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	25
Depression	21
Chronic Kidney Disease	24
Asthma	11
Osteoperosis	22
Atrial Fibrilation	18
Heart Failure	13
Chronic Obstructive Pulmonary Disease	12
Diabetes	30
Dementia	5
Cancer	56

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Shannon C. O'Connor, MD for Medicare patients.

The highest averages for the top procedures that Dr. Shannon C. O'Connor, MD treated as a medical oncologist in Bethesda, MD were lab tests, blood draw, minimally invasive procedures and chemotherapy.

biological response modifier (BRM) therapy	210
blood draw	673
cardiac procedures	14
chemotherapy	210
doctor visit	987
hormone therapy	80
hospital care	157
inpatient care	157
lab tests	3999
minimally invasive procedures	307
preventive care	16
thyroid function tests	39
ultrasound (sonogram)	14
vaccines	13

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Shannon C. O'Connor, MD.

**Gender**
Male	352
Female	640

**Ethnicity**
Black / African American	236
Asian / Pacific Islander	53
Non-Hispanic White	624
Native American / Alaskan Native	0
Hispanic	44
Other	26

**Age**
75 to 84	351
85 and over	161
Less than 65	69
65 to 74	410

Average of Total of Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Shannon C. O'Connor, MD treated were hypertension, high cholesterol, cancer and chronic kidney disease.

Hypertension	64
High Cholesterol	53
Stroke	6
Ischemic Heart Disease	33
Depression	19
Chronic Kidney Disease	35
Asthma	9
Osteoporosis	12
Heart Failure	18
Chronic Obstructive Pulmonary Disease	11
Diabetes	29
Atrial Fibrillation	12
Dementia	9
Cancer	41

Education & Training

Dr. Shannon C. O'Connor, MD graduated from St. George's University School of Medicine in 2005. She completed residency at Washington Hospital Center. She is certified by the American Board of Internal Medicine and has a state license in Maryland.

Medical School: St. George's University School of Medicine (2005)

Residency: Washington Hospital Center (2008)

Board Certification: American Board of Internal Medicine (2008)

Licensed In: Maryland

Affiliations & Hospitals

Dr. Shannon C. O'Connor, MD is associated with these hospitals and organizations:

Holy Cross Health

MARYLAND ONCOLOGY HEMATOLOGY PA

Ratings & Reviews

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General Payments

These charts describe general payments received by Dr. Shannon C. O'Connor, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Celgene Corporation	$256 Abraxane $87	$169
Myriad Genetic Laboratories, Inc.	$134 PreciseTumor $134
Novocure Inc.	$115 Oncology $115
GlaxoSmithKline, LLC.	$56 JEMPERLI $32	ZEJULA $24
Merck Sharp & Dohme LLC	$48 KEYTRUDA $25	LYNPARZA $23
Other	$176 JAKAFI $28	KRAZATI $24	TUKYSA $24	KISQALI $23	OPDUALAG $15	Other $62

**Types of Payments**
Food and Beverage	$757
Education	$27

Research Payments

Dr. Shannon C. O'Connor, MD has received 23 research payments totaling $100,776.

Biography

Dr. Shannon O'Connor's areas of specialization are adult hematology, adult oncology, and medical oncology; she sees patients in Rockville, MD and Bethesda, MD. She has indicated that her clinical interests include cancer, internal medicine, and blood disorders. Before completing her residency at Washington Hospital Center, Dr. O'Connor attended medical school at St. George's University School of Medicine. Dr. O'Connor is professionally affiliated with Holy Cross Health. According to Holy Cross Health, Dr. O'Connor is currently accepting new patients at her office in Bethesda, MD.

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Dr. Shannon C. O'Connor, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Shannon C. O'Connor, MD in 2023

By Affordability:

By Affordability:

By Affordability:

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD in 2022

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Average Medicare Patient Data From 2012 - 2022

Average of Total of Conditions of Medicare patients treated by Dr. Shannon C. O'Connor, MD From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Research Payments

Biography

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