John Greally, M.B., PH.D
NPI 1821227646 · Clinical Genetics (M.D.) Physician · Bronx, NY
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Greally, M.B., PH.D is a Clinical Genetics (M.D.) Physician provider in Bronx, NY (NPI 1821227646).
Provider details
- NPI number
- 1821227646
- Entity type
- Individual
- Primary specialty
- Clinical Genetics (M.D.) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.B., PH.D
- Sex
- Male
- Sole proprietor
- No
- License
- 226186 (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
16 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
- 2009-07-14
- Last updated
- 2009-07-14
Frequently asked questions
- What is John Greally's NPI number?
- John Greally's National Provider Identifier (NPI) is 1821227646, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Greally's specialty?
- John Greally is listed in the NPPES registry with a primary specialty of Clinical Genetics (M.D.) Physician (Allopathic & Osteopathic Physicians).
- Where is John Greally located?
- John Greally's practice location on file with NPPES is 3415 Bainbridge Ave, Bronx, NY 10467-2403.
- What is John Greally's phone number?
- The practice phone number listed in the NPPES registry for John Greally is (718) 741-2487.
- Does John Greally accept Medicare?
- John Greally is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Greally's NPI active?
- Yes — John Greally's NPI (1821227646) is active in the NPPES registry as of the last update on 2009-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.