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Dr. William M. Farmer, DO

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Specializes in: Adult Gastroenterology and Emergency Medicine

Kansas City University of Medicine and Biosciences (KCUMB), College of Osteopathic Medicine (2002)

100 Methodist Boulevard
Hattiesburg, MS 39402

(601) 268-5185

Dr. William M. Farmer, DO is a gastroenterologist in Hattiesburg, MS specializing in adult gastroenterology and emergency medicine. He graduated from Kansas City University of Medicine and Biosciences (KCUMB), College of Osteopathic Medicine in 2002 and has 24 years of experience. Dr. William M. Farmer, DO is affiliated with Merit Health and GASTROINTESTINAL ASSOCIATES PA.

Office Locations

Merit Health

100 Methodist Boulevard
Hattiesburg, MS 39402

(601) 268-5185

(601) 268-5006

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Noteworthy Medicare Patient Procedures Performed by Dr. William M. Farmer, DO in 2023

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

Top 5%

By Affordability:

screening fecal occult blood test

screening stool guaiac test

In 2023, Dr. William M. Farmer, DO had a list price for screening fecal occult blood test (FOBT), and screening stool guaiac test (gFOBT) that was lower than the list prices billed to Medicare by 95% of providers in related specialties within Mississippi. 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 Volume:

ultrasound

In 2023, Dr. William M. Farmer, DO performed more ultrasound (sonogram) procedures for Medicare patients than 90% of providers in related specialties within Mississippi.

Top 25%

By Volume:

complete abdominal ultrasound

FibroScan

By Affordability:

chronic care

fecal occult blood test

stool guaiac test

stool tests

In 2012, among providers in related specialties within Mississippi, Dr. William M. Farmer, DO performed more complete abdominal ultrasound, and FibroScan (transient elastography) procedures for Medicare patients than 75% of them and he also had a list price for chronic care, fecal occult blood test (FOBT), stool guaiac test (gFOBT), and stool tests 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

2012 Medicare Procedure Volume

The top procedures that Dr. William M. Farmer, DO treated as a gastroenterologist in Hattiesburg, MS during 2012 were gastrointestinal procedures, minimally invasive procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. William M. Farmer, DO for Medicare patients.

blood draw	42
diagnostic procedures	384
doctor visit	730
esophageal dilation	37
gastrointestinal procedures	714
hospital care	525
injections	15
inpatient care	525
minimally invasive procedures	596
preventive care	93
removal of lesion (e.g. growth)	384

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. William M. Farmer, DO treated as a gastroenterologist in Hattiesburg, MS during 2013 were gastrointestinal procedures, minimally invasive procedures, hospital care and inpatient care.

Volume of procedures performed by Dr. William M. Farmer, DO for Medicare patients.

abdominal imaging	53
diagnostic procedures	393
doctor visit	680
esophageal dilation	43
gastrointestinal procedures	622
hospital care	398
inpatient care	398
minimally invasive procedures	540
preventive care	75
removal of lesion (e.g. growth)	393
ultrasound (sonogram)	53

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. William M. Farmer, DO.

**Gender**
Male	285
Female	361

**Ethnicity**
Non-Hispanic White	497
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	279
From 75 to 84	137
85 and over	45
Less than 65	185

Conditions of Medicare patients treated by Dr. William M. Farmer, DO in 2013

Hypertension	74
High Cholesterol	51
Stroke	5
Ischemic Heart Disease	42
Depression	30
Chronic Kidney Disease	19
Asthma	8
Osteoperosis	4
Atrial Fibrilation	12
Heart Failure	23
Chronic Obstructive Pulmonary Disease	21
Diabetes	37
Dementia	11
Cancer	12

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. William M. Farmer, DO treated as a gastroenterologist in Hattiesburg, MS during 2014 were gastrointestinal procedures, minimally invasive procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. William M. Farmer, DO for Medicare patients.

abdominal imaging	160
diagnostic procedures	418
doctor visit	683
esophageal dilation	40
gastrointestinal procedures	680
hospital care	282
inpatient care	269
minimally invasive procedures	601
outpatient care	13
preventive care	93
removal of lesion (e.g. growth)	418
ultrasound (sonogram)	160

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. William M. Farmer, DO.

