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Dr. Johnathon Toma Markus, MD

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Specializes in: Gastroenterology (Digestive System)

Wayne State University School of Medicine (2012)

37399 Garfield Suite 104
Clinton Township, MI 48036

(586) 286-5400

Dr. Johnathon Toma Markus, MD is a gastroenterologist in Clinton Township, MI specializing in gastroenterology (digestive system). He graduated from Wayne State University School of Medicine in 2012 and has 14 years of experience. Dr. Johnathon Toma Markus, MD is affiliated with McLaren Health Care and TRI-COUNTY GASTROENTEROLOGY, PC.

Office Locations

37399 Garfield Road Suite 104
Clinton Township, MI 48036

(586) 569-3379

(586) 576-6264

open_in_new

McLaren Health Care

37399 Garfield Suite 104
Clinton Township, MI 48036

(586) 286-5400

(586) 576-6263

open_in_new

Noteworthy Medicare Patient Procedures Performed by Dr. Johnathon Toma Markus, MD in 2023

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

Top 10%

By Affordability:

diagnostic EGD

diagnostic EGD without biopsy

diagnostic upper endoscopy

EGD with biopsy

EGD with lesion removal

esophagogastroduodenoscopy

therapeutic EGD

therapeutic upper endoscopy

upper endoscopy

upper endoscopy with biopsy

upper endoscopy with lesion removal

In 2023, Dr. Johnathon Toma Markus, MD had a list price for diagnostic EGD, diagnostic EGD without biopsy, diagnostic upper endoscopy, EGD with biopsy, EGD with lesion removal, esophagogastroduodenoscopy (EGD), therapeutic EGD, therapeutic upper endoscopy, upper endoscopy, upper endoscopy with biopsy, and upper endoscopy with lesion removal 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.

Top 25%

By Volume:

colonoscopy with biopsy

colonoscopy with lesion removal

gastrointestinal biopsy

removal of lesion

By Affordability:

hospital care

inpatient care

inpatient hospital care

In 2013, among providers in related specialties within Michigan, Dr. Johnathon Toma Markus, MD performed more colonoscopy with biopsy, colonoscopy with lesion removal, gastrointestinal biopsy, and removal of lesion (e.g. growth) procedures for Medicare patients than 75% of them and he also 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 75% of them. 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

2017 Medicare Procedure Volume

Volume of procedures performed by Dr. Johnathon Toma Markus, MD for Medicare patients.

doctor visit	12

Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD in 2017

The most common conditions of Medicare patients that Dr. Johnathon Toma Markus, MD treated during 2017 were hypertension and diabetes.

Hypertension	75
High Cholesterol	0
Stroke	0
Ischemic Heart Disease	0
Depression	0
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	57
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Johnathon Toma Markus, MD treated as a gastroenterologist in Clinton Township, MI during 2018 were hospital care, inpatient care, removal of lesion (e.g. growth) and minimally invasive procedures.

Volume of procedures performed by Dr. Johnathon Toma Markus, MD for Medicare patients.

diagnostic procedures	130
doctor visit	56
gastrointestinal procedures	130
hospital care	154
inpatient care	154
minimally invasive procedures	130
removal of lesion (e.g. growth)	130

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Johnathon Toma Markus, MD.

**Gender**
Male	100
Female	156

**Ethnicity**
Non-Hispanic White	218
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	101
From 75 to 84	62
85 and over	36
Less than 65	57

Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD in 2018

The most common conditions of Medicare patients that Dr. Johnathon Toma Markus, MD treated during 2018 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	75
High Cholesterol	64
Stroke	10
Ischemic Heart Disease	57
Depression	39
Chronic Kidney Disease	54
Asthma	14
Osteoperosis	7
Atrial Fibrilation	22
Heart Failure	42
Chronic Obstructive Pulmonary Disease	39
Diabetes	45
Dementia	26
Cancer	17

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Johnathon Toma Markus, MD treated as a gastroenterologist in Clinton Township, MI during 2019 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Johnathon Toma Markus, MD for Medicare patients.

diagnostic procedures	265
doctor visit	156
gastrointestinal procedures	318
hospital care	305
inpatient care	305
minimally invasive procedures	318
preventive care	12
removal of lesion (e.g. growth)	265

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Johnathon Toma Markus, MD.

