Procedure Volume Patient Data Patient Conditions Reviews General Payments Back to Top

Home > OK Providers > Internists & Internal Medicine Doctors

Dr. Thomas Henry Merrill, MD

(Thomas Henry Merrill, MD)

(121 Ratings)

Specializes in: Internal Medicine (Adult Medicine)

University of Oklahoma College of Medicine (1982)

950 N. Porter Avenue Suite 200 Mercy Clinic Primary Care
Norman, OK 73071

(405) 329-0121

Dr. Thomas Henry Merrill, MD is an internist in Norman, OK specializing in internal medicine (adult medicine). He graduated from University of Oklahoma College of Medicine in 1982 and has 44 years of experience. Dr. Thomas Henry Merrill, MD is affiliated with Mercy Health System, Mercy Clinic Primary Care - Norman Porter and MERCY CLINIC OKLAHOMA COMMUNITIES.

Office Locations

950 N. Porter Avenue Suite 200 Mercy Clinic Primary Care
Norman, OK 73071

open_in_new

Noteworthy Medicare Patient Procedures Performed by Dr. Thomas Henry Merrill, MD in 2023

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

Top 5%

By Volume:

flu shot

In 2023, Dr. Thomas Henry Merrill, MD performed more flu shot procedures for Medicare patients than 95% of providers in related specialties within Oklahoma.

Top 25%

By Affordability:

antigen tests

influenza tests

In 2012, Dr. Thomas Henry Merrill, MD had a list price for antigen tests, and influenza tests that was lower than the list prices billed to Medicare by 75% of providers in related specialties within Oklahoma. 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. Thomas Henry Merrill, MD treated as an internist in Norman, OK during 2012 were nursing home care, hospital care, inpatient care and preventive care.

Volume of procedures performed by Dr. Thomas Henry Merrill, MD for Medicare patients.

aspiration	28
doctor visit	1575
hospital care	997
injections	28
inpatient care	973
musculoskeletal imaging	25
nursing home care	1109
outpatient care	24
preventive care	185
vaccines	185
X-rays	25

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Thomas Henry Merrill, MD treated as an internist in Norman, OK during 2013 were nursing home care, hospital care, inpatient care and preventive care.

Volume of procedures performed by Dr. Thomas Henry Merrill, MD for Medicare patients.

ambulatory monitoring	12
aspiration	26
cardiac procedures	12
doctor visit	1588
hospital care	982
injections	26
inpatient care	968
musculoskeletal imaging	22
nursing home care	1068
outpatient care	14
preventive care	210
vaccines	210
X-rays	22

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Henry Merrill, MD.

**Gender**
Male	497
Female	806

**Ethnicity**
Non-Hispanic White	1224
Black	0
Hispanic	0
Asian	0
Other	0
Native American	47

**Age**
From 65 to 74	373
From 75 to 84	498
85 and over	348
Less than 65	84

Conditions of Medicare patients treated by Dr. Thomas Henry Merrill, MD in 2013

Hypertension	75
High Cholesterol	57
Stroke	10
Ischemic Heart Disease	44
Depression	37
Chronic Kidney Disease	28
Asthma	10
Osteoperosis	11
Atrial Fibrilation	16
Heart Failure	31
Chronic Obstructive Pulmonary Disease	25
Diabetes	31
Dementia	29
Cancer	12

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Thomas Henry Merrill, MD treated as an internist in Norman, OK during 2014 were hospital care, inpatient care, nursing home care and preventive care.

Volume of procedures performed by Dr. Thomas Henry Merrill, MD for Medicare patients.

ambulatory monitoring	13
aspiration	31
cardiac procedures	13
doctor visit	1550
hospital care	1019
injections	31
inpatient care	1008
nursing home care	1000
outpatient care	11
preventive care	213
vaccines	213

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Henry Merrill, MD.

**Gender**
Male	472
Female	792

**Ethnicity**
Non-Hispanic White	1182
Black	0
Hispanic	0
Asian	0
Other	0
Native American	47

**Age**
From 65 to 74	338
From 75 to 84	478
85 and over	345
Less than 65	103

Conditions of Medicare patients treated by Dr. Thomas Henry Merrill, MD in 2014

Hypertension	75
High Cholesterol	59
Stroke	10
Ischemic Heart Disease	46
Depression	40
Chronic Kidney Disease	28
Asthma	10
Osteoperosis	12
Atrial Fibrilation	16
Heart Failure	31
Chronic Obstructive Pulmonary Disease	24
Diabetes	33
Dementia	29
Cancer	11

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Thomas Henry Merrill, MD treated as an internist in Norman, OK during 2015 were nursing home care, preventive care, vaccines and aspiration.

