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Home > WA Providers

Dr. Mariko Welch Harper, MS, FACC, MD

Accepting New Patients

(230 Ratings)

Specializes in: Adult Cardiology

33501 1ST WAY S
FEDERAL WAY, WA 98003

(253) 838-2400

Dr. Mariko Welch Harper, MS, FACC, MD is a cardiologist in FEDERAL WAY, WA specializing in adult cardiology. Dr. Mariko Welch Harper, MS, FACC, MD is affiliated with Virginia Mason Franciscan Health.

Office Locations

33501 1ST WAY S
FEDERAL WAY, WA 98003

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19116 33rd Avenue West
Lynnwood, WA 98036

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1100 NINTH AVENUE
SEATTLE, WA 98101

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In The News

“"Many people look to chest pain as a warning sign of cardiovascular disease," said Mariko Harper, a physician in Seattle who specializes in cardiovascular disease, nuclear cardiology and...”—"6 Subtle But Serious Signs You Have A Heart Problem", Huff Post, February 2021

Noteworthy Medicare Patient Procedures Performed by Dr. Mariko Welch Harper, MS, FACC, MD in 2024

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

Top 5%

By Volume:

stress echo

In 2024, Dr. Mariko Welch Harper, MS, FACC, MD performed more stress echo procedures for Medicare patients than 95% of providers in related specialties within Washington.

Top 10%

By Volume:

echocardiogram

ultrasound

By Affordability:

minimally invasive procedures

In 2024, among providers in related specialties within Washington, Dr. Mariko Welch Harper, MS, FACC, MD performed more echocardiogram (echo), and ultrasound (sonogram) procedures for Medicare patients than 90% of them and she also had a list price for minimally invasive procedures that was lower than the list prices billed to Medicare by 90% 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.

Top 25%

By Volume:

cardiac procedures

Doppler echocardiography

By Affordability:

electrocardiogram

stress EKG

transesophageal echocardiography

In 2012, among providers in related specialties within Washington, Dr. Mariko Welch Harper, MS, FACC, MD performed more cardiac procedures, and Doppler echocardiography procedures for Medicare patients than 75% of them and she also had a list price for electrocardiogram (EKG), stress EKG, and transesophageal echocardiography (TEE) 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

The top procedures that Dr. Mariko Welch Harper, MS, FACC, MD treated as a cardiologist in FEDERAL WAY, WA during 2017 were cardiac procedures, ultrasound (sonogram), stress testing and hospital care.

Volume of procedures performed by Dr. Mariko Welch Harper, MS, FACC, MD for Medicare patients.

cardiac procedures	232
doctor visit	125
hospital care	18
inpatient care	18
minimally invasive procedures	13
stress testing	117
ultrasound (sonogram)	179

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD.

**Gender**
Male	253
Female	190

**Ethnicity**
Non-Hispanic White	375
Black	19
Hispanic	11
Asian	25
Other	0
Native American	0

**Age**
From 65 to 74	153
From 75 to 84	155
85 and over	93
Less than 65	42

Conditions of Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD in 2017

Hypertension	75
High Cholesterol	60
Stroke	10
Ischemic Heart Disease	54
Depression	23
Chronic Kidney Disease	43
Asthma	11
Osteoperosis	7
Atrial Fibrilation	35
Heart Failure	43
Chronic Obstructive Pulmonary Disease	17
Diabetes	34
Dementia	14
Cancer	15

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Mariko Welch Harper, MS, FACC, MD treated as a cardiologist in FEDERAL WAY, WA during 2018 were cardiac procedures, ultrasound (sonogram), stress testing and hospital care.

Volume of procedures performed by Dr. Mariko Welch Harper, MS, FACC, MD for Medicare patients.

blood draw	80
cardiac procedures	1170
cardioversion	19
doctor visit	743
hospital care	224
inpatient care	224
lab tests	19
minimally invasive procedures	63
stress testing	457
ultrasound (sonogram)	1009

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD.

