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Dr. Cynthia Joan Herrick, MD, FACP

(10 Ratings)

Specializes in: Adult Endocrinology

Washington University in St. Louis School of Medicine (2006)

Professional interests include: metabolism, tumor, thyroid problems, and more.

1 Village Square Shopping Center Suite: 1
Hazelwood, MO 63042

(314) 362-3500

Dr. Cynthia Joan Herrick, MD, FACP is an endocrinologist in Hazelwood, MO specializing in adult endocrinology. She graduated from Washington University in St. Louis School of Medicine in 2006 and has 20 years of experience. Dr. Cynthia Joan Herrick, MD, FACP is affiliated with WashU Medicine and Barnes-Jewish Hospital.

Office Locations

Barnes-Jewish Hospital

1 Village Square Shopping Center Suite: 1
Hazelwood, MO 63042

(314) 362-3500

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4921 Parkview Place Div Im Endocrinology, Suite 5c
Saint Louis, MO 63110

(314) 362-3500

(314) 230-1119

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4921 Parkview Place Suite: 13a
Saint Louis, MO 63110

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Some issues Dr. Cynthia Joan Herrick, MD, FACP can help you with:

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.

In The News

“Dr. Cynthia Herrick, left, and Dr. Thomas J. Baranski, right, are both co-directors at Washington University Transgender Center at St. Louis Children's Hospital in Missouri.”—"Missouri transgender clinic will NO LONGER use puberty blocker on kids", Daily Mail Online, September 2023

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Cynthia Joan Herrick, MD, FACP treated as an endocrinologist in Hazelwood, MO during 2012 were hospital care and inpatient care.

Volume of procedures performed by Dr. Cynthia Joan Herrick, MD, FACP for Medicare patients.

doctor visit	44
hospital care	49
inpatient care	49

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Cynthia Joan Herrick, MD, FACP treated as an endocrinologist in Hazelwood, MO during 2014 were hospital care, inpatient care, lab tests and diabetes management.

Volume of procedures performed by Dr. Cynthia Joan Herrick, MD, FACP for Medicare patients.

diabetes management	34
doctor visit	16
hospital care	68
inpatient care	68
lab tests	34
preventive care	15

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP.

**Gender**
Male	24
Female	30

**Ethnicity**
Non-Hispanic White	39
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	0
Less than 65	37

Conditions of Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP in 2014

Hypertension	75
High Cholesterol	74
Stroke	0
Ischemic Heart Disease	46
Depression	41
Chronic Kidney Disease	63
Asthma	20
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	44
Chronic Obstructive Pulmonary Disease	24
Diabetes	75
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Cynthia Joan Herrick, MD, FACP treated as an endocrinologist in Hazelwood, MO during 2015 were lab tests, diabetes management, hospital care and inpatient care.

Volume of procedures performed by Dr. Cynthia Joan Herrick, MD, FACP for Medicare patients.

blood draw	40
diabetes management	105
doctor visit	110
hospital care	58
inpatient care	58
lab tests	105
preventive care	48

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP.

**Gender**
Male	96
Female	180

**Ethnicity**
Non-Hispanic White	188
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	96
From 75 to 84	0
85 and over	0
Less than 65	134

Conditions of Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP in 2015

Hypertension	75
High Cholesterol	59
Stroke	8
Ischemic Heart Disease	46
Depression	41
Chronic Kidney Disease	57
Asthma	12
Osteoperosis	10
Atrial Fibrilation	14
Heart Failure	36
Chronic Obstructive Pulmonary Disease	20
Diabetes	62
Dementia	0
Cancer	12

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Cynthia Joan Herrick, MD, FACP treated as an endocrinologist in Hazelwood, MO during 2016 were lab tests, diabetes management, hospital care and inpatient care.

Volume of procedures performed by Dr. Cynthia Joan Herrick, MD, FACP for Medicare patients.

blood draw	52
diabetes management	103
doctor visit	122
hospital care	64
inpatient care	64
lab tests	103
neck imaging	12
preventive care	48
ultrasound (sonogram)	12

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP.

**Gender**
Male	48
Female	104

**Ethnicity**
Non-Hispanic White	107
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	58
From 75 to 84	0
85 and over	0
Less than 65	56

Conditions of Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP in 2016

Hypertension	75
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	43
Depression	38
Chronic Kidney Disease	56
Asthma	23
Osteoperosis	17
Atrial Fibrilation	14
Heart Failure	33
Chronic Obstructive Pulmonary Disease	20
Diabetes	57
Dementia	13
Cancer	14

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Cynthia Joan Herrick, MD, FACP treated as an endocrinologist in Hazelwood, MO during 2017 were lab tests, diabetes management, hospital care and inpatient care.

Volume of procedures performed by Dr. Cynthia Joan Herrick, MD, FACP for Medicare patients.

blood draw	43
diabetes management	133
doctor visit	151
hospital care	86
inpatient care	86
lab tests	133
minimally invasive procedures	20
preventive care	66

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP.

