In 2024, Dr. Keith Marcus, MD had a list price for cardiac (heart) stress testing, cardiac procedures, electrocardiogram (EKG), and stress testing 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.

Top 10%

By Affordability:

stress EKG

In 2024, Dr. Keith Marcus, MD had a list price for stress EKG that was lower than the list prices billed to Medicare by 90% 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. Keith Marcus, MD treated as an internist in Ludington, MI during 2012 were hospital care, inpatient care and outpatient care.

Volume of procedures performed by Dr. Keith Marcus, MD for Medicare patients.

hospital care	867
inpatient care	834
outpatient care	33

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Keith Marcus, MD treated as an internist in Ludington, MI during 2013 were hospital care, inpatient care, outpatient care and stress testing.

Volume of procedures performed by Dr. Keith Marcus, MD for Medicare patients.

cardiac procedures	12
hospital care	1077
inpatient care	1018
outpatient care	59
stress testing	12

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Keith Marcus, MD.

**Gender**
Male	241
Female	266

**Age**
From 65 to 74	146
From 75 to 84	160
85 and over	97
Less than 65	104

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2013

Hypertension	75
High Cholesterol	68
Stroke	10
Ischemic Heart Disease	61
Depression	36
Chronic Kidney Disease	49
Asthma	13
Osteoperosis	15
Atrial Fibrilation	27
Heart Failure	49
Chronic Obstructive Pulmonary Disease	47
Diabetes	44
Dementia	19
Cancer	17

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Keith Marcus, MD treated as an internist in Ludington, MI during 2014 were hospital care, inpatient care, outpatient care and stress testing.

Volume of procedures performed by Dr. Keith Marcus, MD for Medicare patients.

cardiac procedures	20
hospital care	927
inpatient care	859
outpatient care	68
stress testing	20

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Keith Marcus, MD.

**Gender**
Male	227
Female	250

**Ethnicity**
Non-Hispanic White	466
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	130
From 75 to 84	145
85 and over	112
Less than 65	90

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2014

Hypertension	75
High Cholesterol	65
Stroke	12
Ischemic Heart Disease	61
Depression	37
Chronic Kidney Disease	54
Asthma	13
Osteoperosis	12
Atrial Fibrilation	26
Heart Failure	49
Chronic Obstructive Pulmonary Disease	45
Diabetes	47
Dementia	23
Cancer	17

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Keith Marcus, MD treated as an internist in Ludington, MI during 2015 were hospital care, inpatient care, outpatient care and stress testing.

Volume of procedures performed by Dr. Keith Marcus, MD for Medicare patients.

cardiac procedures	13
hospital care	828
inpatient care	767
outpatient care	61
stress testing	13

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Keith Marcus, MD.

**Gender**
Male	514
Female	578

**Age**
From 65 to 74	310
From 75 to 84	372
85 and over	220
Less than 65	190

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2015

Hypertension	75
High Cholesterol	67
Stroke	11
Ischemic Heart Disease	60
Depression	39
Chronic Kidney Disease	52
Asthma	29
Osteoperosis	12
Atrial Fibrilation	28
Heart Failure	52
Chronic Obstructive Pulmonary Disease	51
Diabetes	45
Dementia	23
Cancer	15

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Keith Marcus, MD treated as an internist in Ludington, MI during 2016 were hospital care, inpatient care, outpatient care and stress testing.

Volume of procedures performed by Dr. Keith Marcus, MD for Medicare patients.

cardiac procedures	12
hospital care	969
inpatient care	930
outpatient care	39
stress testing	12

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Keith Marcus, MD.

**Gender**
Male	261
Female	319

**Ethnicity**
Non-Hispanic White	556
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	178
From 75 to 84	179
85 and over	126
Less than 65	97

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2016

Hypertension	75
High Cholesterol	69
Stroke	13
Ischemic Heart Disease	60
Depression	42
Chronic Kidney Disease	59
Asthma	48
Osteoperosis	12
Atrial Fibrilation	24
Heart Failure	50
Chronic Obstructive Pulmonary Disease	48
Diabetes	43
Dementia	24
Cancer	18

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Keith Marcus, MD treated as an internist in Ludington, MI during 2017 were hospital care, inpatient care, outpatient care and stress testing.

Volume of procedures performed by Dr. Keith Marcus, MD for Medicare patients.

cardiac procedures	39
hospital care	1016
inpatient care	958
outpatient care	58
stress testing	39

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Keith Marcus, MD.

