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Dr. Mark W. Li, MD

Accepting New Patients

(15 Ratings)

Specializes in: Adult Gastroenterology

University of Illinois College of Medicine at Chicago

2440 S Hacienda Boulevard Suite 105
Hacienda Heights, CA 91745

(626) 330-6003

Dr. Mark W. Li, MD is a gastroenterologist in Montebello, CA specializing in adult gastroenterology. He graduated from University of Illinois College of Medicine at Chicago. Dr. Mark W. Li, MD is affiliated with AHMC Healthcare, Astrana Health, Allied Pacific IPA and MARK W. LI, M.D..

Office Locations

2101 W Beverly Boulevard
Montebello, CA 90640

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MARK W. LI, M.D.

2440 S Hacienda Boulevard Suite 105
Hacienda Heights, CA 91745

(626) 330-6003

(626) 330-8474

open_in_new

2440 S Hacienda Boulevard Suite 105
Hacienda Heights, CA 91745

(626) 330-6003

(626) 330-8474

open_in_new

Noteworthy Medicare Patient Procedures Performed by Dr. Mark W. Li, MD in 2024

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

Top 5%

By Affordability:

nursing home care

In 2024, Dr. Mark W. Li, MD had a list price for nursing home care that was lower than the list prices billed to Medicare by 95% of providers in related specialties within California. 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:

biopsy

colonoscopy with lesion removal

diagnostic procedures

gastrointestinal biopsy

removal of lesion

therapeutic colonoscopy

therapeutic endoscopy

In 2024, Dr. Mark W. Li, MD had a list price for biopsy, colonoscopy with lesion removal, diagnostic procedures, gastrointestinal biopsy, removal of lesion (e.g. growth), therapeutic colonoscopy, and therapeutic endoscopy that was lower than the list prices billed to Medicare by 90% of providers in related specialties within California. 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 Affordability:

colon biopsy

colonoscopy

colonoscopy with biopsy

diagnostic colonoscopy

diagnostic EGD

diagnostic endoscopy

diagnostic upper endoscopy

EGD with biopsy

EGD with lesion removal

endoscopy

esophagogastroduodenoscopy

gastrointestinal endoscopy

gastrointestinal procedures

lower endoscopy

minimally invasive procedures

therapeutic EGD

therapeutic upper endoscopy

upper endoscopy

upper endoscopy with biopsy

upper endoscopy with lesion removal

In 2012, Dr. Mark W. Li, MD had a list price for colon biopsy, colonoscopy, colonoscopy with biopsy, diagnostic colonoscopy, diagnostic EGD, diagnostic endoscopy, diagnostic upper endoscopy, EGD with biopsy, EGD with lesion removal, endoscopy, esophagogastroduodenoscopy (EGD), gastrointestinal (GI) endoscopy, gastrointestinal procedures, lower endoscopy, minimally invasive procedures, 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 75% of providers in related specialties within California. 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. Mark W. Li, MD treated as a gastroenterologist in Montebello, CA during 2012 were inpatient care, hospital care, nursing home care and gastrointestinal procedures.

Volume of procedures performed by Dr. Mark W. Li, MD for Medicare patients.

anastomosis	19
catheterization	19
diagnostic procedures	227
doctor visit	1756
gastrointestinal procedures	300
hospital care	1393
inpatient care	1393
minimally invasive procedures	300
nursing home care	482
preventive care	84
removal of lesion (e.g. growth)	227
skin testing	11
tuberculosis (TB) testing	11
vaccines	30

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Mark W. Li, MD treated as a gastroenterologist in Montebello, CA during 2013 were hospital care, inpatient care, nursing home care and minimally invasive procedures.

Volume of procedures performed by Dr. Mark W. Li, MD for Medicare patients.

diagnostic procedures	205
doctor visit	1591
gastrointestinal procedures	229
hospital care	1394
inpatient care	1394
minimally invasive procedures	229
nursing home care	473
preventive care	59
removal of lesion (e.g. growth)	205
vaccines	35

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark W. Li, MD.