**Gender**
Male	1060
Female	958

**Ethnicity**
Non-Hispanic White	1698
Black	76
Hispanic	52
Asian	118
Other	56
Native American	18

**Age**
From 65 to 74	778
From 75 to 84	743
85 and over	309
Less than 65	188

Conditions of Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD in 2018

Hypertension	72
High Cholesterol	58
Stroke	12
Ischemic Heart Disease	51
Depression	26
Chronic Kidney Disease	40
Asthma	8
Osteoperosis	9
Atrial Fibrilation	32
Heart Failure	37
Chronic Obstructive Pulmonary Disease	15
Diabetes	31
Dementia	14
Cancer	13

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Mariko Welch Harper, MS, FACC, MD treated as a cardiologist in FEDERAL WAY, WA during 2019 were cardiac procedures, ultrasound (sonogram), stress testing and hospital care.

Volume of procedures performed by Dr. Mariko Welch Harper, MS, FACC, MD for Medicare patients.

blood draw	76
cardiac procedures	1157
cardioversion	19
doctor visit	619
hospital care	134
inpatient care	134
lab tests	33
minimally invasive procedures	73
stress testing	428
ultrasound (sonogram)	985

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD.

**Gender**
Male	1064
Female	970

**Ethnicity**
Non-Hispanic White	1739
Black	60
Hispanic	48
Asian	109
Other	61
Native American	17

**Age**
From 65 to 74	737
From 75 to 84	756
85 and over	346
Less than 65	195

Conditions of Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD in 2019

Hypertension	73
High Cholesterol	59
Stroke	10
Ischemic Heart Disease	51
Depression	26
Chronic Kidney Disease	42
Asthma	9
Osteoperosis	9
Atrial Fibrilation	32
Heart Failure	39
Chronic Obstructive Pulmonary Disease	17
Diabetes	31
Dementia	15
Cancer	16

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Mariko Welch Harper, MS, FACC, MD treated as a cardiologist in FEDERAL WAY, WA during 2020 were cardiac procedures, ultrasound (sonogram), stress testing and hospital care.

Volume of procedures performed by Dr. Mariko Welch Harper, MS, FACC, MD for Medicare patients.

blood draw	75
cardiac procedures	664
cardioversion	15
doctor visit	492
hospital care	142
inpatient care	142
lab tests	62
minimally invasive procedures	30
stress testing	211
ultrasound (sonogram)	586

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD.

**Gender**
Male	818
Female	718

**Ethnicity**
Non-Hispanic White	1288
Black	57
Hispanic	40
Asian	78
Other	53
Native American	20

**Age**
From 65 to 74	578
From 75 to 84	545
85 and over	274
Less than 65	139

Conditions of Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD in 2020

Hypertension	71
High Cholesterol	58
Stroke	12
Ischemic Heart Disease	49
Depression	27
Chronic Kidney Disease	42
Asthma	9
Osteoperosis	10
Atrial Fibrilation	32
Heart Failure	38
Chronic Obstructive Pulmonary Disease	14
Diabetes	30
Dementia	16
Cancer	14

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Mariko Welch Harper, MS, FACC, MD treated as a cardiologist in FEDERAL WAY, WA during 2021 were cardiac procedures, ultrasound (sonogram), stress testing and hospital care.

Volume of procedures performed by Dr. Mariko Welch Harper, MS, FACC, MD for Medicare patients.

ambulatory monitoring	12
blood draw	63
cardiac procedures	998
cardioversion	24
doctor visit	649
hospital care	130
inpatient care	130
lab tests	38
minimally invasive procedures	46
stress testing	327
ultrasound (sonogram)	929

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD.

**Gender**
Male	982
Female	937

**Ethnicity**
Non-Hispanic White	1629
Black	75
Hispanic	38
Asian	87
Other	77
Native American	13

**Age**
From 65 to 74	738
From 75 to 84	716
85 and over	311
Less than 65	154

Conditions of Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD in 2021

Hypertension	74
High Cholesterol	58
Stroke	12
Ischemic Heart Disease	49
Depression	24
Chronic Kidney Disease	45
Asthma	8
Osteoperosis	11
Atrial Fibrilation	31
Heart Failure	39
Chronic Obstructive Pulmonary Disease	15
Diabetes	31
Dementia	15
Cancer	14

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Mariko Welch Harper, MS, FACC, MD treated as a cardiologist in FEDERAL WAY, WA during 2022 were cardiac procedures, ultrasound (sonogram), stress testing and hospital care.

Volume of procedures performed by Dr. Mariko Welch Harper, MS, FACC, MD for Medicare patients.

blood draw	92
cardiac procedures	797
cardioversion	21
doctor visit	556
hospital care	112
inpatient care	112
minimally invasive procedures	39
stress testing	245
ultrasound (sonogram)	778

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD.