**Gender**
Male	299
Female	387

**Ethnicity**
Non-Hispanic White	535
Black	139
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	311
From 75 to 84	156
85 and over	53
Less than 65	166

Conditions of Medicare patients treated by Dr. William M. Farmer, DO in 2014

Hypertension	73
High Cholesterol	47
Stroke	4
Ischemic Heart Disease	38
Depression	24
Chronic Kidney Disease	21
Asthma	7
Osteoperosis	4
Atrial Fibrilation	9
Heart Failure	22
Chronic Obstructive Pulmonary Disease	18
Diabetes	37
Dementia	10
Cancer	7

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. William M. Farmer, DO treated as a gastroenterologist in Hattiesburg, MS during 2015 were gastrointestinal procedures, minimally invasive procedures, removal of lesion (e.g. growth) and diagnostic procedures.

Volume of procedures performed by Dr. William M. Farmer, DO for Medicare patients.

abdominal imaging	149
diagnostic procedures	407
doctor visit	660
esophageal dilation	53
gastrointestinal procedures	637
hospital care	244
inpatient care	217
minimally invasive procedures	601
outpatient care	27
preventive care	89
removal of lesion (e.g. growth)	407
ultrasound (sonogram)	149

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. William M. Farmer, DO.

**Gender**
Male	588
Female	772

**Ethnicity**
Non-Hispanic White	1010
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	616
From 75 to 84	238
85 and over	92
Less than 65	414

Conditions of Medicare patients treated by Dr. William M. Farmer, DO in 2015

Hypertension	70
High Cholesterol	48
Stroke	4
Ischemic Heart Disease	34
Depression	25
Chronic Kidney Disease	23
Asthma	13
Osteoperosis	5
Atrial Fibrilation	8
Heart Failure	17
Chronic Obstructive Pulmonary Disease	18
Diabetes	34
Dementia	9
Cancer	10

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. William M. Farmer, DO treated as a gastroenterologist in Hattiesburg, MS during 2016 were gastrointestinal procedures, minimally invasive procedures, lab tests and removal of lesion (e.g. growth).

Volume of procedures performed by Dr. William M. Farmer, DO for Medicare patients.

abdominal imaging	154
diagnostic procedures	417
doctor visit	612
esophageal dilation	45
gastrointestinal procedures	568
hospital care	231
inpatient care	231
lab tests	467
minimally invasive procedures	528
preventive care	47
removal of lesion (e.g. growth)	417
ultrasound (sonogram)	154

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. William M. Farmer, DO.

**Gender**
Male	274
Female	370

**Ethnicity**
Non-Hispanic White	479
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	306
From 75 to 84	132
85 and over	34
Less than 65	172

Conditions of Medicare patients treated by Dr. William M. Farmer, DO in 2016

Hypertension	73
High Cholesterol	48
Stroke	4
Ischemic Heart Disease	39
Depression	26
Chronic Kidney Disease	27
Asthma	18
Osteoperosis	5
Atrial Fibrilation	8
Heart Failure	19
Chronic Obstructive Pulmonary Disease	18
Diabetes	34
Dementia	12
Cancer	8

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. William M. Farmer, DO treated as a gastroenterologist in Hattiesburg, MS during 2017 were minimally invasive procedures, gastrointestinal procedures, lab tests and removal of lesion (e.g. growth).

Volume of procedures performed by Dr. William M. Farmer, DO for Medicare patients.

abdominal imaging	164
diagnostic procedures	506
doctor visit	707
esophageal dilation	45
gastrointestinal procedures	675
hospital care	263
inpatient care	263
lab tests	615
minimally invasive procedures	688
preventive care	96
removal of lesion (e.g. growth)	506
ultrasound (sonogram)	164

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. William M. Farmer, DO.

**Gender**
Male	301
Female	394

**Ethnicity**
Non-Hispanic White	540
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	331
From 75 to 84	146
85 and over	47
Less than 65	171

Conditions of Medicare patients treated by Dr. William M. Farmer, DO in 2017

Hypertension	75
High Cholesterol	47
Stroke	4
Ischemic Heart Disease	41
Depression	27
Chronic Kidney Disease	33
Asthma	8
Osteoperosis	6
Atrial Fibrilation	10
Heart Failure	19
Chronic Obstructive Pulmonary Disease	20
Diabetes	35
Dementia	12
Cancer	11

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. William M. Farmer, DO treated as a gastroenterologist in Hattiesburg, MS during 2018 were lab tests, minimally invasive procedures, gastrointestinal procedures and diagnostic procedures.

Volume of procedures performed by Dr. William M. Farmer, DO for Medicare patients.

abdominal imaging	193
biological response modifier (BRM) therapy	39
chemotherapy	39
diagnostic procedures	448
doctor visit	683
esophageal dilation	55
gastrointestinal procedures	627
hospital care	206
inpatient care	206
lab tests	670
liver imaging	43
minimally invasive procedures	639
preventive care	98
removal of lesion (e.g. growth)	448
ultrasound (sonogram)	236

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. William M. Farmer, DO.

