Nancy K. Lonsdorf, M.D.
NPI 1689792939ActiveIndividual· General Practice· Fairfield, IA
Opted out of Medicare from May 2016 to May 2028. General Practice (M.D.) in Fairfield, Iowa, licensed in IA, with an NPI issued in March 2007. Part D covered 44 prescriptions written in 2024, 98% of them generic.
Overview
| NPI | 1689792939 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 26, 2007 |
| Last updated in NPPES | Dec 30, 2019 |
| Certified by provider | Dec 30, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| General Practice Primary | 208D00000X | 25776 | IA |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out May 6, 2016 – May 6, 2028 |
| Can order and refer | Yes |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Part D prescriptions in 2024
| Prescriptions (claims) | 44 · 62 30-day fills |
|---|---|
| Total drug cost | $1,021 |
| Generic share | 98% of claims |
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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