Mark M. Theiss, M.D.
NPI 1669534350ActiveIndividual· Orthopaedic Surgery, Sports Medicine· Falls Church, VA
Orthopaedic Surgery, Sports Medicine (M.D.) in Falls Church, Virginia, trained at Georgetown University School of Medicine (class of 1975). In 2024 Medicare paid $136,198 for 323 patients, and Part D covered 384 of their prescriptions, 83% of them generic. Stryker Corporation reported $316.30 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1669534350 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 16, 2006 |
| Last updated in NPPES | Jan 29, 2022 |
| Certified by provider | Jan 29, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery, Sports Medicine Primary | 207XX0005X | 0101036798 | VA |
| Orthopaedic Surgery | 207X00000X | 0101036798 | VA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Sports Medicine (DC); Practitioner - Sports Medicine (VA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 323 |
|---|---|
| Services billed | 3,601 across 38 procedure codes |
| Paid by Medicare | $136,198 |
Part D prescriptions in 2024
| Prescriptions (claims) | 384 · 422 30-day fills |
|---|---|
| Patients | 118 |
| Total drug cost | $27,568 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Georgetown University School of Medicine |
|---|---|
| Graduation year | 1975 |
| Medicare specialty | Sports Medicine |
| Secondary specialties | Orthopedic Surgery |
Medical group
- Inova Health Care ServicesAlexandria, VA · 1,817 clinicians
Hospital affiliations
- Inova Alexandria HospitalAlexandria, VA
- Inova Fair Oaks HospitalFairfax, VA
- Inova Loudoun HospitalLeesburg, VA
Industry payments (Open Payments)
- 2025$316.30 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Stryker Corporation | $316.30 | 2 |
What the 2025 payments were for
- Food and Beverage$316.30 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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