Michael Kilgannon, M.D.
NPI 1164483947 · Internal Medicine Physician · Willimantic, CT
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Kilgannon, M.D. is a Internal Medicine Physician provider in Willimantic, CT (NPI 1164483947).
Provider details
- NPI number
- 1164483947
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 025777 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 65 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 232 | 23 |
| Apixabanbrand: Eliquis | 129 | — |
| Escitalopram Oxalate | 96 | — |
| Omeprazole | 96 | 14 |
| Levothyroxine Sodium | 88 | — |
| Amlodipine Besylate | 81 | — |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-31
- Last updated
- 2019-09-04
Frequently asked questions
- What is Michael Kilgannon's NPI number?
- Michael Kilgannon's National Provider Identifier (NPI) is 1164483947, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Kilgannon's specialty?
- Michael Kilgannon is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Kilgannon located?
- Michael Kilgannon's practice location on file with NPPES is 1703 Main St, Willimantic, CT 06226-1162.
- What is Michael Kilgannon's phone number?
- The practice phone number listed in the NPPES registry for Michael Kilgannon is (860) 456-1252.
- Does Michael Kilgannon accept Medicare?
- Michael Kilgannon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Kilgannon's NPI active?
- Yes — Michael Kilgannon's NPI (1164483947) is active in the NPPES registry as of the last update on 2019-09-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.