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Home > WA Providers > Internists & Internal Medicine Doctors

Dr. John R. Mathis JR., MD

(4 Ratings)

Specializes in: Internal Medicine (Adult Medicine)

University of Utah School of Medicine (1991)

1213 24th Street Suite 100
Anacortes, WA 98221

(360) 293-3101

Dr. John R. Mathis JR., MD is an internist in Anacortes, WA specializing in internal medicine (adult medicine). He graduated from University of Utah School of Medicine in 1991 and has 35 years of experience. Dr. John R. Mathis JR., MD is affiliated with SELECT REHABILITATION, LLC, PUBLIC HOSPITAL DISTRICT NO 2 SKAGIT COUNTY WASHINGTON and SELECT OUTPATIENT SERVICES INC.

Office Locations

1213 24th Street Suite 100
Anacortes, WA 98221

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Noteworthy Medicare Patient Procedures Performed by Dr. John R. Mathis JR., MD in 2024

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

Top 5%

By Volume:

pulmonary function test

By Affordability:

lung diffusion capacity test

lung volume test

pulmonary function test

pulmonary testing

In 2024, among providers in related specialties within Washington, Dr. John R. Mathis JR., MD performed more pulmonary function test (PFT) procedures for Medicare patients than 95% of them and he also had a list price for lung diffusion capacity test (DLCO), lung volume test, pulmonary function test (PFT), and pulmonary testing that was lower than the list prices billed to Medicare by 95% 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. John R. Mathis JR., MD treated as an internist in Anacortes, WA during 2012 were hospital care, inpatient care, stress testing and cardiac procedures.

Volume of procedures performed by Dr. John R. Mathis JR., MD for Medicare patients.

cardiac procedures	45
hospital care	242
inpatient care	231
outpatient care	11
stress testing	45

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John R. Mathis JR., MD treated as an internist in Anacortes, WA during 2013 were hospital care, inpatient care, stress testing and cardiac procedures.

Volume of procedures performed by Dr. John R. Mathis JR., MD for Medicare patients.

cardiac procedures	29
hospital care	206
inpatient care	206
stress testing	29

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Mathis JR., MD.

**Gender**
Male	169
Female	188

**Ethnicity**
Non-Hispanic White	330
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	105
From 75 to 84	133
85 and over	91
Less than 65	28

Conditions of Medicare patients treated by Dr. John R. Mathis JR., MD in 2013

Hypertension	73
High Cholesterol	55
Stroke	12
Ischemic Heart Disease	40
Depression	25
Chronic Kidney Disease	30
Asthma	8
Osteoperosis	9
Atrial Fibrilation	26
Heart Failure	29
Chronic Obstructive Pulmonary Disease	19
Diabetes	30
Dementia	16
Cancer	19

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John R. Mathis JR., MD treated as an internist in Anacortes, WA during 2014 were hospital care, inpatient care, pulmonary testing and stress testing.

Volume of procedures performed by Dr. John R. Mathis JR., MD for Medicare patients.

cardiac procedures	37
hospital care	178
inpatient care	178
pulmonary testing	140
stress testing	37

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Mathis JR., MD.

**Gender**
Male	208
Female	244

**Ethnicity**
Non-Hispanic White	426
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	162
From 75 to 84	159
85 and over	101
Less than 65	30

Conditions of Medicare patients treated by Dr. John R. Mathis JR., MD in 2014

Hypertension	69
High Cholesterol	51
Stroke	9
Ischemic Heart Disease	36
Depression	23
Chronic Kidney Disease	26
Asthma	9
Osteoperosis	6
Atrial Fibrilation	25
Heart Failure	24
Chronic Obstructive Pulmonary Disease	19
Diabetes	27
Dementia	12
Cancer	16

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John R. Mathis JR., MD treated as an internist in Anacortes, WA during 2015 were pulmonary testing, hospital care, inpatient care and stress testing.

Volume of procedures performed by Dr. John R. Mathis JR., MD for Medicare patients.

cardiac procedures	42
hospital care	235
inpatient care	224
outpatient care	11
pulmonary testing	270
stress testing	42

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Mathis JR., MD.

