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Dr. Mary Margaret Johnson, MD

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Specializes in: Internal Medicine (Adult Medicine) and Hospital Medicine (Hospitalist)
200 N Madison Street
Marshall, MI 49068

Dr. Mary Margaret Johnson, MD is an internist in Marshall, MI specializing in internal medicine (adult medicine) and hospital medicine (hospitalist).

View Doctor's Full Profile (269) 781-4271

Office Locations

200 N Madison Street
Marshall, MI 49068
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Noteworthy Medicare Patient Procedures Performed by Dr. Mary Margaret Johnson, MD in 2023

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

Top 5%

By Affordability:

hospital care
inpatient care
inpatient hospital care

In 2023, Dr. Mary Margaret Johnson, MD had a list price for hospital care, inpatient care, and inpatient hospital care (for patient admitted to hospital) that was lower than the list prices billed to Medicare by 95% of providers in related specialties within Michigan. 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. Mary Margaret Johnson, MD treated as an internist in Marshall, MI during 2012 were hospital care, inpatient care, debridement (removal of unhealthy tissue) and outpatient care.

Volume of procedures performed by Dr. Mary Margaret Johnson, MD for Medicare patients.

debridement (removal of unhealthy tissue) 105
doctor visit 294
hospital care 339
inpatient care 266
outpatient care 73

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Johnson, MD treated as an internist in Marshall, MI during 2013 were hospital care, inpatient care, debridement (removal of unhealthy tissue) and outpatient care.

Volume of procedures performed by Dr. Mary Margaret Johnson, MD for Medicare patients.

debridement (removal of unhealthy tissue) 157
doctor visit 74
excision 55
hospital care 434
inpatient care 342
outpatient care 92

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Johnson, MD.

Gender
Male 182
Female 291
Ethnicity
Non-Hispanic White 427
Black 29
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 151
From 75 to 84 133
85 and over 82
Less than 65 107

Conditions of Medicare patients treated by Dr. Mary Margaret Johnson, MD in 2013

Hypertension 75
High Cholesterol 69
Stroke 10
Ischemic Heart Disease 50
Depression 42
Chronic Kidney Disease 43
Asthma 12
Osteoperosis 13
Atrial Fibrilation 18
Heart Failure 37
Chronic Obstructive Pulmonary Disease 34
Diabetes 42
Dementia 21
Cancer 14

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Johnson, MD treated as an internist in Marshall, MI during 2014 were hospital care, inpatient care, outpatient care and debridement (removal of unhealthy tissue).

Volume of procedures performed by Dr. Mary Margaret Johnson, MD for Medicare patients.

debridement (removal of unhealthy tissue) 64
excision 19
hospital care 557
inpatient care 432
outpatient care 125

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Johnson, MD.

Gender
Male 186
Female 251
Ethnicity
Non-Hispanic White 384
Black 34
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 113
From 75 to 84 141
85 and over 88
Less than 65 95

Conditions of Medicare patients treated by Dr. Mary Margaret Johnson, MD in 2014

Hypertension 75
High Cholesterol 72
Stroke 13
Ischemic Heart Disease 61
Depression 41
Chronic Kidney Disease 49
Asthma 11
Osteoperosis 13
Atrial Fibrilation 20
Heart Failure 43
Chronic Obstructive Pulmonary Disease 33
Diabetes 45
Dementia 20
Cancer 15

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Johnson, MD treated as an internist in Marshall, MI during 2015 were hospital care, inpatient care and outpatient care.

Volume of procedures performed by Dr. Mary Margaret Johnson, MD for Medicare patients.

hospital care 725
inpatient care 611
outpatient care 114

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Johnson, MD.

Gender
Male 252
Female 420
Ethnicity
Non-Hispanic White 614
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 174
From 75 to 84 184
85 and over 164
Less than 65 150

Conditions of Medicare patients treated by Dr. Mary Margaret Johnson, MD in 2015

Hypertension 75
High Cholesterol 70
Stroke 13
Ischemic Heart Disease 54
Depression 41
Chronic Kidney Disease 51
Asthma 31
Osteoperosis 17
Atrial Fibrilation 24
Heart Failure 48
Chronic Obstructive Pulmonary Disease 37
Diabetes 43
Dementia 28
Cancer 14

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Johnson, MD treated as an internist in Marshall, MI during 2016 were hospital care, inpatient care and outpatient care.

Volume of procedures performed by Dr. Mary Margaret Johnson, MD for Medicare patients.

hospital care 913
inpatient care 650
outpatient care 263

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Johnson, MD.

