Seymour Alter MD
NPI 1871671909 · Internal Medicine Physician · Smithtown, NY
Seymour Alter MD is a Internal Medicine Physician organization in Smithtown, NY (NPI 1871671909).
Provider details
- NPI number
- 1871671909
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Seymour Alter, MD(631) 265-1177
- License
- 120634 (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
19 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
- 2006-11-02
- Last updated
- 2008-06-18
Frequently asked questions
- What is Seymour Alter MD's NPI number?
- Seymour Alter MD's National Provider Identifier (NPI) is 1871671909, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Seymour Alter MD?
- Seymour Alter MD is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Seymour Alter MD located?
- Seymour Alter MD's practice location on file with NPPES is 222 E Main St, Smithtown, NY 11787-2871.
- What is Seymour Alter MD's phone number?
- The practice phone number listed in the NPPES registry for Seymour Alter MD is (631) 265-1177.
- Who is the authorized official for Seymour Alter MD?
- The authorized official listed on Seymour Alter MD's NPPES record is Seymour Alter, MD. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Seymour Alter MD's NPI active?
- Yes — Seymour Alter MD's NPI (1871671909) is active in the NPPES registry as of the last update on 2008-06-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.