Melissa Tiyouh, M.D.
NPI 1265846679ActiveIndividual· Internal Medicine, Infectious Disease· Chambersburg, PA
Internal Medicine, Infectious Disease (M.D.) with Keystone Rural Health Center, practicing in Chambersburg, Pennsylvania. Their prescriptions cost Medicare Part D more than their services did: $536,527 for 820 claims, against $38,120 paid for services in 2024. Abbvie Inc. was the largest of 7 companies reporting payments in 2025, $511.43 in all, mostly food and beverage. Lists Gettysburg Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1265846679 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 13, 2014 |
| Last updated in NPPES | Apr 23, 2025 |
| Certified by provider | Apr 23, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | MD466393 | 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 - Infectious Disease (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 290 |
|---|---|
| Services billed | 533 across 10 procedure codes |
| Paid by Medicare | $38,120 |
Part D prescriptions in 2024
| Prescriptions (claims) | 820 · 902 30-day fills |
|---|---|
| Patients | 153 |
| Total drug cost | $536,527 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2014 |
|---|---|
| Medicare specialty | Infectious Disease |
| Telehealth | Offers telehealth |
Medical group
- Keystone Rural Health CenterChambersburg, PA · 43 clinicians
Hospital affiliations
- Gettysburg HospitalGettysburg, PA
- Wellspan Chambersburg HospitalChambersburg, PA
- Wellspan Waynesboro HospitalWaynesboro, PA
Other facilities
- Wellspan Vna Home CareHome health agency · York, PA
Industry payments (Open Payments)
- 2025$511.43 · 22 payments from 7 companies
- 2024$333.51 · 15 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $197.09 | 8 |
| Merck Sharp & Dohme LLC | $86.73 | 4 |
| Gilead Sciences, Inc. | $73.11 | 4 |
| Viiv Healthcare Company | $62.67 | 2 |
| Pfizer Inc. | $47.21 | 2 |
What the 2025 payments were for
- Food and Beverage$511.43 · 22 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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