Hassan Yassin Zammam, MD
NPI 1629041785ActiveIndividual· Internal Medicine· Altoona, PA
Internal Medicine (MD) with Phoenix Rehabilitation and Health Services Inc and 2 other groups, practicing in Altoona, Pennsylvania. Their prescriptions cost Medicare Part D more than their services did: $1,802,929 for 19,379 claims, against $118,954 paid for services in 2024. Glaxosmithkline, LLC. was the largest of 3 companies reporting payments in 2025, $375.00 in all, mostly food and beverage. Lists Conemaugh Nason Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1629041785 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Feb 9, 2006 |
| Last updated in NPPES | Sep 3, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | MD063574L | PA |
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 - Internal Medicine (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 953 |
|---|---|
| Services billed | 3,440 across 59 procedure codes |
| Paid by Medicare | $118,954 |
Part D prescriptions in 2024
| Prescriptions (claims) | 19,379 · 37,914 30-day fills |
|---|---|
| Patients | 1,077 |
| Total drug cost | $1,802,929 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 1991 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Phoenix Rehabilitation and Health Services IncCranberry Twp, PA · 2,800 clinicians
- Vantage Physical Therapy and Rehabilitation IncJohnstown, PA · 260 clinicians
- Upmc Altoona Regional Health Services, Inc.Altoona, PA · 187 clinicians
Hospital affiliations
- Conemaugh Nason Medical CenterRoaring Spring, PA
- Mount Nittany Medical CenterState College, PA
- Penn Highlands TyroneTyrone, PA
- Upmc AltoonaAltoona, PA
- Upmc Bedford MemorialEverett, PA
Other facilities
- Nason Hospital Home Health AgencyHome health agency · Roaring Spring, PA
- Upmc Home Healthcare of Central PennsylvaniaHome health agency · Altoona, PA
- Family HospiceHospice · Altoona, PA
- Gentiva IIHospice · Altoona, PA
- Pinnacle Hospice, LLCHospice · Sewickley, PA
Industry payments (Open Payments)
- 2025$375.00 · 3 payments from 3 companies
- 2024$194.70 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaxosmithkline, LLC. | $125.00 | 1 |
| Genzyme Corporation | $125.00 | 1 |
| Axsome Therapeutics, Inc. | $125.00 | 1 |
What the 2025 payments were for
- Food and Beverage$375.00 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 50 internal medicine physicians in Altoona · All internal medicine physicians in Pennsylvania