**Gender**
Male	526
Female	590

**Ethnicity**
Non-Hispanic White	1046
Black	0
Hispanic	0
Asian	0
Other	30
Native American	0

**Age**
From 65 to 74	402
From 75 to 84	396
85 and over	270
Less than 65	48

Conditions of Medicare patients treated by Dr. John R. Mathis JR., MD in 2015

Hypertension	69
High Cholesterol	55
Stroke	9
Ischemic Heart Disease	38
Depression	25
Chronic Kidney Disease	30
Asthma	19
Osteoperosis	8
Atrial Fibrilation	32
Heart Failure	30
Chronic Obstructive Pulmonary Disease	25
Diabetes	25
Dementia	12
Cancer	14

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John R. Mathis JR., MD treated as an internist in Anacortes, WA during 2016 were pulmonary testing, hospital care, inpatient care and stress testing.

Volume of procedures performed by Dr. John R. Mathis JR., MD for Medicare patients.

cardiac procedures	50
hospital care	221
inpatient care	205
outpatient care	16
pulmonary testing	371
stress testing	50

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Mathis JR., MD.

**Gender**
Male	269
Female	311

**Ethnicity**
Non-Hispanic White	546
Black	0
Hispanic	0
Asian	0
Other	0
Native American	12

**Age**
From 65 to 74	211
From 75 to 84	214
85 and over	114
Less than 65	41

Conditions of Medicare patients treated by Dr. John R. Mathis JR., MD in 2016

Hypertension	68
High Cholesterol	52
Stroke	13
Ischemic Heart Disease	39
Depression	25
Chronic Kidney Disease	27
Asthma	25
Osteoperosis	6
Atrial Fibrilation	24
Heart Failure	24
Chronic Obstructive Pulmonary Disease	22
Diabetes	27
Dementia	14
Cancer	14

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John R. Mathis JR., MD treated as an internist in Anacortes, WA during 2017 were pulmonary testing, hospital care, inpatient care and stress testing.

Volume of procedures performed by Dr. John R. Mathis JR., MD for Medicare patients.

cardiac procedures	48
hospital care	198
inpatient care	166
outpatient care	32
pulmonary testing	359
stress testing	48

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Mathis JR., MD.

**Gender**
Male	311
Female	341

**Ethnicity**
Non-Hispanic White	603
Black	0
Hispanic	0
Asian	0
Other	13
Native American	15

**Age**
From 65 to 74	236
From 75 to 84	246
85 and over	130
Less than 65	40

Conditions of Medicare patients treated by Dr. John R. Mathis JR., MD in 2017

Hypertension	69
High Cholesterol	48
Stroke	12
Ischemic Heart Disease	32
Depression	22
Chronic Kidney Disease	28
Asthma	9
Osteoperosis	6
Atrial Fibrilation	26
Heart Failure	26
Chronic Obstructive Pulmonary Disease	22
Diabetes	23
Dementia	15
Cancer	12

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John R. Mathis JR., MD treated as an internist in Anacortes, WA during 2018 were pulmonary testing, stress testing, cardiac procedures and hospital care.

Volume of procedures performed by Dr. John R. Mathis JR., MD for Medicare patients.

cardiac procedures	153
hospital care	89
inpatient care	89
pulmonary testing	313
stress testing	153

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Mathis JR., MD.

**Gender**
Male	404
Female	454

**Ethnicity**
Non-Hispanic White	790
Black	0
Hispanic	15
Asian	0
Other	19
Native American	15

**Age**
From 65 to 74	314
From 75 to 84	321
85 and over	171
Less than 65	52

Conditions of Medicare patients treated by Dr. John R. Mathis JR., MD in 2018

Hypertension	70
High Cholesterol	52
Stroke	10
Ischemic Heart Disease	38
Depression	24
Chronic Kidney Disease	29
Asthma	9
Osteoperosis	7
Atrial Fibrilation	27
Heart Failure	26
Chronic Obstructive Pulmonary Disease	18
Diabetes	24
Dementia	13
Cancer	9

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John R. Mathis JR., MD treated as an internist in Anacortes, WA during 2019 were pulmonary testing, stress testing, cardiac procedures and hospital care.

Volume of procedures performed by Dr. John R. Mathis JR., MD for Medicare patients.

cardiac procedures	206
hospital care	124
inpatient care	100
outpatient care	24
pulmonary testing	342
stress testing	206

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Mathis JR., MD.