**Gender**
Male	189
Female	270

**Ethnicity**
Non-Hispanic White	150
Black	21
Hispanic	164
Asian	109
Other	0
Native American	0

**Age**
From 65 to 74	143
From 75 to 84	106
85 and over	80
Less than 65	130

Conditions of Medicare patients treated by Dr. Mark W. Li, MD in 2013

Hypertension	73
High Cholesterol	37
Stroke	5
Ischemic Heart Disease	42
Depression	22
Chronic Kidney Disease	27
Asthma	7
Osteoperosis	13
Atrial Fibrilation	9
Heart Failure	27
Chronic Obstructive Pulmonary Disease	15
Diabetes	43
Dementia	21
Cancer	9

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Mark W. Li, MD treated as a gastroenterologist in Montebello, CA during 2014 were hospital care, inpatient care, nursing home care and minimally invasive procedures.

Volume of procedures performed by Dr. Mark W. Li, MD for Medicare patients.

anastomosis	18
catheterization	18
diagnostic procedures	195
doctor visit	1394
gastrointestinal procedures	241
hospital care	1303
inpatient care	1303
minimally invasive procedures	241
nursing home care	452
preventive care	58
removal of lesion (e.g. growth)	195
vaccines	30

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark W. Li, MD.

**Gender**
Male	185
Female	282

**Ethnicity**
Non-Hispanic White	155
Black	13
Hispanic	161
Asian	127
Other	0
Native American	0

**Age**
From 65 to 74	161
From 75 to 84	110
85 and over	73
Less than 65	123

Conditions of Medicare patients treated by Dr. Mark W. Li, MD in 2014

Hypertension	67
High Cholesterol	44
Stroke	4
Ischemic Heart Disease	40
Depression	18
Chronic Kidney Disease	27
Asthma	9
Osteoperosis	15
Atrial Fibrilation	6
Heart Failure	26
Chronic Obstructive Pulmonary Disease	15
Diabetes	44
Dementia	21
Cancer	8

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Mark W. Li, MD treated as a gastroenterologist in Montebello, CA during 2015 were hospital care, inpatient care, nursing home care and minimally invasive procedures.

Volume of procedures performed by Dr. Mark W. Li, MD for Medicare patients.

diagnostic procedures	237
doctor visit	1478
gastrointestinal procedures	249
hospital care	1032
inpatient care	1032
minimally invasive procedures	249
nursing home care	344
preventive care	44
removal of lesion (e.g. growth)	237
vaccines	32

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark W. Li, MD.

**Gender**
Male	380
Female	474

**Ethnicity**
Non-Hispanic White	280
Black	30
Hispanic	258
Asian	258
Other	0
Native American	0

**Age**
From 65 to 74	302
From 75 to 84	204
85 and over	140
Less than 65	208

Conditions of Medicare patients treated by Dr. Mark W. Li, MD in 2015

Hypertension	69
High Cholesterol	46
Stroke	5
Ischemic Heart Disease	39
Depression	20
Chronic Kidney Disease	30
Asthma	15
Osteoperosis	13
Atrial Fibrilation	11
Heart Failure	26
Chronic Obstructive Pulmonary Disease	15
Diabetes	39
Dementia	21
Cancer	9

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Mark W. Li, MD treated as a gastroenterologist in Montebello, CA during 2016 were hospital care, inpatient care, nursing home care and minimally invasive procedures.

Volume of procedures performed by Dr. Mark W. Li, MD for Medicare patients.

anastomosis	18
catheterization	18
diagnostic procedures	261
doctor visit	1462
gastrointestinal procedures	279
hospital care	1613
inpatient care	1613
minimally invasive procedures	279
nursing home care	299
preventive care	13
removal of lesion (e.g. growth)	261
vaccines	13

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark W. Li, MD.

**Gender**
Male	215
Female	256

**Ethnicity**
Non-Hispanic White	150
Black	16
Hispanic	125
Asian	165
Other	0
Native American	0

**Age**
From 65 to 74	156
From 75 to 84	120
85 and over	82
Less than 65	113

Conditions of Medicare patients treated by Dr. Mark W. Li, MD in 2016

Hypertension	69
High Cholesterol	47
Stroke	7
Ischemic Heart Disease	42
Depression	25
Chronic Kidney Disease	39
Asthma	26
Osteoperosis	15
Atrial Fibrilation	14
Heart Failure	29
Chronic Obstructive Pulmonary Disease	24
Diabetes	44
Dementia	27
Cancer	10

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Mark W. Li, MD treated as a gastroenterologist in Montebello, CA during 2017 were hospital care, inpatient care, nursing home care and minimally invasive procedures.

Volume of procedures performed by Dr. Mark W. Li, MD for Medicare patients.

anastomosis	23
catheterization	23
diagnostic procedures	245
doctor visit	1103
gastrointestinal procedures	268
hospital care	1421
inpatient care	1421
minimally invasive procedures	268
nursing home care	270
removal of lesion (e.g. growth)	245

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark W. Li, MD.

