John Wah, M.D.
NPI 1265727580ActiveIndividual· Internal Medicine· Westminster, MD
Internal Medicine (M.D.) with Expanding Medicine LLC, practicing in Westminster, Maryland. In 2024 Medicare paid $286,787 for 235 patients, and Part D covered 4,698 of their prescriptions, 82% of them generic. Lists Frederick Health Hospital as a hospital affiliation.
Overview
| NPI | 1265727580 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 15, 2011 |
| Last updated in NPPES | Nov 12, 2025 |
| Certified by provider | Nov 12, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | D0077578 | MD |
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 - Geriatric Medicine (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 235 |
|---|---|
| Services billed | 3,020 across 12 procedure codes |
| Paid by Medicare | $286,787 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,698 · 4,711 30-day fills |
|---|---|
| Patients | 160 |
| Total drug cost | $338,730 |
| Generic share | 82% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Geriatric Medicine |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Expanding Medicine LLCManchester, MD · 3 clinicians
Hospital affiliation
- Frederick Health HospitalFrederick, MD
Other facilities
- Bridginglife, Inc.Hospice · Westminster, MD
- Frederick Health HospiceHospice · Frederick, MD
- Autumn Lake Healthcare at Ballenger CreekNursing home · Frederick, MD
- Autumn Lake Healthcare at Birch ManorNursing home · Sykesville, MD
- Autumn Lake Healthcare at Braddock HeightsNursing home · Frederick, MD
- Autumn Lake Healthcare at Glade ValleyNursing home · Walkersville, MD
- Autumn Lake Healthcare at Long ViewNursing home · Manchester, MD
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 54 internal medicine physicians in Westminster · All internal medicine physicians in Maryland