Ronald E. Mason, MD
NPI 1124088430ActiveIndividual· Internal Medicine, Gastroenterology· Kirkland, WA
Internal Medicine, Gastroenterology (MD) in Kirkland, Washington, trained at University of Alabama School of Medicine (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $416,689 for 1,161 claims, against $154,487 paid for services in 2024. Salix Pharmaceuticals, A Division of Bausch Health US, LLC was the largest of 13 companies reporting payments in 2025, $842.19 in all, mostly food and beverage.
Overview
| NPI | 1124088430 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 23, 2006 |
| Last updated in NPPES | Mar 25, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | MD00042393 | WA |
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 | 269 |
|---|---|
| Services billed | 6,121 across 27 procedure codes |
| Paid by Medicare | $154,487 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,161 · 1,821 30-day fills |
|---|---|
| Patients | 281 |
| Total drug cost | $416,689 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | University of Alabama School of Medicine |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Gastroenterology |
Medical group
- Puget Sound Gastroenterology PLLCEdmonds, WA · 61 clinicians
Hospital affiliation
- Evergreenhealth Medical CenterKirkland, WA
Industry payments (Open Payments)
- 2025$842.19 · 35 payments from 13 companies
- 2024$772.94 · 31 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $166.98 | 7 |
| Takeda Pharmaceuticals U.S.A., Inc. | $138.81 | 4 |
| Aimmune Therapeutics, Inc. | $106.84 | 4 |
| Janssen Biotech, Inc. | $98.66 | 4 |
| Regeneron Healthcare Solutions, Inc. | $71.06 | 3 |
What the 2025 payments were for
- Food and Beverage$842.19 · 35 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other gastroenterologists in Kirkland
- 1184603425
- 1194255232
- 1255742730
- 1538148879
- 1710255591
- 1801909692
- 1851353734
- 1003844622
- 1033162334
- 1689134975
- 1427185388
- 1811976152
All 15 gastroenterologists in Kirkland · All gastroenterologists in Washington