**Gender**
Male	921
Female	828

**Ethnicity**
Non-Hispanic White	1478
Black	68
Hispanic	33
Asian	75
Other	75
Native American	20

**Age**
From 65 to 74	606
From 75 to 84	672
85 and over	353
Less than 65	118

Conditions of Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD in 2022

Hypertension	75
High Cholesterol	72
Stroke	15
Ischemic Heart Disease	40
Depression	23
Chronic Kidney Disease	29
Asthma	12
Osteoperosis	13
Atrial Fibrilation	42
Heart Failure	35
Chronic Obstructive Pulmonary Disease	15
Diabetes	29
Dementia	12
Cancer	20

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Mariko Welch Harper, MS, FACC, MD treated as a cardiologist in FEDERAL WAY, WA during 2023 were cardiac procedures, ultrasound (sonogram), stress testing and hospital care.

Volume of procedures performed by Dr. Mariko Welch Harper, MS, FACC, MD for Medicare patients.

blood draw	51
cardiac procedures	893
cardioversion	20
doctor visit	631
hospital care	91
inpatient care	91
minimally invasive procedures	35
stress testing	272
ultrasound (sonogram)	839

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD.

**Gender**
Male	791
Female	759

**Ethnicity**
Non-Hispanic White	1337
Black	34
Hispanic	0
Asian	70
Other	78
Native American	0

**Age**
From 65 to 74	550
From 75 to 84	626
85 and over	296
Less than 65	78

Conditions of Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD in 2023

Hypertension	75
High Cholesterol	71
Stroke	16
Ischemic Heart Disease	41
Depression	22
Chronic Kidney Disease	29
Asthma	11
Osteoperosis	14
Atrial Fibrilation	42
Heart Failure	39
Chronic Obstructive Pulmonary Disease	15
Diabetes	29
Dementia	12
Cancer	18

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Mariko Welch Harper, MS, FACC, MD treated as a cardiologist in FEDERAL WAY, WA during 2024 were cardiac procedures, ultrasound (sonogram), stress testing and hospital care.

Volume of procedures performed by Dr. Mariko Welch Harper, MS, FACC, MD for Medicare patients.

blood draw	34
cardiac procedures	717
cardioversion	13
doctor visit	616
hospital care	147
inpatient care	147
minimally invasive procedures	31
stress testing	180
ultrasound (sonogram)	702

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD.

**Gender**
Male	690
Female	695

**Ethnicity**
Non-Hispanic White	1187
Black	29
Hispanic	29
Asian	64
Other	59
Native American	17

**Age**
From 65 to 74	513
From 75 to 84	588
85 and over	229
Less than 65	55

Conditions of Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD in 2024

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	43
Depression	23
Chronic Kidney Disease	29
Asthma	12
Osteoperosis	15
Atrial Fibrilation	44
Heart Failure	41
Chronic Obstructive Pulmonary Disease	17
Diabetes	27
Dementia	10
Cancer	21

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2017 - 2024

Volume of procedures performed by Dr. Mariko Welch Harper, MS, FACC, MD for Medicare patients.

The highest averages for the top procedures that Dr. Mariko Welch Harper, MS, FACC, MD treated as a cardiologist in FEDERAL WAY, WA were cardiac procedures, ultrasound (sonogram), stress testing and hospital care.

ambulatory monitoring	12
blood draw	67
cardiac procedures	828
cardioversion	18
doctor visit	553
hospital care	124
inpatient care	124
lab tests	38
minimally invasive procedures	41
stress testing	279
ultrasound (sonogram)	750

Average Medicare Patient Data From 2017 - 2024

Information about Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD.

**Gender**
Female	756
Male	822

**Ethnicity**
Black / African American	52
Asian / Pacific Islander	78
Non-Hispanic White	1341
Hispanic	31
Native American / Alaskan Native	13
Other	57

**Age**
85 and over	276
75 to 84	600
Less than 65	121
65 to 74	581

Average of Total of Conditions of Medicare patients treated by Dr. Mariko Welch Harper, MS, FACC, MD From 2017 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Mariko Welch Harper, MS, FACC, MD treated were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	73
High Cholesterol	63
Stroke	12
Ischemic Heart Disease	47
Depression	24
Chronic Kidney Disease	37
Asthma	10
Osteoporosis	11
Heart Failure	38
Chronic Obstructive Pulmonary Disease	15
Diabetes	30
Atrial Fibrillation	36
Cancer	16
Dementia	13

Education & Training

She completed residency at University of Washington Affiliated Hospitals. She is certified by the National Board of Echocardiography and has a state license in Washington.