**Gender**
Male	291
Female	431

**Ethnicity**
Non-Hispanic White	562
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	368
From 75 to 84	151
85 and over	47
Less than 65	156

Conditions of Medicare patients treated by Dr. William M. Farmer, DO in 2018

Hypertension	75
High Cholesterol	56
Stroke	5
Ischemic Heart Disease	43
Depression	29
Chronic Kidney Disease	32
Asthma	7
Osteoperosis	6
Atrial Fibrilation	10
Heart Failure	17
Chronic Obstructive Pulmonary Disease	18
Diabetes	35
Dementia	11
Cancer	9

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. William M. Farmer, DO treated as a gastroenterologist in Hattiesburg, MS during 2019 were lab tests, minimally invasive procedures, gastrointestinal procedures and diagnostic procedures.

Volume of procedures performed by Dr. William M. Farmer, DO for Medicare patients.

abdominal imaging	196
biological response modifier (BRM) therapy	33
chemotherapy	33
diagnostic procedures	523
doctor visit	768
esophageal dilation	55
gastrointestinal procedures	683
hospital care	208
inpatient care	208
lab tests	840
liver imaging	50
minimally invasive procedures	699
preventive care	87
removal of lesion (e.g. growth)	523
ultrasound (sonogram)	246

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. William M. Farmer, DO.

**Gender**
Male	304
Female	453

**Ethnicity**
Non-Hispanic White	601
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	404
From 75 to 84	169
85 and over	38
Less than 65	146

Conditions of Medicare patients treated by Dr. William M. Farmer, DO in 2019

Hypertension	75
High Cholesterol	56
Stroke	5
Ischemic Heart Disease	43
Depression	30
Chronic Kidney Disease	32
Asthma	7
Osteoperosis	8
Atrial Fibrilation	9
Heart Failure	20
Chronic Obstructive Pulmonary Disease	19
Diabetes	40
Dementia	11
Cancer	10

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. William M. Farmer, DO treated as a gastroenterologist in Hattiesburg, MS during 2020 were lab tests, gastrointestinal procedures, minimally invasive procedures and removal of lesion (e.g. growth).

Volume of procedures performed by Dr. William M. Farmer, DO for Medicare patients.

abdominal imaging	172
diagnostic procedures	408
doctor visit	522
esophageal dilation	53
gastrointestinal procedures	533
hospital care	68
inpatient care	68
lab tests	764
liver imaging	65
minimally invasive procedures	509
preventive care	71
removal of lesion (e.g. growth)	408
ultrasound (sonogram)	237

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. William M. Farmer, DO.

**Gender**
Male	230
Female	300

**Ethnicity**
Non-Hispanic White	430
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	280
From 75 to 84	105
85 and over	30
Less than 65	115

Conditions of Medicare patients treated by Dr. William M. Farmer, DO in 2020

Hypertension	73
High Cholesterol	56
Stroke	4
Ischemic Heart Disease	41
Depression	27
Chronic Kidney Disease	31
Asthma	7
Osteoperosis	8
Atrial Fibrilation	7
Heart Failure	18
Chronic Obstructive Pulmonary Disease	19
Diabetes	34
Dementia	10
Cancer	11

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. William M. Farmer, DO treated as a gastroenterologist in Hattiesburg, MS during 2021 were lab tests, minimally invasive procedures, gastrointestinal procedures and removal of lesion (e.g. growth).

Volume of procedures performed by Dr. William M. Farmer, DO for Medicare patients.

abdominal imaging	123
diagnostic procedures	447
doctor visit	586
esophageal dilation	43
gastrointestinal procedures	556
hospital care	166
inpatient care	166
lab tests	765
liver imaging	47
minimally invasive procedures	556
preventive care	74
removal of lesion (e.g. growth)	447
ultrasound (sonogram)	170

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. William M. Farmer, DO.

**Gender**
Male	234
Female	342

**Ethnicity**
Non-Hispanic White	478
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	305
From 75 to 84	146
85 and over	39
Less than 65	86

Conditions of Medicare patients treated by Dr. William M. Farmer, DO in 2021

Hypertension	74
High Cholesterol	57
Stroke	4
Ischemic Heart Disease	43
Depression	29
Chronic Kidney Disease	30
Asthma	7
Osteoperosis	7
Atrial Fibrilation	9
Heart Failure	17
Chronic Obstructive Pulmonary Disease	15
Diabetes	37
Dementia	9
Cancer	10

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. William M. Farmer, DO treated as a gastroenterologist in Hattiesburg, MS during 2022 were gastrointestinal procedures, minimally invasive procedures, diagnostic procedures and removal of lesion (e.g. growth).

