Sheldon Alter, M.D.
NPI 1427051143 · Internal Medicine Physician · Purchase, NY
Sheldon Alter, M.D. is a Internal Medicine Physician provider in Purchase, NY (NPI 1427051143).
Provider details
- NPI number
- 1427051143
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 087681 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
21 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
- 2005-05-27
- Last updated
- 2016-01-21
Frequently asked questions
- What is Sheldon Alter's NPI number?
- Sheldon Alter's National Provider Identifier (NPI) is 1427051143, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sheldon Alter's specialty?
- Sheldon Alter is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sheldon Alter located?
- Sheldon Alter's practice location on file with NPPES is 3030 Westchester Ave, Purchase, NY 10577-2574.
- What is Sheldon Alter's phone number?
- The practice phone number listed in the NPPES registry for Sheldon Alter is (914) 831-2900.
- Is Sheldon Alter's NPI active?
- Yes — Sheldon Alter's NPI (1427051143) is active in the NPPES registry as of the last update on 2016-01-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.