Michael A. Kilgannon, M.D.
NPI 1164483947ActiveIndividual· Internal Medicine· Willimantic, CT
Internal Medicine (M.D.) in Willimantic, Connecticut, licensed in CT, with an NPI issued in March 2006. Their prescriptions cost Medicare Part D more than their services did: $173,740 for 2,609 claims, against $1,011 paid for services in 2024.
Overview
| NPI | 1164483947 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Mar 31, 2006 |
| Last updated in NPPES | Sep 4, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 025777 | CT |
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 - Internal Medicine (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 11 |
|---|---|
| Services billed | 16 across 5 procedure codes |
| Paid by Medicare | $1,011 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,609 · 2,623 30-day fills |
|---|---|
| Patients | 78 |
| Total drug cost | $173,740 |
| Generic share | 84% 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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All 28 internal medicine physicians in Willimantic · All internal medicine physicians in Connecticut