Volume of procedures performed by Dr. William M. Farmer, DO for Medicare patients.

abdominal imaging	82
balloon dilation	13
chronic care	160
diagnostic procedures	423
doctor visit	609
esophageal dilation	61
gastrointestinal procedures	545
hospital care	177
inpatient care	177
liver imaging	54
minimally invasive procedures	545
preventive care	71
removal of lesion (e.g. growth)	423
ultrasound (sonogram)	136

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. William M. Farmer, DO.

**Gender**
Male	253
Female	321

**Ethnicity**
Non-Hispanic White	487
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	310
From 75 to 84	159
85 and over	32
Less than 65	73

Conditions of Medicare patients treated by Dr. William M. Farmer, DO in 2022

Hypertension	75
High Cholesterol	75
Stroke	6
Ischemic Heart Disease	37
Depression	26
Chronic Kidney Disease	17
Asthma	11
Osteoperosis	10
Atrial Fibrilation	17
Heart Failure	14
Chronic Obstructive Pulmonary Disease	18
Diabetes	35
Dementia	6
Cancer	15

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. William M. Farmer, DO for Medicare patients.

The highest averages for the top procedures that Dr. William M. Farmer, DO treated as a gastroenterologist in Hattiesburg, MS were lab tests, gastrointestinal procedures, minimally invasive procedures and diagnostic procedures.

abdominal imaging	144
balloon dilation	13
biological response modifier (BRM) therapy	36
blood draw	42
chemotherapy	36
chronic care	160
diagnostic procedures	434
doctor visit	658
esophageal dilation	48
gastrointestinal procedures	621
hospital care	251
injections	15
inpatient care	248
lab tests	686
liver imaging	51
minimally invasive procedures	591
outpatient care	20
preventive care	81
removal of lesion (e.g. growth)	434
ultrasound (sonogram)	170

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. William M. Farmer, DO.

**Gender**
Male	278
Female	375

**Ethnicity**
Black / African American	12
Asian / Pacific Islander	0
Non-Hispanic White	510
Hispanic	0
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	139
85 and over	41
Less than 65	153
65 to 74	319

Average of Total of Conditions of Medicare patients treated by Dr. William M. Farmer, DO From 2012 - 2022

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

Hypertension	67
High Cholesterol	49
Stroke	4
Ischemic Heart Disease	36
Depression	24
Chronic Kidney Disease	24
Asthma	8
Osteoporosis	5
Heart Failure	16
Chronic Obstructive Pulmonary Disease	16
Diabetes	32
Atrial Fibrillation	9
Cancer	9
Dementia	9

Education & Training

Dr. William M. Farmer, DO graduated from Kansas City University of Medicine and Biosciences (KCUMB), College of Osteopathic Medicine in 2002. He has a state license in Mississippi.

Medical School: Kansas City University of Medicine and Biosciences (KCUMB), College of Osteopathic Medicine (2002)

Licensed In: Mississippi

Affiliations & Hospitals

Dr. William M. Farmer, DO is associated with these hospitals and organizations:

Merit Health

GASTROINTESTINAL ASSOCIATES PA

Ratings & Reviews

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General Payments

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

**Payments by Company**
AbbVie Inc.	$1,910 Humira $582	Mavyret $327	LINZESS $255	Rinvoq $240	Skyrizi $239	Other $266
AbbVie, Inc.	$1,904 Humira $978	Mavyret $395	Creon $190	Viekira $184	Moderiba $28	Other $130
Pfizer Inc.	$917 XELJANZ $903	INFLECTRA $13
Janssen Biotech, Inc.	$803 STELARA $558	SIMPONI $197	REMICADE $48
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$733 XIFAXAN $660	Trulance $74
Other	$8,087 Cimzia $713	SUCRAID $645	AMITIZA $627	ZEPOSIA $553	LINZESS $535	Other $5,015

**Types of Payments**
Food and Beverage	$14,297
Education	$56

Ownership and Interest Payments

This table describes ownership payments received by Dr. William M. Farmer, DO.

GastroGPO, LLC	2022	$277.27	Physician Covered Recipient	Common Stock
GastroGPO, LLC	2021	$259.78	Physician Covered Recipient	Common Stock

Biography

Dr. William Farmer is an emergency medicine and adult gastroenterology specialist. He is professionally affiliated with Merit Health. Dr. Farmer studied medicine at Kansas City University of Medicine and Biosciences (KCUMB), College of Osteopathic Medicine.