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Dr. Jennifer Grayzar, MD

Accepting New Patients

(2 Ratings)

Specializes in: Urgent Care and Emergency Medicine

Ohio State University College of Medicine

2540 East Street Emergency Department
Concord, CA 94520

(925) 674-2335

Dr. Jennifer Grayzar, MD is an urgent care doctor in San Rafael, CA specializing in urgent care and emergency medicine. She graduated from Ohio State University College of Medicine. Dr. Jennifer Grayzar, MD is affiliated with John Muir Health and Marin General Hospital.

Office Locations

4000 Civic Center Drive Suite 206
San Rafael, CA 94903

open_in_new

335 South McDowell Boulevard
Petaluma, CA 94954

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John Muir Health

2540 East Street Emergency Department
Concord, CA 94520

(925) 674-2335

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Noteworthy Medicare Patient Procedures Performed by Dr. Jennifer Grayzar, MD in 2023

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

Top 10%

By Volume:

emergency room care

In 2023, Dr. Jennifer Grayzar, MD performed more emergency room (ER) care procedures for Medicare patients than 90% of providers in related specialties within California.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Jennifer Grayzar, MD treated as an urgent care doctor in San Rafael, CA during 2012 were emergency care, X-rays and thoracic (chest) imaging.

Volume of procedures performed by Dr. Jennifer Grayzar, MD for Medicare patients.

emergency care	777
thoracic (chest) imaging	48
X-rays	48

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Jennifer Grayzar, MD treated as an urgent care doctor in San Rafael, CA during 2013 were emergency care, X-rays and thoracic (chest) imaging.

Volume of procedures performed by Dr. Jennifer Grayzar, MD for Medicare patients.

emergency care	724
thoracic (chest) imaging	54
X-rays	54

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Grayzar, MD.

**Gender**
Male	292
Female	420

**Ethnicity**
Non-Hispanic White	467
Black	82
Hispanic	103
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	197
From 75 to 84	171
85 and over	138
Less than 65	206

Conditions of Medicare patients treated by Dr. Jennifer Grayzar, MD in 2013

Hypertension	75
High Cholesterol	57
Stroke	10
Ischemic Heart Disease	43
Depression	41
Chronic Kidney Disease	43
Asthma	18
Osteoperosis	9
Atrial Fibrilation	18
Heart Failure	35
Chronic Obstructive Pulmonary Disease	29
Diabetes	42
Dementia	21
Cancer	13

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Jennifer Grayzar, MD treated as an urgent care doctor in San Rafael, CA during 2014 were emergency care, X-rays and thoracic (chest) imaging.

Volume of procedures performed by Dr. Jennifer Grayzar, MD for Medicare patients.

emergency care	800
thoracic (chest) imaging	68
X-rays	68

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Grayzar, MD.

**Gender**
Male	312
Female	453

**Ethnicity**
Non-Hispanic White	479
Black	103
Hispanic	120
Asian	46
Other	0
Native American	0

**Age**
From 65 to 74	220
From 75 to 84	173
85 and over	121
Less than 65	251

Conditions of Medicare patients treated by Dr. Jennifer Grayzar, MD in 2014

Hypertension	75
High Cholesterol	56
Stroke	13
Ischemic Heart Disease	44
Depression	40
Chronic Kidney Disease	46
Asthma	18
Osteoperosis	8
Atrial Fibrilation	16
Heart Failure	33
Chronic Obstructive Pulmonary Disease	26
Diabetes	43
Dementia	20
Cancer	12

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Jennifer Grayzar, MD treated as an urgent care doctor in San Rafael, CA during 2015 were emergency care, X-rays and thoracic (chest) imaging.

Volume of procedures performed by Dr. Jennifer Grayzar, MD for Medicare patients.

emergency care	722
thoracic (chest) imaging	23
X-rays	23

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Grayzar, MD.

**Gender**
Male	584
Female	804

**Ethnicity**
Non-Hispanic White	846
Black	174
Hispanic	240
Asian	104
Other	0
Native American	0

**Age**
From 65 to 74	348
From 75 to 84	320
85 and over	280
Less than 65	440

Conditions of Medicare patients treated by Dr. Jennifer Grayzar, MD in 2015

Hypertension	75
High Cholesterol	57
Stroke	13
Ischemic Heart Disease	40
Depression	37
Chronic Kidney Disease	48
Asthma	25
Osteoperosis	8
Atrial Fibrilation	15
Heart Failure	33
Chronic Obstructive Pulmonary Disease	27
Diabetes	43
Dementia	23
Cancer	12

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Jennifer Grayzar, MD treated as an urgent care doctor in San Rafael, CA during 2016 were emergency care, X-rays and thoracic (chest) imaging.

