Catherine O'Neill, MD
NPI 1992745194 · Internal Medicine Physician · Buffalo, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Catherine O'Neill, MD is a Internal Medicine Physician provider in Buffalo, NY (NPI 1992745194).
Provider details
- NPI number
- 1992745194
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- License
- 178896 (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
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-07
- Last updated
- 2007-07-08
Frequently asked questions
- What is Catherine O'Neill's NPI number?
- Catherine O'Neill's National Provider Identifier (NPI) is 1992745194, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine O'Neill's specialty?
- Catherine O'Neill is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Catherine O'Neill located?
- Catherine O'Neill's practice location on file with NPPES is 100 High St, Buffalo, NY 14203-1126.
- What is Catherine O'Neill's phone number?
- The practice phone number listed in the NPPES registry for Catherine O'Neill is (716) 859-2589.
- Does Catherine O'Neill accept Medicare?
- Catherine O'Neill is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Catherine O'Neill's NPI active?
- Yes — Catherine O'Neill's NPI (1992745194) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.