Volume of procedures performed by Dr. Thomas Henry Merrill, MD for Medicare patients.

aspiration	32
doctor visit	1607
injections	32
nursing home care	1281
preventive care	261
vaccines	261

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Henry Merrill, MD.

**Gender**
Male	944
Female	1520

**Ethnicity**
Non-Hispanic White	2312
Black	22
Hispanic	0
Asian	0
Other	0
Native American	80

**Age**
From 65 to 74	726
From 75 to 84	892
85 and over	718
Less than 65	128

Conditions of Medicare patients treated by Dr. Thomas Henry Merrill, MD in 2015

Hypertension	75
High Cholesterol	62
Stroke	9
Ischemic Heart Disease	45
Depression	39
Chronic Kidney Disease	28
Asthma	15
Osteoperosis	13
Atrial Fibrilation	18
Heart Failure	30
Chronic Obstructive Pulmonary Disease	24
Diabetes	31
Dementia	29
Cancer	11

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Thomas Henry Merrill, MD treated as an internist in Norman, OK during 2016 were nursing home care, preventive care, vaccines and ear procedures.

Volume of procedures performed by Dr. Thomas Henry Merrill, MD for Medicare patients.

ambulatory monitoring	11
aspiration	15
cardiac procedures	11
doctor visit	1618
ear procedures	21
injections	15
nursing home care	1220
preventive care	226
vaccines	226

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Henry Merrill, MD.

**Gender**
Male	546
Female	812

**Ethnicity**
Non-Hispanic White	1262
Black	18
Hispanic	0
Asian	11
Other	0
Native American	48

**Age**
From 65 to 74	368
From 75 to 84	520
85 and over	380
Less than 65	90

Conditions of Medicare patients treated by Dr. Thomas Henry Merrill, MD in 2016

Hypertension	75
High Cholesterol	62
Stroke	10
Ischemic Heart Disease	48
Depression	37
Chronic Kidney Disease	37
Asthma	27
Osteoperosis	12
Atrial Fibrilation	17
Heart Failure	32
Chronic Obstructive Pulmonary Disease	26
Diabetes	34
Dementia	29
Cancer	12

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Thomas Henry Merrill, MD treated as an internist in Norman, OK during 2017 were nursing home care, blood draw, preventive care and vaccines.

Volume of procedures performed by Dr. Thomas Henry Merrill, MD for Medicare patients.

aspiration	16
blood draw	453
doctor visit	1480
ear procedures	28
injections	16
nursing home care	1096
preventive care	354
vaccines	354

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Henry Merrill, MD.

**Gender**
Male	515
Female	801

**Ethnicity**
Non-Hispanic White	1212
Black	24
Hispanic	0
Asian	0
Other	0
Native American	52

**Age**
From 65 to 74	390
From 75 to 84	458
85 and over	362
Less than 65	106

Conditions of Medicare patients treated by Dr. Thomas Henry Merrill, MD in 2017

Hypertension	75
High Cholesterol	56
Stroke	10
Ischemic Heart Disease	45
Depression	36
Chronic Kidney Disease	38
Asthma	10
Osteoperosis	13
Atrial Fibrilation	16
Heart Failure	30
Chronic Obstructive Pulmonary Disease	26
Diabetes	34
Dementia	27
Cancer	11

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Thomas Henry Merrill, MD treated as an internist in Norman, OK during 2018 were nursing home care, blood draw, preventive care and vaccines.

Volume of procedures performed by Dr. Thomas Henry Merrill, MD for Medicare patients.

aspiration	12
blood draw	1032
doctor visit	1333
injections	12
nursing home care	1049
preventive care	307
vaccines	296

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Henry Merrill, MD.

**Gender**
Male	384
Female	588

**Ethnicity**
Non-Hispanic White	910
Black	0
Hispanic	0
Asian	0
Other	0
Native American	33

**Age**
From 65 to 74	270
From 75 to 84	386
85 and over	284
Less than 65	32

Conditions of Medicare patients treated by Dr. Thomas Henry Merrill, MD in 2018

Hypertension	75
High Cholesterol	67
Stroke	9
Ischemic Heart Disease	44
Depression	35
Chronic Kidney Disease	37
Asthma	9
Osteoperosis	15
Atrial Fibrilation	18
Heart Failure	30
Chronic Obstructive Pulmonary Disease	22
Diabetes	31
Dementia	26
Cancer	13

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Thomas Henry Merrill, MD treated as an internist in Norman, OK during 2019 were blood draw, nursing home care, preventive care and vaccines.