**Gender**
Male	77
Female	132

**Ethnicity**
Non-Hispanic White	144
Black	54
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	75
From 75 to 84	0
85 and over	0
Less than 65	89

Conditions of Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP in 2017

Hypertension	75
High Cholesterol	58
Stroke	9
Ischemic Heart Disease	45
Depression	38
Chronic Kidney Disease	64
Asthma	9
Osteoperosis	16
Atrial Fibrilation	10
Heart Failure	35
Chronic Obstructive Pulmonary Disease	19
Diabetes	58
Dementia	15
Cancer	9

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Cynthia Joan Herrick, MD, FACP treated as an endocrinologist in Hazelwood, MO during 2018 were lab tests, diabetes management, preventive care and hospital care.

Volume of procedures performed by Dr. Cynthia Joan Herrick, MD, FACP for Medicare patients.

blood draw	29
diabetes management	133
doctor visit	128
hospital care	53
inpatient care	53
lab tests	133
minimally invasive procedures	18
preventive care	65

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP.

**Gender**
Male	59
Female	92

**Ethnicity**
Non-Hispanic White	118
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	55
From 75 to 84	0
85 and over	0
Less than 65	61

Conditions of Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP in 2018

Hypertension	70
High Cholesterol	62
Stroke	0
Ischemic Heart Disease	39
Depression	38
Chronic Kidney Disease	56
Asthma	11
Osteoperosis	20
Atrial Fibrilation	9
Heart Failure	29
Chronic Obstructive Pulmonary Disease	14
Diabetes	54
Dementia	10
Cancer	8

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Cynthia Joan Herrick, MD, FACP treated as an endocrinologist in Hazelwood, MO during 2019 were lab tests, diabetes management, preventive care and blood draw.

Volume of procedures performed by Dr. Cynthia Joan Herrick, MD, FACP for Medicare patients.

blood draw	23
diabetes management	132
doctor visit	116
hospital care	20
inpatient care	20
lab tests	132
preventive care	66

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP.

**Gender**
Male	46
Female	97

**Ethnicity**
Non-Hispanic White	111
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	62
From 75 to 84	0
85 and over	0
Less than 65	52

Conditions of Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP in 2019

Hypertension	75
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	38
Depression	36
Chronic Kidney Disease	56
Asthma	10
Osteoperosis	19
Atrial Fibrilation	10
Heart Failure	27
Chronic Obstructive Pulmonary Disease	20
Diabetes	58
Dementia	10
Cancer	9

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Cynthia Joan Herrick, MD, FACP treated as an endocrinologist in Hazelwood, MO during 2020 were lab tests, diabetes management, preventive care and hospital care.

Volume of procedures performed by Dr. Cynthia Joan Herrick, MD, FACP for Medicare patients.

diabetes management	37
doctor visit	62
hospital care	19
inpatient care	19
lab tests	37
preventive care	20

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP.

**Gender**
Male	51
Female	75

**Ethnicity**
Non-Hispanic White	97
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	55
From 75 to 84	0
85 and over	0
Less than 65	51

Conditions of Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP in 2020

Hypertension	73
High Cholesterol	67
Stroke	0
Ischemic Heart Disease	39
Depression	43
Chronic Kidney Disease	54
Asthma	0
Osteoperosis	15
Atrial Fibrilation	10
Heart Failure	28
Chronic Obstructive Pulmonary Disease	10
Diabetes	63
Dementia	10
Cancer	12

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Cynthia Joan Herrick, MD, FACP treated as an endocrinologist in Hazelwood, MO during 2021 were lab tests, preventive care, diabetes management and hospital care.

Volume of procedures performed by Dr. Cynthia Joan Herrick, MD, FACP for Medicare patients.

diabetes management	32
doctor visit	62
hospital care	13
inpatient care	13
lab tests	54
preventive care	54

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP.

**Gender**
Male	40
Female	52

**Ethnicity**
Non-Hispanic White	80
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	46
From 75 to 84	0
85 and over	0
Less than 65	30

Conditions of Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP in 2021

Hypertension	75
High Cholesterol	72
Stroke	0
Ischemic Heart Disease	41
Depression	47
Chronic Kidney Disease	59
Asthma	14
Osteoperosis	12
Atrial Fibrilation	15
Heart Failure	30
Chronic Obstructive Pulmonary Disease	23
Diabetes	64
Dementia	14
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Cynthia Joan Herrick, MD, FACP treated as an endocrinologist in Hazelwood, MO during 2022 were lab tests, preventive care, diabetes management and hospital care.

Volume of procedures performed by Dr. Cynthia Joan Herrick, MD, FACP for Medicare patients.

diabetes management	38
doctor visit	78
hospital care	33
inpatient care	33
lab tests	58
minimally invasive procedures	14
preventive care	58

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP.

