Peter Grekin, M.D.
NPI 1821081506 · Emergency Medical Services (Emergency Medicine) Physician · New York, NY
Enrolled with Medicare as Order and Referring Only - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Grekin, M.D. is a Emergency Medical Services (Emergency Medicine) Physician provider in New York, NY (NPI 1821081506).
Provider details
- NPI number
- 1821081506
- Entity type
- Individual
- Primary specialty
- Emergency Medical Services (Emergency Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 216692 (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
- 2005-08-26
- Last updated
- 2007-07-08
Frequently asked questions
- What is Peter Grekin's NPI number?
- Peter Grekin's National Provider Identifier (NPI) is 1821081506, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Grekin's specialty?
- Peter Grekin is listed in the NPPES registry with a primary specialty of Emergency Medical Services (Emergency Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Grekin located?
- Peter Grekin's practice location on file with NPPES is 423 E 23rd St, New York, NY 10010-5011.
- What is Peter Grekin's phone number?
- The practice phone number listed in the NPPES registry for Peter Grekin is (212) 686-7500.
- Does Peter Grekin accept Medicare?
- Peter Grekin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Grekin's NPI active?
- Yes — Peter Grekin's NPI (1821081506) 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.