Gender
Male 141
Female 234
Ethnicity
Non-Hispanic White 339
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 110
From 75 to 84 120
85 and over 77
Less than 65 68

Conditions of Medicare patients treated by Dr. Mary Margaret Johnson, MD in 2016

Hypertension 75
High Cholesterol 73
Stroke 13
Ischemic Heart Disease 54
Depression 46
Chronic Kidney Disease 60
Asthma 45
Osteoperosis 16
Atrial Fibrilation 25
Heart Failure 51
Chronic Obstructive Pulmonary Disease 44
Diabetes 44
Dementia 30
Cancer 14

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Johnson, MD treated as an internist in Marshall, MI during 2017 were hospital care, inpatient care and outpatient care.

Volume of procedures performed by Dr. Mary Margaret Johnson, MD for Medicare patients.

doctor visit 22
hospital care 819
inpatient care 692
outpatient care 127

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Johnson, MD.

Gender
Male 150
Female 200
Ethnicity
Non-Hispanic White 319
Black 18
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 102
From 75 to 84 99
85 and over 93
Less than 65 56

Conditions of Medicare patients treated by Dr. Mary Margaret Johnson, MD in 2017

Hypertension 75
High Cholesterol 75
Stroke 12
Ischemic Heart Disease 63
Depression 45
Chronic Kidney Disease 71
Asthma 12
Osteoperosis 17
Atrial Fibrilation 25
Heart Failure 54
Chronic Obstructive Pulmonary Disease 50
Diabetes 50
Dementia 35
Cancer 19

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Johnson, MD treated as an internist in Marshall, MI during 2018 were hospital care, inpatient care and outpatient care.

Volume of procedures performed by Dr. Mary Margaret Johnson, MD for Medicare patients.

hospital care 984
inpatient care 798
outpatient care 186

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Johnson, MD.

Gender
Male 180
Female 244
Ethnicity
Non-Hispanic White 389
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 104
From 75 to 84 151
85 and over 92
Less than 65 77

Conditions of Medicare patients treated by Dr. Mary Margaret Johnson, MD in 2018

Hypertension 75
High Cholesterol 74
Stroke 10
Ischemic Heart Disease 59
Depression 42
Chronic Kidney Disease 66
Asthma 8
Osteoperosis 13
Atrial Fibrilation 23
Heart Failure 52
Chronic Obstructive Pulmonary Disease 44
Diabetes 46
Dementia 32
Cancer 14

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Johnson, MD treated as an internist in Marshall, MI during 2019 were hospital care, inpatient care and outpatient care.

Volume of procedures performed by Dr. Mary Margaret Johnson, MD for Medicare patients.

hospital care 1007
inpatient care 749
outpatient care 258

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Johnson, MD.

Gender
Male 167
Female 251
Ethnicity
Non-Hispanic White 381
Black 19
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 124
From 75 to 84 128
85 and over 111
Less than 65 55

Conditions of Medicare patients treated by Dr. Mary Margaret Johnson, MD in 2019

Hypertension 75
High Cholesterol 75
Stroke 12
Ischemic Heart Disease 61
Depression 47
Chronic Kidney Disease 67
Asthma 10
Osteoperosis 11
Atrial Fibrilation 26
Heart Failure 52
Chronic Obstructive Pulmonary Disease 38
Diabetes 48
Dementia 34
Cancer 16

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Johnson, MD treated as an internist in Marshall, MI during 2020 were hospital care, inpatient care and outpatient care.

Volume of procedures performed by Dr. Mary Margaret Johnson, MD for Medicare patients.

hospital care 703
inpatient care 594
outpatient care 109

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Johnson, MD.

Gender
Male 112
Female 168
Ethnicity
Non-Hispanic White 252
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 88
From 75 to 84 96
85 and over 57
Less than 65 39

Conditions of Medicare patients treated by Dr. Mary Margaret Johnson, MD in 2020

Hypertension 75
High Cholesterol 74
Stroke 14
Ischemic Heart Disease 63
Depression 43
Chronic Kidney Disease 65
Asthma 11
Osteoperosis 15
Atrial Fibrilation 20
Heart Failure 45
Chronic Obstructive Pulmonary Disease 42
Diabetes 50
Dementia 34
Cancer 17

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Johnson, MD treated as an internist in Marshall, MI during 2021 were hospital care, inpatient care and outpatient care.

Volume of procedures performed by Dr. Mary Margaret Johnson, MD for Medicare patients.

hospital care 747
inpatient care 668
outpatient care 79

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Johnson, MD.