**Gender**
Male	381
Female	442

**Ethnicity**
Non-Hispanic White	755
Black	0
Hispanic	12
Asian	14
Other	26
Native American	0

**Age**
From 65 to 74	323
From 75 to 84	297
85 and over	155
Less than 65	48

Conditions of Medicare patients treated by Dr. John R. Mathis JR., MD in 2019

Hypertension	69
High Cholesterol	56
Stroke	7
Ischemic Heart Disease	42
Depression	21
Chronic Kidney Disease	28
Asthma	8
Osteoperosis	8
Atrial Fibrilation	24
Heart Failure	24
Chronic Obstructive Pulmonary Disease	20
Diabetes	22
Dementia	12
Cancer	10

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John R. Mathis JR., MD treated as an internist in Anacortes, WA during 2020 were pulmonary testing, stress testing, cardiac procedures and hospital care.

Volume of procedures performed by Dr. John R. Mathis JR., MD for Medicare patients.

cardiac procedures	27
hospital care	11
inpatient care	11
pulmonary testing	267
stress testing	27

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Mathis JR., MD.

**Gender**
Male	265
Female	367

**Ethnicity**
Non-Hispanic White	591
Black	0
Hispanic	0
Asian	0
Other	12
Native American	0

**Age**
From 65 to 74	240
From 75 to 84	229
85 and over	131
Less than 65	32

Conditions of Medicare patients treated by Dr. John R. Mathis JR., MD in 2020

Hypertension	68
High Cholesterol	54
Stroke	10
Ischemic Heart Disease	38
Depression	26
Chronic Kidney Disease	30
Asthma	8
Osteoperosis	7
Atrial Fibrilation	22
Heart Failure	23
Chronic Obstructive Pulmonary Disease	19
Diabetes	20
Dementia	12
Cancer	13

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John R. Mathis JR., MD treated as an internist in Anacortes, WA during 2021 were pulmonary testing, hospital care, inpatient care and outpatient care.

Volume of procedures performed by Dr. John R. Mathis JR., MD for Medicare patients.

cardiac procedures	26
hospital care	122
inpatient care	92
outpatient care	30
pulmonary testing	368
stress testing	26

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Mathis JR., MD.

**Gender**
Male	352
Female	420

**Ethnicity**
Non-Hispanic White	710
Black	0
Hispanic	0
Asian	0
Other	32
Native American	0

**Age**
From 65 to 74	281
From 75 to 84	291
85 and over	164
Less than 65	36

Conditions of Medicare patients treated by Dr. John R. Mathis JR., MD in 2021

Hypertension	70
High Cholesterol	60
Stroke	9
Ischemic Heart Disease	43
Depression	24
Chronic Kidney Disease	32
Asthma	8
Osteoperosis	8
Atrial Fibrilation	24
Heart Failure	25
Chronic Obstructive Pulmonary Disease	20
Diabetes	24
Dementia	14
Cancer	12

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John R. Mathis JR., MD treated as an internist in Anacortes, WA during 2022 were pulmonary testing, hospital care, inpatient care and stress testing.

Volume of procedures performed by Dr. John R. Mathis JR., MD for Medicare patients.

cardiac procedures	22
hospital care	114
inpatient care	102
outpatient care	12
pulmonary testing	342
stress testing	22

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Mathis JR., MD.

**Gender**
Male	407
Female	477

**Ethnicity**
Non-Hispanic White	813
Black	0
Hispanic	0
Asian	14
Other	24
Native American	16

**Age**
From 65 to 74	306
From 75 to 84	373
85 and over	174
Less than 65	31

Conditions of Medicare patients treated by Dr. John R. Mathis JR., MD in 2022

Hypertension	75
High Cholesterol	74
Stroke	16
Ischemic Heart Disease	30
Depression	21
Chronic Kidney Disease	24
Asthma	11
Osteoperosis	12
Atrial Fibrilation	33
Heart Failure	25
Chronic Obstructive Pulmonary Disease	19
Diabetes	25
Dementia	9
Cancer	15

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. John R. Mathis JR., MD treated as an internist in Anacortes, WA during 2023 were pulmonary testing, hospital care and inpatient care.