**Gender**
Male	45
Female	75

**Ethnicity**
Non-Hispanic White	100
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	62
From 75 to 84	27
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP in 2022

Hypertension	75
High Cholesterol	75
Stroke	13
Ischemic Heart Disease	28
Depression	31
Chronic Kidney Disease	40
Asthma	10
Osteoperosis	30
Atrial Fibrilation	20
Heart Failure	23
Chronic Obstructive Pulmonary Disease	17
Diabetes	55
Dementia	10
Cancer	14

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Cynthia Joan Herrick, MD, FACP treated as an endocrinologist in Hazelwood, MO during 2023 were hospital care, inpatient care, lab tests and diabetes management.

Volume of procedures performed by Dr. Cynthia Joan Herrick, MD, FACP for Medicare patients.

diabetes management	46
doctor visit	93
hospital care	100
inpatient care	100
lab tests	46
preventive care	31

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP.

**Gender**
Male	70
Female	87

**Ethnicity**
Non-Hispanic White	130
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	76
From 75 to 84	0
85 and over	0
Less than 65	42

Conditions of Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP in 2023

Hypertension	75
High Cholesterol	75
Stroke	20
Ischemic Heart Disease	46
Depression	38
Chronic Kidney Disease	50
Asthma	18
Osteoperosis	21
Atrial Fibrilation	19
Heart Failure	31
Chronic Obstructive Pulmonary Disease	20
Diabetes	64
Dementia	15
Cancer	18

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Volume of procedures performed by Dr. Cynthia Joan Herrick, MD, FACP for Medicare patients.

The highest averages for the top procedures that Dr. Cynthia Joan Herrick, MD, FACP treated as an endocrinologist in Hazelwood, MO were lab tests, diabetes management, hospital care and inpatient care.

blood draw	37
diabetes management	79
doctor visit	89
hospital care	51
inpatient care	51
lab tests	83
minimally invasive procedures	17
neck imaging	12
preventive care	47
ultrasound (sonogram)	12

Average Medicare Patient Data From 2012 - 2023

Information about Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP.

**Gender**
Male	50
Female	84

**Ethnicity**
Black / African American	4
Asian / Pacific Islander	0
Non-Hispanic White	101
Hispanic	0
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	2
85 and over	0
Less than 65	50
65 to 74	53

Average of Total of Conditions of Medicare patients treated by Dr. Cynthia Joan Herrick, MD, FACP From 2012 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. Cynthia Joan Herrick, MD, FACP treated were hypertension, high cholesterol, diabetes and chronic kidney disease.

Hypertension	67
High Cholesterol	59
Stroke	4
Ischemic Heart Disease	37
Depression	35
Chronic Kidney Disease	50
Asthma	11
Osteoporosis	14
Heart Failure	28
Chronic Obstructive Pulmonary Disease	17
Diabetes	55
Atrial Fibrillation	11
Cancer	8
Dementia	8

Education & Training

Dr. Cynthia Joan Herrick, MD, FACP graduated from Washington University in St. Louis School of Medicine in 2006. She is certified by the Internal Medicine Endocrinology, Diabetes & Metabolism and has a state license in Missouri.

Medical School: Washington University in St. Louis School of Medicine (2006)

Board Certification: Internal Medicine Endocrinology, Diabetes & Metabolism

Licensed In: Missouri

Affiliations & Hospitals

Dr. Cynthia Joan Herrick, MD, FACP is associated with these hospitals and organizations:

WashU Medicine

Barnes-Jewish Hospital

Ratings & Reviews

Dr. Cynthia Joan Herrick, MD, FACP has an exceptional overall rating with an average of 4.89 out of 5 stars based on 10 ratings. We collect ratings and reviews of Dr. Cynthia Joan Herrick, MD, FACP from all over the web to help you find the right in Hazelwood, MO.

4.89

Overall Rating

(10 Ratings)

Leave a Review

General Payments

These charts describe general payments received by Dr. Cynthia Joan Herrick, MD, FACP. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Merck Sharp & Dohme Corporation	$170 $170
Medtronic MiniMed, Inc.	$165 Minimed 670G System $125	Insulin pump $40
Lilly USA, LLC	$134 HUMULIN $107	$27
BETA BIONICS, INC.	$126 iLet Bionic Pancreas $126
Novo Nordisk Inc	$126 Ozempic $126
Other	$745 NATPARA $125	t-slim insulin pump $112	OMNIPODINSULINMANAGEMENTSYSTEM $93	Freestyle Libre 2 $79	Synthroid $34	Other $303

**Types of Payments**
Food and Beverage	$1,341
Consulting Fee	$125
Education	$1

Biography

Dr. Cynthia Herrick practices adult endocrinology. She is a graduate of Washington University in St. Louis School of Medicine and a graduate of Massachusetts General Hospital's residency program. These areas are among Dr. Herrick's clinical interests: diabetes, thyroid problems, and metabolism. Her patients gave her an average rating of 5.0 stars (out of 5). Dr. Herrick can accept Anthem, Blue California, and Coventry, as well as other insurance carriers. Her hospital/clinic affiliations include WashU Medicine and Barnes-Jewish Hospital. According to BJC HealthCare, she is currently accepting new patients at her office in Hazelwood, MO.