John W. Diefenderfer, D.O.
NPI 1407236185ActiveIndividual· Family Medicine· Waterville, ME
Family Medicine (D.O.) with Mainegeneral Medical Center, practicing in Waterville, Maine. Mostly services rather than prescriptions: Medicare paid $4,010 for 44 patients in 2024, with only 39 Part D claims. Lists Maine General Medical Center as a hospital affiliation.
Overview
| NPI | 1407236185 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | Yes |
| NPI issued | Jun 8, 2015 |
| Last updated in NPPES | Jan 20, 2021 |
| Certified by provider | Jan 20, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | DO2785 | ME |
| Family Medicine | 207Q00000X | UO 4638 | FL |
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 - Osteopathic Manipulative Medicine (ME) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 44 |
|---|---|
| Services billed | 90 across 11 procedure codes |
| Paid by Medicare | $4,010 |
Part D prescriptions in 2024
| Prescriptions (claims) | 39 · 39 30-day fills |
|---|---|
| Total drug cost | $5,088 |
| Generic share | 67% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Osteopathic Manipulative Medicine |
Medical group
- Mainegeneral Medical CenterWaterville, ME · 555 clinicians
Hospital affiliation
- Maine General Medical CenterAugusta, ME
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 53 family medicine physicians in Waterville · All family medicine physicians in Maine