**Gender**
Male	199
Female	267

**Ethnicity**
Non-Hispanic White	403
Black	48
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	176
From 75 to 84	113
85 and over	58
Less than 65	119

Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD in 2019

The most common conditions of Medicare patients that Dr. Johnathon Toma Markus, MD treated during 2019 were hypertension, high cholesterol, chronic kidney disease and ischemic heart disease.

Hypertension	75
High Cholesterol	63
Stroke	8
Ischemic Heart Disease	58
Depression	41
Chronic Kidney Disease	58
Asthma	12
Osteoperosis	9
Atrial Fibrilation	20
Heart Failure	39
Chronic Obstructive Pulmonary Disease	38
Diabetes	42
Dementia	24
Cancer	16

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Johnathon Toma Markus, MD treated as a gastroenterologist in Clinton Township, MI during 2020 were hospital care, inpatient care, minimally invasive procedures and gastrointestinal procedures.

Volume of procedures performed by Dr. Johnathon Toma Markus, MD for Medicare patients.

diagnostic procedures	170
doctor visit	54
gastrointestinal procedures	192
hospital care	234
inpatient care	234
minimally invasive procedures	192
preventive care	11
removal of lesion (e.g. growth)	170

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Johnathon Toma Markus, MD.

**Gender**
Male	139
Female	200

**Ethnicity**
Non-Hispanic White	292
Black	32
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	125
From 75 to 84	88
85 and over	40
Less than 65	86

Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD in 2020

The most common conditions of Medicare patients that Dr. Johnathon Toma Markus, MD treated during 2020 were hypertension, high cholesterol, chronic kidney disease and ischemic heart disease.

Hypertension	75
High Cholesterol	65
Stroke	9
Ischemic Heart Disease	59
Depression	43
Chronic Kidney Disease	60
Asthma	10
Osteoperosis	10
Atrial Fibrilation	18
Heart Failure	39
Chronic Obstructive Pulmonary Disease	38
Diabetes	39
Dementia	26
Cancer	15

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Johnathon Toma Markus, MD treated as a gastroenterologist in Clinton Township, MI during 2021 were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. Johnathon Toma Markus, MD for Medicare patients.

diagnostic procedures	245
doctor visit	132
gastrointestinal procedures	297
hospital care	274
inpatient care	274
minimally invasive procedures	297
preventive care	29
removal of lesion (e.g. growth)	245

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Johnathon Toma Markus, MD.

**Gender**
Male	212
Female	284

**Ethnicity**
Non-Hispanic White	423
Black	56
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	200
From 75 to 84	131
85 and over	65
Less than 65	100

Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD in 2021

The most common conditions of Medicare patients that Dr. Johnathon Toma Markus, MD treated during 2021 were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	75
High Cholesterol	62
Stroke	11
Ischemic Heart Disease	56
Depression	37
Chronic Kidney Disease	55
Asthma	12
Osteoperosis	7
Atrial Fibrilation	21
Heart Failure	38
Chronic Obstructive Pulmonary Disease	32
Diabetes	44
Dementia	25
Cancer	14

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Johnathon Toma Markus, MD treated as a gastroenterologist in Clinton Township, MI during 2022 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Johnathon Toma Markus, MD for Medicare patients.

diagnostic procedures	251
doctor visit	94
gastrointestinal procedures	326
hospital care	236
inpatient care	236
minimally invasive procedures	326
preventive care	41
removal of lesion (e.g. growth)	251

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Johnathon Toma Markus, MD.

**Gender**
Male	237
Female	248

**Ethnicity**
Non-Hispanic White	439
Black	27
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	216
From 75 to 84	130
85 and over	55
Less than 65	84

Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD in 2022

The most common conditions of Medicare patients that Dr. Johnathon Toma Markus, MD treated during 2022 were high cholesterol, hypertension, ischemic heart disease and diabetes.

Hypertension	75
High Cholesterol	75
Stroke	15
Ischemic Heart Disease	44
Depression	27
Chronic Kidney Disease	35
Asthma	13
Osteoperosis	11
Atrial Fibrilation	26
Heart Failure	30
Chronic Obstructive Pulmonary Disease	35
Diabetes	42
Dementia	13
Cancer	17

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Johnathon Toma Markus, MD treated as a gastroenterologist in Clinton Township, MI during 2023 were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. Johnathon Toma Markus, MD for Medicare patients.

diagnostic procedures	219
doctor visit	51
gastrointestinal procedures	234
hospital care	175
inpatient care	175
minimally invasive procedures	234
removal of lesion (e.g. growth)	219

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Johnathon Toma Markus, MD.