Volume of procedures performed by Dr. John R. Mathis JR., MD for Medicare patients.

hospital care	143
inpatient care	143
pulmonary testing	421

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Mathis JR., MD.

**Gender**
Male	477
Female	527

**Ethnicity**
Non-Hispanic White	921
Black	0
Hispanic	11
Asian	14
Other	43
Native American	0

**Age**
From 65 to 74	335
From 75 to 84	421
85 and over	203
Less than 65	45

Conditions of Medicare patients treated by Dr. John R. Mathis JR., MD in 2023

Hypertension	75
High Cholesterol	71
Stroke	15
Ischemic Heart Disease	28
Depression	22
Chronic Kidney Disease	22
Asthma	11
Osteoperosis	13
Atrial Fibrilation	34
Heart Failure	25
Chronic Obstructive Pulmonary Disease	20
Diabetes	26
Dementia	7
Cancer	17

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. John R. Mathis JR., MD treated as an internist in Anacortes, WA during 2024 were pulmonary testing, hospital care and inpatient care.

Volume of procedures performed by Dr. John R. Mathis JR., MD for Medicare patients.

hospital care	52
inpatient care	52
pulmonary testing	497

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Mathis JR., MD.

**Gender**
Male	508
Female	583

**Ethnicity**
Non-Hispanic White	1009
Black	0
Hispanic	0
Asian	16
Other	43
Native American	0

**Age**
From 65 to 74	371
From 75 to 84	456
85 and over	223
Less than 65	41

Conditions of Medicare patients treated by Dr. John R. Mathis JR., MD in 2024

Hypertension	75
High Cholesterol	75
Stroke	13
Ischemic Heart Disease	31
Depression	23
Chronic Kidney Disease	24
Asthma	13
Osteoperosis	13
Atrial Fibrilation	30
Heart Failure	22
Chronic Obstructive Pulmonary Disease	21
Diabetes	23
Dementia	10
Cancer	16

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. John R. Mathis JR., MD for Medicare patients.

The highest averages for the top procedures that Dr. John R. Mathis JR., MD treated as an internist in Anacortes, WA were pulmonary testing, hospital care, inpatient care and stress testing.

cardiac procedures	62
hospital care	148
inpatient care	138
outpatient care	19
pulmonary testing	335
stress testing	62

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. John R. Mathis JR., MD.

**Gender**
Female	380
Male	329

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	4
Non-Hispanic White	656
Hispanic	2
Native American / Alaskan Native	4
Other	18

**Age**
85 and over	148
75 to 84	272
Less than 65	36
65 to 74	252

Average of Total of Conditions of Medicare patients treated by Dr. John R. Mathis JR., MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. John R. Mathis JR., MD treated were hypertension, high cholesterol, ischemic heart disease and atrial fibrilation.

Hypertension	65
High Cholesterol	54
Stroke	10
Ischemic Heart Disease	33
Depression	21
Chronic Kidney Disease	25
Asthma	10
Osteoporosis	7
Heart Failure	23
Chronic Obstructive Pulmonary Disease	18
Diabetes	22
Atrial Fibrillation	25
Dementia	11
Cancer	12

Education & Training

Dr. John R. Mathis JR., MD graduated from University of Utah School of Medicine in 1991. He is certified by the American Board of Internal Medicine and has a state license in Washington.

Medical School: University of Utah School of Medicine (1991)

Board Certification: American Board of Internal Medicine

Licensed In: Washington

Ratings & Reviews

Dr. John R. Mathis JR., MD has a high overall rating with an average of 3.5 out of 5 stars based on 4 ratings. We collect ratings and reviews of Dr. John R. Mathis JR., MD from all over the web to help you find the right in Anacortes, WA.

3.5

Overall Rating

(4 Ratings)

Leave a Review

Reviews From Around The Web

Overall Rating: 3.0 2026-09-18

Patient verified via Press Ganey

He is nice enough and very knowledgeable however I felt rushed and like a number he was ticking off for the day. I will be seeking someone with a warmer approach to work with in the future.

Overall Rating: 5.0 2026-10-21

Patient verified via Press Ganey

I recommend this clinic all the time.

Overall Rating: 5.0 2026-06-26

Patient verified via Press Ganey

Excellent care

General Payments

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