Gender
Male 109
Female 152
Ethnicity
Non-Hispanic White 239
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 93
From 75 to 84 78
85 and over 58
Less than 65 32

Conditions of Medicare patients treated by Dr. Mary Margaret Johnson, MD in 2021

Hypertension 75
High Cholesterol 75
Stroke 11
Ischemic Heart Disease 59
Depression 40
Chronic Kidney Disease 70
Asthma 8
Osteoperosis 12
Atrial Fibrilation 26
Heart Failure 52
Chronic Obstructive Pulmonary Disease 31
Diabetes 52
Dementia 32
Cancer 12

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Johnson, MD treated as an internist in Marshall, MI during 2022 were hospital care, inpatient care and outpatient care.

Volume of procedures performed by Dr. Mary Margaret Johnson, MD for Medicare patients.

hospital care 645
inpatient care 498
outpatient care 147

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Johnson, MD.

Gender
Male 93
Female 145
Ethnicity
Non-Hispanic White 214
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 59
From 75 to 84 94
85 and over 62
Less than 65 23

Conditions of Medicare patients treated by Dr. Mary Margaret Johnson, MD in 2022

Hypertension 75
High Cholesterol 75
Stroke 15
Ischemic Heart Disease 50
Depression 37
Chronic Kidney Disease 45
Asthma 7
Osteoperosis 17
Atrial Fibrilation 43
Heart Failure 45
Chronic Obstructive Pulmonary Disease 40
Diabetes 45
Dementia 22
Cancer 18

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Mary Margaret Johnson, MD treated as an internist in Marshall, MI during 2023 were hospital care and inpatient care.

Volume of procedures performed by Dr. Mary Margaret Johnson, MD for Medicare patients.

hospital care 469
inpatient care 469

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Mary Margaret Johnson, MD.

Gender
Male 73
Female 92
Ethnicity
Non-Hispanic White 152
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 45
From 75 to 84 70
85 and over 36
Less than 65 14

Conditions of Medicare patients treated by Dr. Mary Margaret Johnson, MD in 2023

Hypertension 75
High Cholesterol 75
Stroke 20
Ischemic Heart Disease 51
Depression 34
Chronic Kidney Disease 50
Asthma 15
Osteoperosis 24
Atrial Fibrilation 42
Heart Failure 43
Chronic Obstructive Pulmonary Disease 42
Diabetes 49
Dementia 18
Cancer 15

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2023

Volume of procedures performed by Dr. Mary Margaret Johnson, MD for Medicare patients.

The highest averages for the top procedures that Dr. Mary Margaret Johnson, MD treated as an internist in Marshall, MI were hospital care, inpatient care, outpatient care and debridement (removal of unhealthy tissue).

debridement (removal of unhealthy tissue) 108
doctor visit 130
excision 37
hospital care 695
inpatient care 564
outpatient care 143

Average Medicare Patient Data From 2012 - 2023

Information about Medicare patients treated by Dr. Mary Margaret Johnson, MD.

Gender
Male 137
Female 204
Ethnicity
Black / African American 8
Asian / Pacific Islander 0
Non-Hispanic White 309
Hispanic 0
Native American / Alaskan Native 0
Other 0
Age
75 to 84 107
85 and over 76
Less than 65 59
65 to 74 96

Average of Total of Conditions of Medicare patients treated by Dr. Mary Margaret Johnson, MD From 2012 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. Mary Margaret Johnson, MD treated were hypertension, high cholesterol, chronic kidney disease and ischemic heart disease.

Hypertension 68
High Cholesterol 67
Stroke 11
Ischemic Heart Disease 52
Depression 38
Chronic Kidney Disease 53
Asthma 14
Osteoporosis 14
Heart Failure 43
Chronic Obstructive Pulmonary Disease 36
Diabetes 42
Atrial Fibrillation 24
Cancer 14
Dementia 25

Education & Training

She has a state license in Michigan.

Licensed In: Michigan

Ratings & Reviews

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General Payments

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

Payments by Company
Smith & Nephew, Inc. $118 Santyl
$86 		Regranex
$32
Otsuka America Pharmaceutical, Inc. $113 SAMSCA
$113
United Therapeutics Corporation $78 ORENITRAM
$78
Novo Nordisk Inc $71 NovoLog
$51 		Levemir
$20
Pfizer Inc. $66 ELIQUIS
$66
Other $190 ELIQUIS
$53 		Peripheral Orbital Atherectomy System
$40 		CUBICIN
$31 		Apligraf
$23 		LANTUS
$19 		Other
$24
Types of Payments
Food and Beverage $635

Biography

Dr. Mary Johnson, who practices in Marshall, MI, is a medical specialist in hospital medicine (hospitalist). She attended medical school at the University of Michigan Medical School.

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