David Benjamin Liang, M.D.
NPI 1619178027ActiveIndividual· Internal Medicine, Gastroenterology· Edmonds, WA
Internal Medicine, Gastroenterology (M.D.) in Edmonds, Washington, trained at George Washington University School of Medicine (class of 2004). Their prescriptions cost Medicare Part D more than their services did: $229,834 for 1,204 claims, against $85,618 paid for services in 2024. Abbvie Inc. was the largest of 5 companies reporting payments in 2025, $160.62 in all, mostly food and beverage.
Overview
| NPI | 1619178027 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 31, 2007 |
| Last updated in NPPES | Oct 11, 2024 |
| Certified by provider | Oct 11, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | MD60197486 | WA |
| Internal Medicine, Gastroenterology | 207RG0100X | 14761 | NV |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 451 |
|---|---|
| Services billed | 773 across 35 procedure codes |
| Paid by Medicare | $85,618 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,204 · 1,919 30-day fills |
|---|---|
| Patients | 421 |
| Total drug cost | $229,834 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | George Washington University School of Medicine |
|---|---|
| Graduation year | 2004 |
| Medicare specialty | Gastroenterology |
Medical groups
- Yakima Valley Memorial PhysiciansYakima, WA · 391 clinicians
- PeacehealthBellingham, WA · 298 clinicians
Hospital affiliations
- Peacehealth St Joseph Medical CenterBellingham, WA
- Yakima Valley MemorialYakima, WA
Industry payments (Open Payments)
- 2025$160.62 · 7 payments from 5 companies
- 2024$23.52 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $52.12 | 2 |
| Aimmune Therapeutics, Inc. | $36.57 | 2 |
| Boston Scientific Corporation | $28.44 | 1 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $23.61 | 1 |
| Janssen Biotech, Inc. | $19.88 | 1 |
What the 2025 payments were for
- Food and Beverage$160.62 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 18 gastroenterologists in Edmonds · All gastroenterologists in Washington