**Gender**
Male	174
Female	199

**Ethnicity**
Non-Hispanic White	334
Black	21
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	168
From 75 to 84	103
85 and over	45
Less than 65	57

Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD in 2023

The most common conditions of Medicare patients that Dr. Johnathon Toma Markus, MD treated during 2023 were high cholesterol, hypertension, ischemic heart disease and diabetes.

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	40
Depression	28
Chronic Kidney Disease	33
Asthma	10
Osteoperosis	12
Atrial Fibrilation	29
Heart Failure	24
Chronic Obstructive Pulmonary Disease	25
Diabetes	38
Dementia	13
Cancer	17

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2017 - 2023

Volume of procedures performed by Dr. Johnathon Toma Markus, MD for Medicare patients.

The highest averages for the top procedures that Dr. Johnathon Toma Markus, MD treated as a gastroenterologist in Clinton Township, MI were minimally invasive procedures, gastrointestinal procedures, hospital care and inpatient care.

diagnostic procedures	213
doctor visit	79
gastrointestinal procedures	249
hospital care	229
inpatient care	229
minimally invasive procedures	249
preventive care	23
removal of lesion (e.g. growth)	213

Average Medicare Patient Data From 2017 - 2023

Information about Medicare patients treated by Dr. Johnathon Toma Markus, MD.

**Gender**
Female	193
Male	151

**Ethnicity**
Black / African American	26
Asian / Pacific Islander	0
Non-Hispanic White	301
Hispanic	0
Native American / Alaskan Native	0
Other	0

**Age**
85 and over	42
75 to 84	89
Less than 65	71
65 to 74	140

Average of Total of Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD From 2017 - 2023

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

Hypertension	75
High Cholesterol	57
Stroke	9
Ischemic Heart Disease	44
Depression	30
Chronic Kidney Disease	42
Asthma	10
Osteoporosis	8
Heart Failure	30
Chronic Obstructive Pulmonary Disease	29
Diabetes	43
Atrial Fibrillation	19
Cancer	13
Dementia	18

Education & Training

Dr. Johnathon Toma Markus, MD graduated from Wayne State University School of Medicine in 2012. He completed residency at Cleveland Clinic. He is certified by the American Board of Internal Medicine and has a state license in Michigan.

Medical School: Wayne State University School of Medicine (2012)

Residency: Cleveland Clinic

Board Certification: American Board of Internal Medicine (2015)

Licensed In: Michigan

Affiliations & Hospitals

Dr. Johnathon Toma Markus, MD is associated with these hospitals and organizations:

McLaren Health Care

TRI-COUNTY GASTROENTEROLOGY, PC

Ratings & Reviews

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General Payments

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

**Payments by Company**
AbbVie Inc.	$2,056 Mavyret $451	Skyrizi $436	Rinvoq $358	Humira $324	LINZESS $252	Other $235
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$1,285 XIFAXAN $882	PLENVU $205	Trulance $156	Cycloset $42
Takeda Pharmaceuticals U.S.A., Inc.	$1,156 ENTYVIO $709	GATTEX $218	MOTEGRITY $75	AMITIZA $75	Dexilant $13	Other $66
Janssen Biotech, Inc.	$1,057 STELARA $831	REMICADE $193	SIMPONI ARIA $33
Pfizer Inc.	$574 XELJANZ $300	PAXLOVID $141	INFLECTRA $133
Other	$4,239 DUPIXENT $637	ZEPOSIA $391	IBSRELA $292	SUCRAID $274	Mavyret $270	Other $2,375

**Types of Payments**
Food and Beverage	$10,017
Education	$260
Gift	$90

Biography

Dr. Johnathon Markus' specialty is gastroenterology (digestive system). Dr. Markus studied medicine at Wayne State University School of Medicine. His training includes a residency program at Cleveland Clinic. He is professionally affiliated with McLaren Health Care. His practice in Clinton Township, MI is open to new patients as reported by McLaren Health Care.

Select Year:

Dr. Johnathon Toma Markus, MD

Office Locations

Noteworthy Medicare Patient Procedures Performed by Dr. Johnathon Toma Markus, MD in 2023

By Affordability:

By Volume:

By Affordability:

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD in 2023

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2017 - 2023

Average Medicare Patient Data From 2017 - 2023

Average of Total of Conditions of Medicare patients treated by Dr. Johnathon Toma Markus, MD From 2017 - 2023

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Biography