Tobin Scott Naidorf, MD
NPI 1457306318ActiveIndividual· Internal Medicine, Gastroenterology· Alexandria, VA
Internal Medicine, Gastroenterology (MD) in Alexandria, Virginia, trained at Eastern Virginia Medical School (class of 1984). In 2024 Medicare paid $61,418 for 246 patients, and Part D covered 209 of their prescriptions, 84% of them generic. Ardelyx, Inc. reported $134.33 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1457306318 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | May 22, 2006 |
| Last updated in NPPES | Aug 9, 2022 |
| Certified by provider | Aug 9, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 0101043875 | VA |
| Internal Medicine | 207R00000X | 0101043875 | VA |
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 - Gastroenterology (DC); Practitioner - Internal Medicine (VA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 246 |
|---|---|
| Services billed | 437 across 14 procedure codes |
| Paid by Medicare | $61,418 |
Part D prescriptions in 2024
| Prescriptions (claims) | 209 · 414 30-day fills |
|---|---|
| Patients | 119 |
| Total drug cost | $38,342 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | Eastern Virginia Medical School |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Inova Health Care ServicesAlexandria, VA · 1,817 clinicians
Hospital affiliation
- Inova Mount Vernon HospitalAlexandria, VA
Industry payments (Open Payments)
- 2025$134.33 · 1 payment from 1 company
- 2024$255.82 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ardelyx, Inc. | $134.33 | 1 |
What the 2025 payments were for
- Food and Beverage$134.33 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other gastroenterologists in Alexandria
- 1033145586
- 1205242591
- 1295768240
- 1437324894
- 1497800841
- 1528420437
- 1629123096
- 1629232723
- 1659364511
- 1700936598
- 1740209147
- 1750811964
All 36 gastroenterologists in Alexandria · All gastroenterologists in Virginia