**Gender**
Male	204
Female	230

**Ethnicity**
Non-Hispanic White	414
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	125
From 75 to 84	145
85 and over	106
Less than 65	58

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2017

Hypertension	75
High Cholesterol	69
Stroke	11
Ischemic Heart Disease	60
Depression	43
Chronic Kidney Disease	57
Asthma	8
Osteoperosis	14
Atrial Fibrilation	29
Heart Failure	52
Chronic Obstructive Pulmonary Disease	47
Diabetes	46
Dementia	26
Cancer	19

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Keith Marcus, MD treated as an internist in Ludington, MI during 2018 were hospital care, inpatient care, outpatient care and stress testing.

Volume of procedures performed by Dr. Keith Marcus, MD for Medicare patients.

cardiac procedures	21
hospital care	877
inpatient care	826
outpatient care	51
stress testing	21

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Keith Marcus, MD.

**Gender**
Male	161
Female	188

**Ethnicity**
Non-Hispanic White	333
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	104
From 75 to 84	112
85 and over	76
Less than 65	57

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2018

Hypertension	75
High Cholesterol	74
Stroke	11
Ischemic Heart Disease	60
Depression	43
Chronic Kidney Disease	60
Asthma	8
Osteoperosis	15
Atrial Fibrilation	28
Heart Failure	56
Chronic Obstructive Pulmonary Disease	50
Diabetes	42
Dementia	28
Cancer	16

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Keith Marcus, MD treated as an internist in Ludington, MI during 2019 were hospital care, inpatient care and outpatient care.

Volume of procedures performed by Dr. Keith Marcus, MD for Medicare patients.

hospital care	650
inpatient care	590
outpatient care	60

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Keith Marcus, MD.

**Gender**
Male	128
Female	158

**Ethnicity**
Non-Hispanic White	266
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	81
From 75 to 84	96
85 and over	70
Less than 65	39

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2019

Hypertension	75
High Cholesterol	72
Stroke	17
Ischemic Heart Disease	58
Depression	46
Chronic Kidney Disease	59
Asthma	10
Osteoperosis	15
Atrial Fibrilation	32
Heart Failure	52
Chronic Obstructive Pulmonary Disease	47
Diabetes	43
Dementia	29
Cancer	19

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Keith Marcus, MD treated as an internist in Ludington, MI during 2020 were hospital care, inpatient care and outpatient care.

Volume of procedures performed by Dr. Keith Marcus, MD for Medicare patients.

hospital care	626
inpatient care	584
outpatient care	42

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Keith Marcus, MD.

**Gender**
Male	89
Female	129

**Ethnicity**
Non-Hispanic White	207
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	64
From 75 to 84	70
85 and over	56
Less than 65	28

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2020

Hypertension	75
High Cholesterol	68
Stroke	13
Ischemic Heart Disease	53
Depression	47
Chronic Kidney Disease	63
Asthma	8
Osteoperosis	19
Atrial Fibrilation	28
Heart Failure	49
Chronic Obstructive Pulmonary Disease	42
Diabetes	40
Dementia	32
Cancer	19

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Keith Marcus, MD treated as an internist in Ludington, MI during 2021 were hospital care, inpatient care and outpatient care.

Volume of procedures performed by Dr. Keith Marcus, MD for Medicare patients.

hospital care	408
inpatient care	392
outpatient care	16

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Keith Marcus, MD.

**Gender**
Male	84
Female	106

**Age**
From 65 to 74	49
From 75 to 84	53
85 and over	61
Less than 65	27

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2021

Hypertension	75
High Cholesterol	74
Stroke	15
Ischemic Heart Disease	53
Depression	43
Chronic Kidney Disease	65
Asthma	8
Osteoperosis	18
Atrial Fibrilation	23
Heart Failure	49
Chronic Obstructive Pulmonary Disease	42
Diabetes	43
Dementia	36
Cancer	21

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Keith Marcus, MD treated as an internist in Ludington, MI during 2022 were hospital care, inpatient care and outpatient care.

Volume of procedures performed by Dr. Keith Marcus, MD for Medicare patients.

hospital care	375
inpatient care	361
outpatient care	14

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Keith Marcus, MD.

**Gender**
Male	78
Female	99

**Ethnicity**
Non-Hispanic White	165
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	50
From 75 to 84	62
85 and over	46
Less than 65	19

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	18
Ischemic Heart Disease	43
Depression	44
Chronic Kidney Disease	42
Asthma	6
Osteoperosis	17
Atrial Fibrilation	42
Heart Failure	49
Chronic Obstructive Pulmonary Disease	49
Diabetes	38
Dementia	23
Cancer	24

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Keith Marcus, MD treated as an internist in Ludington, MI during 2023 were hospital care and inpatient care.

