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Home > OH Providers > Hospitalists

Dr. Anna M. McMaster, MD

Accepting New Patients

(261 Ratings)

Specializes in: Hospital Medicine (Hospitalist) and Family Medicine

University of Toledo College of Medicine (1998)

1400 E 2nd Street
Defiance, OH 43512

(419) 783-3261

Dr. Anna M. McMaster, MD is a hospitalist in Defiance, OH specializing in hospital medicine (hospitalist) and family medicine. She graduated from University of Toledo College of Medicine in 1998 and has 28 years of experience. Dr. Anna M. McMaster, MD is affiliated with Mercy Health, Mercy Health - Defiance Hospital and Henry County Hospital.

Office Locations

1400 E 2nd Street
Defiance, OH 43512

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1600 E. Riverview Avenue Suite 101
Napoleon, OH 43545

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105 East Street
Liberty Center, OH 43532

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In The News

“Dr. Anna McMaster, president-elect of the Ohio Academy of Family Physicians, said the bill would "fragment" health care.”—"Doctors testify against letting NPs practice independently", Dayton Daily News, May 2019

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Anna M. McMaster, MD treated as a hospitalist in Defiance, OH during 2012 were hospital care, inpatient care, lab tests and preventive care.

Volume of procedures performed by Dr. Anna M. McMaster, MD for Medicare patients.

aspiration	26
doctor visit	904
hospital care	255
injections	26
inpatient care	255
lab tests	200
nursing home care	59
preventive care	113
vaccines	113

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Anna M. McMaster, MD treated as a hospitalist in Defiance, OH during 2013 were lab tests, hospital care, inpatient care and preventive care.

Volume of procedures performed by Dr. Anna M. McMaster, MD for Medicare patients.

aspiration	28
doctor visit	966
hospital care	220
injections	28
inpatient care	220
lab tests	284
nursing home care	66
preventive care	122
vaccines	122

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Anna M. McMaster, MD.

**Gender**
Male	90
Female	250

**Ethnicity**
Non-Hispanic White	322
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	125
From 75 to 84	114
85 and over	58
Less than 65	43

Conditions of Medicare patients treated by Dr. Anna M. McMaster, MD in 2013

Hypertension	75
High Cholesterol	55
Stroke	6
Ischemic Heart Disease	31
Depression	14
Chronic Kidney Disease	18
Asthma	8
Osteoperosis	12
Atrial Fibrilation	10
Heart Failure	24
Chronic Obstructive Pulmonary Disease	18
Diabetes	29
Dementia	12
Cancer	8

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Anna M. McMaster, MD treated as a hospitalist in Defiance, OH during 2014 were lab tests, hospital care, inpatient care and preventive care.

Volume of procedures performed by Dr. Anna M. McMaster, MD for Medicare patients.

doctor visit	973
hospital care	191
inpatient care	191
lab tests	242
nursing home care	53
preventive care	112
vaccines	112

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Anna M. McMaster, MD.

**Gender**
Male	91
Female	247

**Ethnicity**
Non-Hispanic White	317
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	135
From 75 to 84	115
85 and over	54
Less than 65	34

Conditions of Medicare patients treated by Dr. Anna M. McMaster, MD in 2014

Hypertension	75
High Cholesterol	54
Stroke	7
Ischemic Heart Disease	30
Depression	16
Chronic Kidney Disease	19
Asthma	11
Osteoperosis	10
Atrial Fibrilation	11
Heart Failure	25
Chronic Obstructive Pulmonary Disease	17
Diabetes	28
Dementia	9
Cancer	5

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Anna M. McMaster, MD treated as a hospitalist in Defiance, OH during 2015 were lab tests, preventive care, vaccines and hospital care.

Volume of procedures performed by Dr. Anna M. McMaster, MD for Medicare patients.

aspiration	33
diabetes management	25
doctor visit	1031
hospital care	190
injections	33
inpatient care	190
lab tests	278
nursing home care	73
preventive care	271
vaccines	246

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Anna M. McMaster, MD.

**Gender**
Male	230
Female	534

**Ethnicity**
Non-Hispanic White	720
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	272
From 75 to 84	252
85 and over	146
Less than 65	94

Conditions of Medicare patients treated by Dr. Anna M. McMaster, MD in 2015

Hypertension	75
High Cholesterol	54
Stroke	8
Ischemic Heart Disease	32
Depression	23
Chronic Kidney Disease	23
Asthma	14
Osteoperosis	10
Atrial Fibrilation	14
Heart Failure	27
Chronic Obstructive Pulmonary Disease	23
Diabetes	30
Dementia	14
Cancer	9

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Anna M. McMaster, MD treated as a hospitalist in Defiance, OH during 2016 were preventive care, lab tests, vaccines and hospital care.