**Gender**
Male	223
Female	260

**Ethnicity**
Non-Hispanic White	147
Black	23
Hispanic	125
Asian	174
Other	0
Native American	0

**Age**
From 65 to 74	156
From 75 to 84	128
85 and over	87
Less than 65	112

Conditions of Medicare patients treated by Dr. Mark W. Li, MD in 2017

Hypertension	71
High Cholesterol	47
Stroke	6
Ischemic Heart Disease	43
Depression	25
Chronic Kidney Disease	43
Asthma	6
Osteoperosis	19
Atrial Fibrilation	13
Heart Failure	30
Chronic Obstructive Pulmonary Disease	26
Diabetes	47
Dementia	34
Cancer	9

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Mark W. Li, MD treated as a gastroenterologist in Montebello, CA during 2018 were hospital care, inpatient care, nursing home care and minimally invasive procedures.

Volume of procedures performed by Dr. Mark W. Li, MD for Medicare patients.

anastomosis	19
catheterization	19
diagnostic procedures	163
doctor visit	1115
gastrointestinal procedures	182
hospital care	1236
inpatient care	1236
minimally invasive procedures	182
nursing home care	326
removal of lesion (e.g. growth)	163

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark W. Li, MD.

**Gender**
Male	189
Female	214

**Ethnicity**
Non-Hispanic White	129
Black	17
Hispanic	119
Asian	127
Other	11
Native American	0

**Age**
From 65 to 74	128
From 75 to 84	97
85 and over	63
Less than 65	115

Conditions of Medicare patients treated by Dr. Mark W. Li, MD in 2018

Hypertension	73
High Cholesterol	52
Stroke	7
Ischemic Heart Disease	43
Depression	23
Chronic Kidney Disease	43
Asthma	7
Osteoperosis	17
Atrial Fibrilation	10
Heart Failure	28
Chronic Obstructive Pulmonary Disease	22
Diabetes	45
Dementia	32
Cancer	9

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Mark W. Li, MD treated as a gastroenterologist in Montebello, CA during 2019 were hospital care, inpatient care, nursing home care and removal of lesion (e.g. growth).

Volume of procedures performed by Dr. Mark W. Li, MD for Medicare patients.

diagnostic procedures	150
doctor visit	950
gastrointestinal procedures	150
hospital care	1190
inpatient care	1190
minimally invasive procedures	150
nursing home care	359
removal of lesion (e.g. growth)	150

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark W. Li, MD.

**Gender**
Male	146
Female	176

**Ethnicity**
Non-Hispanic White	103
Black	0
Hispanic	90
Asian	115
Other	0
Native American	0

**Age**
From 65 to 74	129
From 75 to 84	68
85 and over	45
Less than 65	80

Conditions of Medicare patients treated by Dr. Mark W. Li, MD in 2019

Hypertension	71
High Cholesterol	45
Stroke	5
Ischemic Heart Disease	37
Depression	18
Chronic Kidney Disease	39
Asthma	8
Osteoperosis	12
Atrial Fibrilation	9
Heart Failure	25
Chronic Obstructive Pulmonary Disease	20
Diabetes	41
Dementia	25
Cancer	11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Mark W. Li, MD treated as a gastroenterologist in Montebello, CA during 2020 were hospital care, inpatient care, nursing home care and removal of lesion (e.g. growth).

Volume of procedures performed by Dr. Mark W. Li, MD for Medicare patients.

diagnostic procedures	97
doctor visit	836
gastrointestinal procedures	97
hospital care	533
inpatient care	533
minimally invasive procedures	97
nursing home care	216
removal of lesion (e.g. growth)	97

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark W. Li, MD.

**Gender**
Male	113
Female	142

**Ethnicity**
Non-Hispanic White	75
Black	0
Hispanic	64
Asian	100
Other	0
Native American	0

**Age**
From 65 to 74	102
From 75 to 84	60
85 and over	34
Less than 65	59

Conditions of Medicare patients treated by Dr. Mark W. Li, MD in 2020

Hypertension	65
High Cholesterol	47
Stroke	5
Ischemic Heart Disease	35
Depression	15
Chronic Kidney Disease	35
Asthma	0
Osteoperosis	14
Atrial Fibrilation	7
Heart Failure	22
Chronic Obstructive Pulmonary Disease	11
Diabetes	37
Dementia	24
Cancer	11

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Mark W. Li, MD treated as a gastroenterologist in Montebello, CA during 2021 were nursing home care, removal of lesion (e.g. growth), minimally invasive procedures and diagnostic procedures.

