Mark Thomas Watkins, DO
NPI 1336226166ActiveIndividual· Family Medicine, Adult Medicine· Philadelphia, PA
Family Medicine, Adult Medicine (DO) in Philadelphia, Pennsylvania, trained at Philadelphia College of Osteopathic Medicine (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $4,430,581 for 4,879 claims, against $37,408 paid for services in 2024. Viiv Healthcare Company was the largest of 6 companies reporting payments in 2025, $1,746 in all, mostly food and beverage.
Overview
| NPI | 1336226166 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | Yes |
| NPI issued | Nov 1, 2006 |
| Last updated in NPPES | May 26, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine, Adult Medicine Primary | 207QA0505X | OS006195L | 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 - General Practice (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 159 |
|---|---|
| Services billed | 837 across 31 procedure codes |
| Paid by Medicare | $37,408 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,879 · 8,489 30-day fills |
|---|---|
| Patients | 190 |
| Total drug cost | $4,430,581 |
| Generic share | 65% of claims |
Education and affiliations
| Medical school | Philadelphia College of Osteopathic Medicine |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | General Practice |
Medical group
- Mazzoni CenterPhiladelphia, PA · 6 clinicians
Hospital affiliations
- Hospital of Univ of PennsylvaniaPhiladelphia, PA
- Pennsylvania HospitalPhiladelphia, PA
Other facilities
- Penn Medicine Home HealthHome health agency · Bala Cynwyd, PA
Industry payments (Open Payments)
- 2025$1,746 · 72 payments from 6 companies
- 2024$1,815 · 67 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Viiv Healthcare Company | $787.71 | 31 |
| Gilead Sciences, Inc. | $556.45 | 25 |
| Merck Sharp & Dohme LLC | $165.82 | 9 |
| Lilly USA, LLC | $148.67 | 3 |
| Theratechnologies Inc. | $61.54 | 3 |
What the 2025 payments were for
- Food and Beverage$1,746 · 72 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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