Michael Alfonzo, M.D.
NPI 1932337326 · Pediatric Emergency Medicine (Pediatrics) Physician · New York, NY
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Alfonzo, M.D. is a Pediatric Emergency Medicine (Pediatrics) Physician provider in New York, NY (NPI 1932337326).
Provider details
- NPI number
- 1932337326
- Entity type
- Individual
- Primary specialty
- Pediatric Emergency Medicine (Pediatrics) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 51156 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 5 Perryridge RdGreenwich, CT 06830-4608Phone: (203) 863-3000Fax: (203) 688-8050
Registry dates
- Enumerated
- 2009-06-24
- Last updated
- 2020-03-09
- Certified
- 2020-03-09
Frequently asked questions
- What is Michael Alfonzo's NPI number?
- Michael Alfonzo's National Provider Identifier (NPI) is 1932337326, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Alfonzo's specialty?
- Michael Alfonzo is listed in the NPPES registry with a primary specialty of Pediatric Emergency Medicine (Pediatrics) Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Alfonzo located?
- Michael Alfonzo's practice location on file with NPPES is 525 E 68th St, New York, NY 10065-4870.
- What is Michael Alfonzo's phone number?
- The practice phone number listed in the NPPES registry for Michael Alfonzo is (212) 746-3300.
- Does Michael Alfonzo accept Medicare?
- Michael Alfonzo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Alfonzo's NPI active?
- Yes — Michael Alfonzo's NPI (1932337326) is active in the NPPES registry as of the last update on 2020-03-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.