Ryan Thomas Callahan, DPM
NPI 1265010284ActiveIndividual· Podiatrist· Boston, MA
Podiatrist (DPM) in Boston, Massachusetts, licensed in CA, with an NPI issued in March 2021. Part D covered 11 prescriptions written in 2024, 100% of them generic. Stryker Corporation was the largest of 2 companies reporting payments in 2025, $1,412 in all, mostly travel and lodging.
Overview
| NPI | 1265010284 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DPM |
| Sole proprietor | No |
| NPI issued | Mar 31, 2021 |
| Last updated in NPPES | Feb 12, 2026 |
| Certified by provider | Feb 12, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Podiatrist Primary | 213E00000X | E6042 | CA |
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 - Podiatry (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 11 · 11 30-day fills |
|---|---|
| Total drug cost | $47.64 |
| Generic share | 100% of claims |
Industry payments (Open Payments)
- 2025$1,412 · 4 payments from 2 companies
- 2024$32.00 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Stryker Corporation | $1,396 | 3 |
| Bioventus LLC | $15.32 | 1 |
What the 2025 payments were for
- Travel and Lodging$1,353 · 1 payment
- Food and Beverage$58.99 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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