Volume of procedures performed by Dr. Jennifer Grayzar, MD for Medicare patients.

emergency care	714
thoracic (chest) imaging	13
X-rays	13

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Grayzar, MD.

**Gender**
Male	334
Female	417

**Ethnicity**
Non-Hispanic White	498
Black	79
Hispanic	103
Asian	48
Other	0
Native American	0

**Age**
From 65 to 74	233
From 75 to 84	187
85 and over	160
Less than 65	171

Conditions of Medicare patients treated by Dr. Jennifer Grayzar, MD in 2016

Hypertension	75
High Cholesterol	59
Stroke	11
Ischemic Heart Disease	45
Depression	36
Chronic Kidney Disease	54
Asthma	33
Osteoperosis	10
Atrial Fibrilation	20
Heart Failure	35
Chronic Obstructive Pulmonary Disease	27
Diabetes	42
Dementia	23
Cancer	11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Jennifer Grayzar, MD treated as an urgent care doctor in San Rafael, CA during 2017 were emergency care, X-rays and thoracic (chest) imaging.

Volume of procedures performed by Dr. Jennifer Grayzar, MD for Medicare patients.

doctor visit	17
emergency care	662
thoracic (chest) imaging	14
X-rays	14

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Grayzar, MD.

**Gender**
Male	292
Female	415

**Ethnicity**
Non-Hispanic White	438
Black	74
Hispanic	114
Asian	62
Other	0
Native American	0

**Age**
From 65 to 74	230
From 75 to 84	190
85 and over	140
Less than 65	147

Conditions of Medicare patients treated by Dr. Jennifer Grayzar, MD in 2017

Hypertension	75
High Cholesterol	56
Stroke	10
Ischemic Heart Disease	43
Depression	41
Chronic Kidney Disease	57
Asthma	19
Osteoperosis	10
Atrial Fibrilation	21
Heart Failure	38
Chronic Obstructive Pulmonary Disease	29
Diabetes	42
Dementia	21
Cancer	14

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Jennifer Grayzar, MD treated as an urgent care doctor in San Rafael, CA during 2018 were emergency care.

Volume of procedures performed by Dr. Jennifer Grayzar, MD for Medicare patients.

doctor visit	20
emergency care	605

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Grayzar, MD.

**Gender**
Male	281
Female	385

**Ethnicity**
Non-Hispanic White	409
Black	86
Hispanic	107
Asian	44
Other	0
Native American	0

**Age**
From 65 to 74	212
From 75 to 84	205
85 and over	106
Less than 65	143

Conditions of Medicare patients treated by Dr. Jennifer Grayzar, MD in 2018

Hypertension	75
High Cholesterol	66
Stroke	10
Ischemic Heart Disease	47
Depression	37
Chronic Kidney Disease	61
Asthma	16
Osteoperosis	10
Atrial Fibrilation	20
Heart Failure	42
Chronic Obstructive Pulmonary Disease	28
Diabetes	44
Dementia	19
Cancer	15

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Jennifer Grayzar, MD treated as an urgent care doctor in San Rafael, CA during 2019 were emergency care.

Volume of procedures performed by Dr. Jennifer Grayzar, MD for Medicare patients.

doctor visit	12
emergency care	665

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Grayzar, MD.

**Gender**
Male	321
Female	411

**Ethnicity**
Non-Hispanic White	445
Black	97
Hispanic	110
Asian	61
Other	0
Native American	0

**Age**
From 65 to 74	246
From 75 to 84	174
85 and over	132
Less than 65	180

Conditions of Medicare patients treated by Dr. Jennifer Grayzar, MD in 2019

Hypertension	75
High Cholesterol	64
Stroke	9
Ischemic Heart Disease	44
Depression	41
Chronic Kidney Disease	60
Asthma	19
Osteoperosis	11
Atrial Fibrilation	20
Heart Failure	40
Chronic Obstructive Pulmonary Disease	30
Diabetes	44
Dementia	23
Cancer	13

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Jennifer Grayzar, MD treated as an urgent care doctor in San Rafael, CA during 2020 were emergency care.

Volume of procedures performed by Dr. Jennifer Grayzar, MD for Medicare patients.

emergency care	518

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Grayzar, MD.

**Gender**
Male	269
Female	303

**Ethnicity**
Non-Hispanic White	332
Black	83
Hispanic	97
Asian	45
Other	0
Native American	0

**Age**
From 65 to 74	196
From 75 to 84	145
85 and over	87
Less than 65	144

Conditions of Medicare patients treated by Dr. Jennifer Grayzar, MD in 2020

Hypertension	75
High Cholesterol	64
Stroke	10
Ischemic Heart Disease	46
Depression	43
Chronic Kidney Disease	61
Asthma	18
Osteoperosis	9
Atrial Fibrilation	20
Heart Failure	35
Chronic Obstructive Pulmonary Disease	28
Diabetes	47
Dementia	23
Cancer	13

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Jennifer Grayzar, MD treated as an urgent care doctor in San Rafael, CA during 2021 were emergency care.

