Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. SEYMOUR ALTER M.D.
NPI 1750336251
Specialist in Smithtown, NY

Q: What is Seymour Alter's NPI number?

The NPI number for Seymour Alter is 1750336251. It was assigned to this individual provider in the NPPES registry on May 23, 2006.

Q: What is Seymour Alter's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Q: When was this NPI record last updated?

The NPPES record for Seymour Alter was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since May 23, 2006PECOS Enrolled

222 MIDDLE COUNTRY RD, SUITE 109, SMITHTOWN, NY 11787(631) 265-7711(631) 265-1225 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

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About Dr. Seymour Alter M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. SEYMOUR ALTER M.D. (NPI 1750336251) is an individual specialist in Smithtown, New York, licensed in New York (114051) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1750336251

Entity TypeIndividualMale

Primary Taxonomy174400000X

Provider Legal NameDR. SEYMOUR ALTERCredential: M.D.

Location Address222 MIDDLE COUNTRY RD, SUITE 109Smithtown, NY 11787-2871

Mailing Address222 Middle Country Rd, Suite 109Smithtown, NY 11787-2871 · (631) 265-7711 · Fax (631) 265-1225

Phone(631) 265-7711

Fax(631) 265-1225

Sole ProprietorNo

Enumeration DateMay 23, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1750336251 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers

Taxonomy Code174400000X

License✔ Licensed in NY · 114051

Definition

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

222 MIDDLE COUNTRY RD, Smithtown, NY 11787

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Other Identifiers 2

Medicaid00425181NY

Other114051NY · License

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Seymour Alter M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.