Peter Greenspan, MD
NPI 1295725885 · Pediatrics Physician · Waltham, MA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Greenspan, MD is a Pediatrics Physician provider in Waltham, MA (NPI 1295725885).
Provider details
- NPI number
- 1295725885
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 44159 (MA)
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
- 2005-10-25
- Last updated
- 2014-06-05
Frequently asked questions
- What is Peter Greenspan's NPI number?
- Peter Greenspan's National Provider Identifier (NPI) is 1295725885, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Greenspan's specialty?
- Peter Greenspan is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Greenspan located?
- Peter Greenspan's practice location on file with NPPES is 40 2nd Ave, Waltham, MA 02451-1137.
- What is Peter Greenspan's phone number?
- The practice phone number listed in the NPPES registry for Peter Greenspan is (781) 487-4340.
- Does Peter Greenspan accept Medicare?
- Peter Greenspan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Greenspan's NPI active?
- Yes — Peter Greenspan's NPI (1295725885) is active in the NPPES registry as of the last update on 2014-06-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.