Volume of procedures performed by Dr. Mark W. Li, MD for Medicare patients.

diagnostic procedures	121
doctor visit	624
gastrointestinal procedures	121
minimally invasive procedures	121
nursing home care	183
removal of lesion (e.g. growth)	121

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark W. Li, MD.

**Gender**
Male	127
Female	115

**Ethnicity**
Non-Hispanic White	74
Black	0
Hispanic	53
Asian	100
Other	0
Native American	0

**Age**
From 65 to 74	108
From 75 to 84	53
85 and over	28
Less than 65	53

Conditions of Medicare patients treated by Dr. Mark W. Li, MD in 2021

Hypertension	74
High Cholesterol	50
Stroke	0
Ischemic Heart Disease	27
Depression	12
Chronic Kidney Disease	34
Asthma	5
Osteoperosis	14
Atrial Fibrilation	7
Heart Failure	19
Chronic Obstructive Pulmonary Disease	10
Diabetes	36
Dementia	19
Cancer	10

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Mark W. Li, MD treated as a gastroenterologist in Montebello, CA during 2022 were removal of lesion (e.g. growth), minimally invasive procedures, diagnostic procedures and gastrointestinal procedures.

Volume of procedures performed by Dr. Mark W. Li, MD for Medicare patients.

diagnostic procedures	161
doctor visit	657
gastrointestinal procedures	161
minimally invasive procedures	161
nursing home care	158
removal of lesion (e.g. growth)	161

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark W. Li, MD.

**Gender**
Male	116
Female	132

**Ethnicity**
Non-Hispanic White	74
Black	0
Hispanic	41
Asian	119
Other	0
Native American	0

**Age**
From 65 to 74	108
From 75 to 84	62
85 and over	28
Less than 65	50

Conditions of Medicare patients treated by Dr. Mark W. Li, MD in 2022

Hypertension	75
High Cholesterol	65
Stroke	5
Ischemic Heart Disease	17
Depression	12
Chronic Kidney Disease	20
Asthma	8
Osteoperosis	19
Atrial Fibrilation	10
Heart Failure	19
Chronic Obstructive Pulmonary Disease	10
Diabetes	33
Dementia	7
Cancer	15

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Mark W. Li, MD treated as a gastroenterologist in Montebello, CA during 2023 were removal of lesion (e.g. growth), minimally invasive procedures, diagnostic procedures and gastrointestinal procedures.

Volume of procedures performed by Dr. Mark W. Li, MD for Medicare patients.

diagnostic procedures	148
doctor visit	674
gastrointestinal procedures	148
minimally invasive procedures	148
nursing home care	140
removal of lesion (e.g. growth)	148

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark W. Li, MD.

**Gender**
Male	104
Female	124

**Ethnicity**
Non-Hispanic White	70
Black	0
Hispanic	38
Asian	106
Other	0
Native American	0

**Age**
From 65 to 74	110
From 75 to 84	54
85 and over	19
Less than 65	45

Conditions of Medicare patients treated by Dr. Mark W. Li, MD in 2023

Hypertension	75
High Cholesterol	65
Stroke	6
Ischemic Heart Disease	21
Depression	10
Chronic Kidney Disease	19
Asthma	8
Osteoperosis	23
Atrial Fibrilation	11
Heart Failure	18
Chronic Obstructive Pulmonary Disease	10
Diabetes	36
Dementia	9
Cancer	12

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Mark W. Li, MD treated as a gastroenterologist in Montebello, CA during 2024 were removal of lesion (e.g. growth), minimally invasive procedures, diagnostic procedures and gastrointestinal procedures.

Volume of procedures performed by Dr. Mark W. Li, MD for Medicare patients.

diagnostic procedures	168
doctor visit	534
gastrointestinal procedures	168
minimally invasive procedures	168
nursing home care	120
removal of lesion (e.g. growth)	168

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Mark W. Li, MD.