Volume of procedures performed by Dr. Keith Marcus, MD for Medicare patients.

hospital care	242
inpatient care	242

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Keith Marcus, MD.

**Gender**
Male	51
Female	66

**Age**
From 65 to 74	34
From 75 to 84	44
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2023

Hypertension	75
High Cholesterol	75
Stroke	20
Ischemic Heart Disease	43
Depression	43
Chronic Kidney Disease	44
Asthma	9
Osteoperosis	18
Atrial Fibrilation	48
Heart Failure	52
Chronic Obstructive Pulmonary Disease	49
Diabetes	47
Dementia	23
Cancer	26

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Keith Marcus, MD treated as an internist in Ludington, MI during 2024 were hospital care, inpatient care, stress testing and cardiac procedures.

Volume of procedures performed by Dr. Keith Marcus, MD for Medicare patients.

cardiac procedures	20
hospital care	146
inpatient care	146
stress testing	20

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Keith Marcus, MD.

**Gender**
Male	52
Female	58

**Age**
From 65 to 74	32
From 75 to 84	39
85 and over	27
Less than 65	12

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2024

Hypertension	75
High Cholesterol	73
Stroke	24
Ischemic Heart Disease	36
Depression	45
Chronic Kidney Disease	37
Asthma	12
Osteoperosis	22
Atrial Fibrilation	30
Heart Failure	39
Chronic Obstructive Pulmonary Disease	27
Diabetes	37
Dementia	25
Cancer	24

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Keith Marcus, MD for Medicare patients.

The highest averages for the top procedures that Dr. Keith Marcus, MD treated as an internist in Ludington, MI were hospital care, inpatient care, outpatient care and stress testing.

cardiac procedures	19
hospital care	692
inpatient care	654
outpatient care	45
stress testing	19

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Keith Marcus, MD.

**Gender**
Male	160
Female	188

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	185
Hispanic	0
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	113
85 and over	76
Less than 65	55
65 to 74	100

Average of Total of Conditions of Medicare patients treated by Dr. Keith Marcus, MD From 2012 - 2024

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

Hypertension	69
High Cholesterol	65
Stroke	13
Ischemic Heart Disease	49
Depression	39
Chronic Kidney Disease	49
Asthma	13
Osteoporosis	14
Heart Failure	46
Chronic Obstructive Pulmonary Disease	41
Diabetes	39
Atrial Fibrillation	28
Cancer	18
Dementia	23

Education & Training

He has a state license in Michigan.

Licensed In: Michigan

Ratings & Reviews

Dr. Keith Marcus, MD has a high overall rating with an average of 4.0 out of 5 stars based on 1 ratings. We collect ratings and reviews of Dr. Keith Marcus, MD from all over the web to help you find the right in Ludington, MI.

Overall Rating

(1 Rating)

Leave a Review

General Payments

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

**Payments by Company**
AbbVie Inc.	$68,343 BOTOX $13,996	KYBELLA $1,950	$52,396
Galderma Laboratories, L.P.	$1,664 DYSPORT $289	$1,375
Merz Pharmaceuticals GmbH	$1,239 The Cellfina System $1,239
Allergan, Inc.	$148 BOTOX $148
Endo Pharmaceuticals Inc.	$96 $96
Other	$149 COMBIVENT RESPIMAT $31	Xeomin $28	Lonhala Magnair $25	Spiriva $24	ELIQUIS $21	Other $19

**Types of Payments**
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$65,250
Food and Beverage	$3,264
Travel and Lodging	$3,100
Education	$25

Research Payments

Dr. Keith Marcus, MD has received 21 research payments totaling $575,410.

Ownership and Interest Payments

This table describes ownership payments received by Dr. Keith Marcus, MD.

Arya Medical, Inc.	2024	$25.00	Physician Covered Recipient	Common Stock
Arya Medical, Inc.	2022	$25.00	Physician Covered Recipient	Common Stock
Arya Medical, Inc.	2021	$25.00	Physician Covered Recipient	Common Stock

Biography

Dr. Keith Marcus is a Ludington, MI physician who specializes in hospital medicine (hospitalist). Dr. Marcus has obtained a license to practice in Michigan.

Select Year:

Dr. Keith Marcus, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Keith Marcus, MD in 2024

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. Keith Marcus, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2023

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

2024 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Keith Marcus, MD in 2024

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Average Medicare Patient Data From 2012 - 2024

Average of Total of Conditions of Medicare patients treated by Dr. Keith Marcus, MD From 2012 - 2024

Education & Training

Ratings & Reviews

General Payments

Research Payments

Ownership and Interest Payments

Biography

Internists & Internal Medicine Doctors in Nearby Locations

Other Providers in Ludington, MI