Nancy Colligan, MD
NPI 1184635526 · Internal Medicine Physician · Amherst, NY
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Colligan, MD is a Internal Medicine Physician provider in Amherst, NY (NPI 1184635526).
Provider details
- NPI number
- 1184635526
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 152552 (NY)
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
19 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-11
- Last updated
- 2008-01-03
Frequently asked questions
- What is Nancy Colligan's NPI number?
- Nancy Colligan's National Provider Identifier (NPI) is 1184635526, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Colligan's specialty?
- Nancy Colligan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Colligan located?
- Nancy Colligan's practice location on file with NPPES is 3980 Sheridan Dr, Amherst, NY 14226-1727.
- What is Nancy Colligan's phone number?
- The practice phone number listed in the NPPES registry for Nancy Colligan is (716) 961-9900.
- Does Nancy Colligan accept Medicare?
- Nancy Colligan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Colligan's NPI active?
- Yes — Nancy Colligan's NPI (1184635526) is active in the NPPES registry as of the last update on 2008-01-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.