**Gender**
Male	105
Female	114

**Ethnicity**
Non-Hispanic White	67
Black	0
Hispanic	0
Asian	107
Other	0
Native American	0

**Age**
From 65 to 74	112
From 75 to 84	52
85 and over	14
Less than 65	41

Conditions of Medicare patients treated by Dr. Mark W. Li, MD in 2024

Hypertension	72
High Cholesterol	68
Stroke	0
Ischemic Heart Disease	17
Depression	11
Chronic Kidney Disease	25
Asthma	7
Osteoperosis	28
Atrial Fibrilation	9
Heart Failure	18
Chronic Obstructive Pulmonary Disease	13
Diabetes	33
Dementia	8
Cancer	13

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Mark W. Li, MD for Medicare patients.

The highest averages for the top procedures that Dr. Mark W. Li, MD treated as a gastroenterologist in Montebello, CA were inpatient care, hospital care, nursing home care and gastrointestinal procedures.

anastomosis	19
catheterization	19
diagnostic procedures	182
doctor visit	1090
gastrointestinal procedures	199
hospital care	1235
inpatient care	1235
minimally invasive procedures	199
nursing home care	294
preventive care	51
removal of lesion (e.g. growth)	182
skin testing	11
tuberculosis (TB) testing	11
vaccines	28

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Mark W. Li, MD.

**Gender**
Male	160
Female	196

**Ethnicity**
Black / African American	9
Asian / Pacific Islander	123
Non-Hispanic White	113
Hispanic	95
Native American / Alaskan Native	0
Other	0

**Age**
85 and over	53
75 to 84	85
Less than 65	86
65 to 74	131

Average of Total of Conditions of Medicare patients treated by Dr. Mark W. Li, MD From 2012 - 2024

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

Hypertension	65
High Cholesterol	47
Stroke	4
Ischemic Heart Disease	31
Depression	16
Chronic Kidney Disease	29
Asthma	8
Osteoporosis	15
Heart Failure	22
Chronic Obstructive Pulmonary Disease	14
Diabetes	36
Atrial Fibrillation	8
Cancer	9
Dementia	19

Education & Training

Dr. Mark W. Li, MD graduated from University of Illinois College of Medicine at Chicago. He completed residency at Edward Hines, Jr. VA Hospital. He is certified by the Certification: AMERICAN BOARD OF INTERNAL MEDICINE and has a state license in California.

Medical School: University of Illinois College of Medicine at Chicago

Residency: Edward Hines, Jr. VA Hospital

Board Certification: Certification: AMERICAN BOARD OF INTERNAL MEDICINE

Licensed In: California

Affiliations & Hospitals

Dr. Mark W. Li, MD is associated with these hospitals and organizations:

AHMC Healthcare

Astrana Health

Allied Pacific IPA

MARK W. LI, M.D.

Ratings & Reviews

Dr. Mark W. Li, MD has a high overall rating with an average of 4.3 out of 5 stars based on 15 ratings. We collect ratings and reviews of Dr. Mark W. Li, MD from all over the web to help you find the right in Montebello, CA.

4.3

Overall Rating

(15 Ratings)

Leave a Review

General Payments

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

**Payments by Company**
Gilead Sciences, Inc.	$6,568 Vemlidy $5,556	Epclusa $325	$687
AstraZeneca Pharmaceuticals LP	$4,232 FARXIGA $3,403	BYDUREON $420	MOVANTIK $157	BREZTRI $129	BRILINTA $109	Other $14
Gilead Sciences Inc	$3,544 Viread $1,620	Vemlidy $579	Harvoni $334	Epclusa $210	Sovaldi $90	Other $710
Amgen Inc.	$2,076 Repatha $757	Prolia $704	Aimovig $249	EVENITY $243	Corlanor $124
Kowa Pharmaceuticals America, Inc.	$1,389 LIVALO $959	Vascepa $200	Seglentis $170	BYSTOLIC $60
Other	$8,994 Creon $1,123	ZEPATIER $1,046	Vascepa $751	APTIOM $419	INVOKANA $419	Other $5,236

**Types of Payments**
Food and Beverage	$23,252
Consulting Fee	$2,439
Travel and Lodging	$899
Education	$213

Biography

Dr. Mark Li is an adult gastroenterology specialist in Hacienda Heights, CA. Dr. Li's average rating from his patients is 4.0 stars (out of 5). He is professionally affiliated with Astrana Health and AHMC Healthcare. According to Astrana Health, new patients are welcome to contact his office in HACIENDA HEIGHTS, CA. Dr. Li graduated from the University of Illinois College of Medicine at Chicago. He trained at Edward Hines, Jr. VA Hospital for residency. He is conversant in Chinese.