Mariko Welch Harper, MD
NPI 1336448513ActiveIndividual· Internal Medicine, Cardiovascular Disease· Seattle, WA
Internal Medicine, Cardiovascular Disease (MD) with Virginia Mason Medical Center, practicing in Seattle, Washington. Their prescriptions cost Medicare Part D more than their services did: $4,253,518 for 3,019 claims, against $143,013 paid for services in 2024. E.R. Squibb & Sons, L.L.C. was the largest of 3 companies reporting payments in 2025, $106,220 in all, mostly speaking and faculty fees. Lists Bartlett Regional Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1336448513 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 27, 2011 |
| Last updated in NPPES | Mar 17, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | MD60395120 | WA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiovascular Disease (Cardiology) (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,385 |
|---|---|
| Services billed | 3,662 across 66 procedure codes |
| Paid by Medicare | $143,013 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,019 · 7,184 30-day fills |
|---|---|
| Patients | 384 |
| Total drug cost | $4,253,518 |
| Generic share | 70% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Virginia Mason Medical CenterSeattle, WA · 867 clinicians
Hospital affiliations
- Bartlett Regional HospitalJuneau, AK
- Highline Medical CenterBurien, WA
- St Michael Medical CenterSilverdale, WA
- Virginia Mason Medical CenterSeattle, WA
- Whidbeyhealth Medical CenterCoupeville, WA
Industry payments (Open Payments)
- 2025$106,220 · 91 payments from 3 companies
- 2024$64,572 · 60 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| E.R. Squibb & Sons, L.L.C. | $91,632 | 78 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $12,749 | 11 |
| Lilly USA, LLC | $1,838 | 2 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$82,587 · 20 payments
- Consulting Fee$11,300 · 5 payments
- Travel and Lodging$9,877 · 35 payments
- Food and Beverage$2,456 · 31 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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