Volume of procedures performed by Dr. Thomas Henry Merrill, MD for Medicare patients.

blood draw	1073
doctor visit	1357
nursing home care	986
preventive care	314
spinal procedures	18
vaccines	284
X-rays	18

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Henry Merrill, MD.

**Gender**
Male	343
Female	467

**Ethnicity**
Non-Hispanic White	756
Black	0
Hispanic	0
Asian	0
Other	11
Native American	24

**Age**
From 65 to 74	0
From 75 to 84	307
85 and over	0
Less than 65	20

Conditions of Medicare patients treated by Dr. Thomas Henry Merrill, MD in 2019

Hypertension	75
High Cholesterol	66
Stroke	6
Ischemic Heart Disease	41
Depression	30
Chronic Kidney Disease	34
Asthma	10
Osteoperosis	14
Atrial Fibrilation	18
Heart Failure	29
Chronic Obstructive Pulmonary Disease	18
Diabetes	30
Dementia	25
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Thomas Henry Merrill, MD treated as an internist in Norman, OK during 2020 were nursing home care, blood draw, preventive care and vaccines.

Volume of procedures performed by Dr. Thomas Henry Merrill, MD for Medicare patients.

blood draw	883
doctor visit	1135
nursing home care	1218
preventive care	253
vaccines	239

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Henry Merrill, MD.

**Gender**
Male	331
Female	438

**Ethnicity**
Non-Hispanic White	726
Black	0
Hispanic	0
Asian	0
Other	12
Native American	16

**Age**
From 65 to 74	241
From 75 to 84	277
85 and over	232
Less than 65	19

Conditions of Medicare patients treated by Dr. Thomas Henry Merrill, MD in 2020

Hypertension	75
High Cholesterol	62
Stroke	7
Ischemic Heart Disease	41
Depression	27
Chronic Kidney Disease	34
Asthma	9
Osteoperosis	12
Atrial Fibrilation	17
Heart Failure	26
Chronic Obstructive Pulmonary Disease	15
Diabetes	29
Dementia	25
Cancer	11

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Thomas Henry Merrill, MD treated as an internist in Norman, OK during 2021 were nursing home care, blood draw, preventive care and vaccines.

Volume of procedures performed by Dr. Thomas Henry Merrill, MD for Medicare patients.

blood draw	399
doctor visit	967
nursing home care	1044
preventive care	203
spinal procedures	11
vaccines	181
X-rays	11

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Henry Merrill, MD.

**Gender**
Male	311
Female	439

**Ethnicity**
Non-Hispanic White	705
Black	0
Hispanic	0
Asian	0
Other	14
Native American	19

**Age**
From 65 to 74	234
From 75 to 84	278
85 and over	219
Less than 65	19

Conditions of Medicare patients treated by Dr. Thomas Henry Merrill, MD in 2021

Hypertension	75
High Cholesterol	65
Stroke	7
Ischemic Heart Disease	43
Depression	31
Chronic Kidney Disease	38
Asthma	8
Osteoperosis	12
Atrial Fibrilation	19
Heart Failure	27
Chronic Obstructive Pulmonary Disease	17
Diabetes	29
Dementia	25
Cancer	11

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Thomas Henry Merrill, MD treated as an internist in Norman, OK during 2022 were nursing home care, preventive care, vaccines and lab tests.

Volume of procedures performed by Dr. Thomas Henry Merrill, MD for Medicare patients.

blood draw	12
doctor visit	907
lab tests	23
nursing home care	1034
preventive care	168
spinal procedures	21
vaccines	150
X-rays	21

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Thomas Henry Merrill, MD.

**Gender**
Male	313
Female	411

**Ethnicity**
Non-Hispanic White	677
Black	0
Hispanic	0
Asian	0
Other	16
Native American	15

**Age**
From 65 to 74	230
From 75 to 84	250
85 and over	223
Less than 65	21

Conditions of Medicare patients treated by Dr. Thomas Henry Merrill, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	37
Depression	27
Chronic Kidney Disease	30
Asthma	12
Osteoperosis	18
Atrial Fibrilation	27
Heart Failure	23
Chronic Obstructive Pulmonary Disease	18
Diabetes	27
Dementia	18
Cancer	16

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Thomas Henry Merrill, MD for Medicare patients.