Volume of procedures performed by Dr. Anna M. McMaster, MD for Medicare patients.

aspiration	34
diabetes management	154
doctor visit	1135
hospital care	174
injections	34
inpatient care	174
lab tests	358
nursing home care	71
preventive care	359
vaccines	205

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Anna M. McMaster, MD.

**Gender**
Male	138
Female	355

**Ethnicity**
Non-Hispanic White	469
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	203
From 75 to 84	154
85 and over	81
Less than 65	55

Conditions of Medicare patients treated by Dr. Anna M. McMaster, MD in 2016

Hypertension	73
High Cholesterol	48
Stroke	5
Ischemic Heart Disease	27
Depression	21
Chronic Kidney Disease	22
Asthma	20
Osteoperosis	10
Atrial Fibrilation	11
Heart Failure	20
Chronic Obstructive Pulmonary Disease	17
Diabetes	26
Dementia	13
Cancer	8

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Anna M. McMaster, MD treated as a hospitalist in Defiance, OH during 2017 were preventive care, lab tests, vaccines and hospital care.

Volume of procedures performed by Dr. Anna M. McMaster, MD for Medicare patients.

aspiration	21
diabetes management	143
doctor visit	1112
hospital care	158
injections	21
inpatient care	145
lab tests	336
nursing home care	31
outpatient care	13
preventive care	349
vaccines	195

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Anna M. McMaster, MD.

**Gender**
Male	129
Female	318

**Ethnicity**
Non-Hispanic White	422
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	183
From 75 to 84	142
85 and over	75
Less than 65	47

Conditions of Medicare patients treated by Dr. Anna M. McMaster, MD in 2017

Hypertension	73
High Cholesterol	42
Stroke	5
Ischemic Heart Disease	29
Depression	25
Chronic Kidney Disease	24
Asthma	8
Osteoperosis	8
Atrial Fibrilation	13
Heart Failure	21
Chronic Obstructive Pulmonary Disease	18
Diabetes	30
Dementia	12
Cancer	8

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Anna M. McMaster, MD treated as a hospitalist in Defiance, OH during 2018 were preventive care, lab tests, vaccines and diabetes management.

Volume of procedures performed by Dr. Anna M. McMaster, MD for Medicare patients.

aspiration	40
diabetes management	176
doctor visit	983
hospital care	60
injections	40
inpatient care	60
lab tests	337
preventive care	387
vaccines	196

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Anna M. McMaster, MD.

**Gender**
Male	96
Female	290

**Ethnicity**
Non-Hispanic White	365
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	165
From 75 to 84	122
85 and over	57
Less than 65	42

Conditions of Medicare patients treated by Dr. Anna M. McMaster, MD in 2018

Hypertension	73
High Cholesterol	47
Stroke	3
Ischemic Heart Disease	26
Depression	23
Chronic Kidney Disease	25
Asthma	7
Osteoperosis	7
Atrial Fibrilation	13
Heart Failure	20
Chronic Obstructive Pulmonary Disease	17
Diabetes	29
Dementia	7
Cancer	8

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Anna M. McMaster, MD treated as a hospitalist in Defiance, OH during 2019 were lab tests, preventive care, diabetes management and vaccines.

Volume of procedures performed by Dr. Anna M. McMaster, MD for Medicare patients.

aspiration	32
diabetes management	176
doctor visit	979
hospital care	67
injections	32
inpatient care	67
lab tests	357
preventive care	342
vaccines	151

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Anna M. McMaster, MD.

**Gender**
Male	105
Female	293

**Ethnicity**
Non-Hispanic White	374
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	165
From 75 to 84	132
85 and over	60
Less than 65	41

Conditions of Medicare patients treated by Dr. Anna M. McMaster, MD in 2019

Hypertension	75
High Cholesterol	54
Stroke	5
Ischemic Heart Disease	28
Depression	23
Chronic Kidney Disease	25
Asthma	9
Osteoperosis	11
Atrial Fibrilation	15
Heart Failure	22
Chronic Obstructive Pulmonary Disease	20
Diabetes	31
Dementia	8
Cancer	9

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Anna M. McMaster, MD treated as a hospitalist in Defiance, OH during 2020 were lab tests, hospital care, inpatient care and aspiration.

Volume of procedures performed by Dr. Anna M. McMaster, MD for Medicare patients.

aspiration	23
doctor visit	810
hospital care	54
injections	23
inpatient care	54
lab tests	97

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Anna M. McMaster, MD.

