Mark Alexander Calderwood, MD
NPI 1447353024ActiveIndividual· Ophthalmology· Hamilton, MT
Ophthalmology (MD) in Hamilton, Montana, licensed in MT, with an NPI issued in September 2006. Part D covered 524 prescriptions written in 2024, 55% of them generic.
Overview
| NPI | 1447353024 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Sep 7, 2006 |
| Last updated in NPPES | Nov 12, 2024 |
| Certified by provider | Nov 12, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | MED-PHYS-LIC-7129 | MT |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Ophthalmology (MT) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 524 · 848 30-day fills |
|---|---|
| Patients | 125 |
| Total drug cost | $79,087 |
| Generic share | 55% of claims |
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Ophthalmology providers in Hamilton
- 1285676445