Residency: University of Washington Affiliated Hospitals (2014)

Board Certification: National Board of Echocardiography

Licensed In: Washington

Affiliations & Hospitals

Dr. Mariko Welch Harper, MS, FACC, MD is associated with these hospitals and organizations:

Virginia Mason Franciscan Health

Ratings & Reviews

Dr. Mariko Welch Harper, MS, FACC, MD has an exceptional overall rating with an average of 4.91 out of 5 stars based on 230 ratings. We collect ratings and reviews of Dr. Mariko Welch Harper, MS, FACC, MD from all over the web to help you find the right in FEDERAL WAY, WA.

4.91

Overall Rating

(230 Ratings)

Leave a Review

Reviews From Around The Web

Overall Rating: 5.0 2025-11-04

Patient verified via Press Ganey

Dr. Harper is an incredible person and physician. I truly appreciate her professionalism and her personable nature. I always feel heard, comfortable, and well attended. Dr. Harper has my confidence in everything she says and does. I feel that my health and healing are her primary concern. She always takes her time and I trust her judgement and care. Thank you, Dr. Harper for treating me and my family. My quality of life and outlook are so much more positive because of you and your team.

Overall Rating: 5.0 2024-07-28

Patient verified via Press Ganey

Fortunately, Dr. Harper's main purpose during this visit was to share positive results and to encourage me to continue with the treatment steps that have been working well. In the past, when detailed explanations and treatment options needed to be discussed, she has done an exemplary job. None of that was needed this time.

Overall Rating: 5.0 2024-06-06

Patient verified via Press Ganey

Dr. Harper is without a doubt the most compassionate, kindest most intelligent physician I have ever had. Honestly, Dr. Harper is the only reason I continue to have Virginia Mason as my care provider. If she leaves VM, I am following her out the door. I am so very fortunate to have Dr. Harper care for me.

Overall Rating: 5.0 2024-06-08

Patient verified via Press Ganey

I was very impressed with Dr Harper.She has attributes that are infrequently seen these days.I'm very fortunate to have met the doctor.

Overall Rating: 5.0 2023-08-07

Patient verified via Press Ganey

I am very pleased with Dr. Harper. Her recommendations are alway well thought through a thoroughly explained.

Overall Rating: 5.0 2025-12-22

Patient verified via Press Ganey

The most important element of care is trust. I've felt I can trust dr Harper from the start.

Overall Rating: 5.0 2024-06-30

Patient verified via Press Ganey

Dr Harper is very compassionate and does a great job explaining things in layman's terms.

Overall Rating: 5.0 2026-05-02

Patient verified via Press Ganey

Time with Dr Harper, her RN and the RN Asst were all positive

Overall Rating: 5.0 2025-08-26

Patient verified via Press Ganey

I trust her opinions

General Payments

These charts describe general payments received by Dr. Mariko Welch Harper, MS, FACC, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
E.R. Squibb & Sons, L.L.C.	$139,042 CAMZYOS $99,644	$39,397
Boehringer Ingelheim Pharmaceuticals, Inc.	$282 JARDIANCE $204	$77
Medtronic, Inc.	$130 Avalus $130
Novo Nordisk Inc	$34 Wegovy $34
Amgen Inc.	$24 $24
Other	$37 Barostim Neo System $22	WATCHMAN FLX $15

**Types of Payments**
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$89,065
Consulting Fee	$27,300
Travel and Lodging	$20,216
Food and Beverage	$2,967

Research Payments

Dr. Mariko Welch Harper, MS, FACC, MD has received 4 research payments totaling $76,015.

Biography

Dr. Mariko Harper is an adult cardiology specialist. She trained at a hospital affiliated with the University of Washington for residency. On average, patients gave Dr. Harper a rating of 5.0 stars (out of 5). She speaks Japanese. Dr. Harper is professionally affiliated with Virginia Mason Franciscan Health. Her practice in FEDERAL WAY, WA is open to new patients as reported by Doctor.com.