**Gender**
Male	122
Female	284

**Ethnicity**
Non-Hispanic White	379
Black	0
Hispanic	14
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	163
From 75 to 84	131
85 and over	72
Less than 65	40

Conditions of Medicare patients treated by Dr. Anna M. McMaster, MD in 2020

Hypertension	73
High Cholesterol	53
Stroke	3
Ischemic Heart Disease	29
Depression	24
Chronic Kidney Disease	24
Asthma	9
Osteoperosis	11
Atrial Fibrilation	18
Heart Failure	23
Chronic Obstructive Pulmonary Disease	16
Diabetes	30
Dementia	8
Cancer	8

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Anna M. McMaster, MD treated as a hospitalist in Defiance, OH during 2021 were hospital care, inpatient care, aspiration and injections.

Volume of procedures performed by Dr. Anna M. McMaster, MD for Medicare patients.

aspiration	19
doctor visit	805
hospital care	54
injections	19
inpatient care	54
preventive care	13

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Anna M. McMaster, MD.

**Gender**
Male	132
Female	270

**Ethnicity**
Non-Hispanic White	385
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	175
From 75 to 84	119
85 and over	80
Less than 65	28

Conditions of Medicare patients treated by Dr. Anna M. McMaster, MD in 2021

Hypertension	73
High Cholesterol	56
Stroke	5
Ischemic Heart Disease	30
Depression	25
Chronic Kidney Disease	27
Asthma	6
Osteoperosis	9
Atrial Fibrilation	17
Heart Failure	25
Chronic Obstructive Pulmonary Disease	16
Diabetes	29
Dementia	12
Cancer	9

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Anna M. McMaster, MD treated as a hospitalist in Defiance, OH during 2022 were hospital care, inpatient care and preventive care.

Volume of procedures performed by Dr. Anna M. McMaster, MD for Medicare patients.

doctor visit	729
hospital care	38
inpatient care	38
preventive care	13

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Anna M. McMaster, MD.

**Gender**
Male	92
Female	254

**Ethnicity**
Non-Hispanic White	324
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	151
From 75 to 84	108
85 and over	65
Less than 65	22

Conditions of Medicare patients treated by Dr. Anna M. McMaster, MD in 2022

Hypertension	75
High Cholesterol	66
Stroke	9
Ischemic Heart Disease	23
Depression	19
Chronic Kidney Disease	23
Asthma	8
Osteoperosis	14
Atrial Fibrilation	23
Heart Failure	20
Chronic Obstructive Pulmonary Disease	21
Diabetes	31
Dementia	8
Cancer	13

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Anna M. McMaster, MD for Medicare patients.

The highest averages for the top procedures that Dr. Anna M. McMaster, MD treated as a hospitalist in Defiance, OH were lab tests, preventive care, vaccines and diabetes management.

aspiration	28
diabetes management	134
doctor visit	947
hospital care	132
injections	28
inpatient care	131
lab tests	276
nursing home care	58
outpatient care	13
preventive care	208
vaccines	167

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Anna M. McMaster, MD.

**Gender**
Male	111
Female	281

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	370
Hispanic	1
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	126
85 and over	68
Less than 65	40
65 to 74	157

Average of Total of Conditions of Medicare patients treated by Dr. Anna M. McMaster, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Anna M. McMaster, MD treated were hypertension, high cholesterol, diabetes and ischemic heart disease.

Hypertension	67
High Cholesterol	48
Stroke	5
Ischemic Heart Disease	25
Depression	19
Chronic Kidney Disease	20
Asthma	9
Osteoporosis	9
Heart Failure	20
Chronic Obstructive Pulmonary Disease	16
Diabetes	26
Atrial Fibrillation	13
Cancer	7
Dementia	9

Education & Training

Dr. Anna M. McMaster, MD graduated from University of Toledo College of Medicine in 1998. She completed residency at The University of Toledo Affiliated Hospitals. She is certified by the American Board of Family Medicine and has a state license in Ohio.

Medical School: University of Toledo College of Medicine (1998)

Residency: The University of Toledo Affiliated Hospitals (2000)

Board Certification: American Board of Family Medicine

Licensed In: Ohio

Affiliations & Hospitals

Dr. Anna M. McMaster, MD is associated with these hospitals and organizations:

Mercy Health

Mercy Health - Defiance Hospital

Henry County Hospital

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. Anna M. McMaster, MD appears to accept the following insurance providers: WellCare, AmeriHealth, Medicare Advantage, McLaren Health Plan, MultiPlan, Medical Mutual, HealthSpring, United Healthcare, Medicaid, Humana, Cigna, Molina Healthcare, Anthem, Health Alliance Plan (HAP), HealthSmart, Ohio Health Choice, Parkview-Signature One OH, Medigold OH, Valor Health Plan OH, CareSource OH, Aetna Better Health OH, Aetna Commercial & Aetna Medicare OH, Frontpath Health Coalition OH, The Health Plan OH, Align Senior Care OH, Immergrun OH, Paramount Commercial OH, CIN-MHS NON-MSSP, Buckeye Health Plan OH, Quality Care Partners PPO OH, CIN-MHS MSSP, Medicare Railroad KY & OH, SummaCare OH, Medicare OH, Sedgwick/Careworks KY OH SC VA, Payer Provider and Lutheran Preferred OH.