Volume of procedures performed by Dr. Jennifer Grayzar, MD for Medicare patients.

emergency care	650

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Grayzar, MD.

**Gender**
Male	298
Female	417

**Ethnicity**
Non-Hispanic White	419
Black	82
Hispanic	117
Asian	61
Other	0
Native American	0

**Age**
From 65 to 74	251
From 75 to 84	204
85 and over	123
Less than 65	137

Conditions of Medicare patients treated by Dr. Jennifer Grayzar, MD in 2021

Hypertension	75
High Cholesterol	71
Stroke	11
Ischemic Heart Disease	46
Depression	41
Chronic Kidney Disease	61
Asthma	18
Osteoperosis	13
Atrial Fibrilation	22
Heart Failure	40
Chronic Obstructive Pulmonary Disease	26
Diabetes	49
Dementia	25
Cancer	14

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Jennifer Grayzar, MD treated as an urgent care doctor in San Rafael, CA during 2022 were emergency care.

Volume of procedures performed by Dr. Jennifer Grayzar, MD for Medicare patients.

emergency care	547

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Jennifer Grayzar, MD.

**Gender**
Male	252
Female	336

**Ethnicity**
Non-Hispanic White	329
Black	75
Hispanic	111
Asian	49
Other	0
Native American	0

**Age**
From 65 to 74	217
From 75 to 84	175
85 and over	110
Less than 65	86

Conditions of Medicare patients treated by Dr. Jennifer Grayzar, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	19
Ischemic Heart Disease	38
Depression	38
Chronic Kidney Disease	48
Asthma	19
Osteoperosis	17
Atrial Fibrilation	30
Heart Failure	37
Chronic Obstructive Pulmonary Disease	28
Diabetes	47
Dementia	21
Cancer	17

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Jennifer Grayzar, MD for Medicare patients.

The highest averages for the top procedures that Dr. Jennifer Grayzar, MD treated as an urgent care doctor in San Rafael, CA were emergency care, X-rays and thoracic (chest) imaging.

doctor visit	16
emergency care	671
thoracic (chest) imaging	36
X-rays	36

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Jennifer Grayzar, MD.

**Gender**
Female	396
Male	294

**Ethnicity**
Black / African American	85
Asian / Pacific Islander	47
Non-Hispanic White	423
Hispanic	111
Native American / Alaskan Native	0
Other	0

**Age**
85 and over	127
75 to 84	176
Less than 65	173
65 to 74	213

Average of Total of Conditions of Medicare patients treated by Dr. Jennifer Grayzar, MD From 2012 - 2022

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

Hypertension	68
High Cholesterol	56
Stroke	10
Ischemic Heart Disease	39
Depression	35
Chronic Kidney Disease	49
Asthma	18
Osteoporosis	9
Heart Failure	33
Chronic Obstructive Pulmonary Disease	25
Diabetes	40
Atrial Fibrillation	18
Dementia	19
Cancer	12

Education & Training

Dr. Jennifer Grayzar, MD graduated from Ohio State University College of Medicine. She completed residency at Eastern Virginia Medical School Affiliated Hospitals. She is certified by the American Board of Emergency Medicine and has a state license in California.

Medical School: Ohio State University College of Medicine

Residency: Eastern Virginia Medical School Affiliated Hospitals

Board Certification: American Board of Emergency Medicine

Licensed In: California

Affiliations & Hospitals

Dr. Jennifer Grayzar, MD is associated with these hospitals and organizations:

John Muir Health

Marin General Hospital

Ratings & Reviews

Dr. Jennifer Grayzar, MD has an exceptional overall rating with an average of 5.0 out of 5 stars based on 2 ratings. We collect ratings and reviews of Dr. Jennifer Grayzar, MD from all over the web to help you find the right in San Rafael, CA.

Overall Rating

(2 Ratings)

Leave a Review

Reviews From Around The Web

Overall Rating: 5.0 2025-12-31

Patient verified via Press Ganey

Doctor was very good did not think I needed any additional medication.

Overall Rating: 5.0 2026-04-12

Patient verified via Press Ganey

Once she came in it went very well.

Biography

Dr. Jennifer Grayzar is a specialist in urgent care and emergency medicine. She attended medical school at Ohio State University College of Medicine. For her professional training, Dr. Grayzar completed a residency program at a hospital affiliated with Eastern Virginia Medical School. Dr. Grayzar's professional affiliations include Marin General Hospital and John Muir Health. Her practice in San Rafael, CA is open to new patients as reported by Doctor.com.