The highest averages for the top procedures that Dr. Thomas Henry Merrill, MD treated as an internist in Norman, OK were nursing home care, hospital care, inpatient care and blood draw.

ambulatory monitoring	12
aspiration	22
blood draw	642
cardiac procedures	12
doctor visit	1374
ear procedures	24
hospital care	999
injections	22
inpatient care	983
lab tests	23
musculoskeletal imaging	23
nursing home care	1100
outpatient care	16
preventive care	244
spinal procedures	16
vaccines	236
X-rays	19

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Thomas Henry Merrill, MD.

**Gender**
Male	423
Female	643

**Ethnicity**
Black / African American	5
Asian / Pacific Islander	1
Non-Hispanic White	996
Hispanic	0
Native American / Alaskan Native	34
Other	4

**Age**
75 to 84	394
85 and over	282
Less than 65	56
65 to 74	288

Average of Total of Conditions of Medicare patients treated by Dr. Thomas Henry Merrill, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Thomas Henry Merrill, MD treated were hypertension, high cholesterol, ischemic heart disease and depression.

Hypertension	68
High Cholesterol	57
Stroke	8
Ischemic Heart Disease	39
Depression	30
Chronic Kidney Disease	30
Asthma	10
Osteoporosis	12
Heart Failure	26
Chronic Obstructive Pulmonary Disease	19
Diabetes	28
Atrial Fibrillation	16
Cancer	10
Dementia	23

Education & Training

Dr. Thomas Henry Merrill, MD graduated from University of Oklahoma College of Medicine in 1982. He completed residency at University of Oklahoma Health Sciences Center. He is certified by the American Board of Internal Medicine and has a state license in Oklahoma.

Medical School: University of Oklahoma College of Medicine (1982)

Residency: University of Oklahoma Health Sciences Center

Board Certification: American Board of Internal Medicine

Licensed In: Oklahoma

Affiliations & Hospitals

Dr. Thomas Henry Merrill, MD is associated with these hospitals and organizations:

Mercy Health System

Mercy Clinic Primary Care - Norman Porter

MERCY CLINIC OKLAHOMA COMMUNITIES

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. Thomas Henry Merrill, MD appears to accept the following insurance providers: HealthChoice, HealthSmart, USA Managed Care Organization, Aetna, United Healthcare, Three Rivers, Humana, Coventry, Cigna, Anthem BlueCross BlueShield, MultiPlan/PHCS, Preferred Community Choice, Tribute, GlobalHealth, Healthcare Highways, Oklahoma Health Network, Oklahoma State Medical Association (OSMA), National Preferred Provider Network, Indian Health Services, Community Care of OK, Chickasaw Nation and Community Care of Oklahoma.

Insurance Accepted by Provider includes:

According to our sources, Dr. Thomas Henry Merrill, MD accepts the following insurance providers:

HealthChoice

HealthSmart

USA Managed Care Organization

Aetna

United Healthcare

Three Rivers

Humana

Coventry

Cigna

Anthem BlueCross BlueShield

MultiPlan/PHCS

Preferred Community Choice

Tribute

GlobalHealth

Healthcare Highways

Oklahoma Health Network

Oklahoma State Medical Association (OSMA)

National Preferred Provider Network

Indian Health Services

Community Care of OK

Chickasaw Nation

Community Care of Oklahoma

Ratings & Reviews

Dr. Thomas Henry Merrill, MD has an exceptional overall rating with an average of 4.99 out of 5 stars based on 121 ratings. We collect ratings and reviews of Dr. Thomas Henry Merrill, MD from all over the web to help you find the right in Norman, OK.

4.99

Overall Rating

(121 Ratings)

Leave a Review

General Payments

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

**Payments by Company**
Musculoskeletal Transplant Foundation Inc.	$136 $136
GlaxoSmithKline, LLC.	$70 SHINGRIX $70
Sunovion Pharmaceuticals Inc.	$51 APTIOM $51
Pfizer Inc.	$38 ELIQUIS $38
Merck Sharp & Dohme Corporation	$28 NON-PRODUCT $15	GARDASIL9 $13
Other	$78 GVOKE HYPOPEN $23	INVOKANA $14	Santyl $12	Belviq $12	$17

**Types of Payments**
Food and Beverage	$374
Education	$27

Biography

Dr. Thomas Merrill is professionally affiliated with Mercy Health System. Dr. Merrill is a graduate of the University of Oklahoma College of Medicine. He trained at the University of Oklahoma Health Sciences Center for his residency. He has a 5.0 out of 5 star average patient rating. Dr. Merrill most likely takes Anthem, Blue California, and Coventry, as well as other insurance carriers. He is not accepting new patients at this time according to Yext.