Insurance Accepted by Provider includes:

According to our sources, Dr. Anna M. McMaster, MD accepts the following insurance providers:

WellCare

AmeriHealth

Medicare Advantage

McLaren Health Plan

MultiPlan

Medical Mutual

HealthSpring

United Healthcare

Medicaid

Humana

Cigna

Molina Healthcare

Anthem

Health Alliance Plan (HAP)

HealthSmart

Ohio Health Choice

Parkview-Signature One OH

Medigold OH

Valor Health Plan OH

CareSource OH

Aetna Better Health OH

Aetna Commercial & Aetna Medicare OH

Frontpath Health Coalition OH

The Health Plan OH

Align Senior Care OH

Immergrun OH

Paramount Commercial OH

CIN-MHS NON-MSSP

Buckeye Health Plan OH

Quality Care Partners PPO OH

CIN-MHS MSSP

Medicare Railroad KY & OH

SummaCare OH

Medicare OH

Sedgwick/Careworks KY OH SC VA

Payer Provider

Lutheran Preferred OH

Ratings & Reviews

Dr. Anna M. McMaster, MD has an exceptional overall rating with an average of 4.91 out of 5 stars based on 261 ratings. We collect ratings and reviews of Dr. Anna M. McMaster, MD from all over the web to help you find the right in Defiance, OH.

4.91

Overall Rating

(261 Ratings)

Leave a Review

Reviews From Around The Web

Overall Rating: 5.0 2025-07-04

Patient verified via Press Ganey

Dr McMaster is the best doctor ever. She goes above and beyond with caring for me, listening, presenting options, explaining things to me, and is very, very thorough in her examination and answering questions. She is kind, patient and it is obvious she cares. She also always figures out what is going on very quickly. I know without a doubt I will receive the BEST most compassionate care from Dr. McMaster and her team every time! Thank you to all!

Overall Rating: 5.0 2024-07-13

Patient verified via Press Ganey

I have always received excellent care from Dr McMaster and everyone in her office.

Overall Rating: 5.0 2024-01-19

Patient verified via Press Ganey

Dr McMaster is genuine. She is professional, friendly, informative, caring

Overall Rating: 5.0 2025-07-24

Patient verified via Press Ganey

Dr McMaster is the best. I would recommend her to anyone!

Overall Rating: 5.0 2025-12-14

Patient verified via Press Ganey

Dr mcmaster is a very good Dr and is making a difference

Overall Rating: 5.0 2024-07-18

Patient verified via Press Ganey

Always finding that it's a good experience.

Overall Rating: 5.0 2024-10-04

Patient verified via Press Ganey

Dr McMaster is an excellent doctor

Overall Rating: 5.0 2024-08-27

Patient verified via Press Ganey

We love our doctor!

Overall Rating: 5.0 2025-07-29

Patient verified via Press Ganey

Love Dr. McMaster!

Overall Rating: 4.0 2024-10-22

Patient verified via Press Ganey

Was good visit

General Payments

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

**Payments by Company**
SANOFI-AVENTIS U.S. LLC	$314 TOUJEO $206	LANTUS $96	AFREZZA $12
AstraZeneca Pharmaceuticals LP	$246 SYMBICORT $114	FARXIGA $48	BEVESPI AEROSPHERE $34	CRESTOR $22	BYDUREON PEN $16	Other $12
Boehringer Ingelheim Pharmaceuticals, Inc.	$201 OFEV $125	TRADJENTA $19	JARDIANCE $17	SPIRIVA RESPIMAT $16	COMBIVENT RESPIMAT $12	Other $12
GlaxoSmithKline, LLC.	$177 ANORO $47	BREO $45	TRELEGY ELLIPTA $35	TANZEUM $14	INCRUSE $13	Other $24
Janssen Pharmaceuticals, Inc	$157 XARELTO $83	INVOKANA $74
Other	$1,042 ENTRESTO $96	XIFAXAN $67	Vesicare $64	ELIQUIS $61	Prolia $57	Other $696

**Types of Payments**
Food and Beverage	$2,136
Education	$2

Biography

Dr. Anna McMaster is a specialist in family medicine and hospital medicine (hospitalist). Before completing her residency at a hospital affiliated with The University of Toledo, Dr. McMaster attended medical school at the University of Toledo College of Medicine. She is rated highly by her patients. Dr. McMaster appears to be in-network for McLaren Health Plan, Anthem, Medical Mutual, and more. Dr. McMaster's hospital/clinic affiliations include Henry County Hospital and Mercy Health - Defiance Hospital. Her practice in Defiance, OH is open to new patients as reported by Doctor.com.