Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Seymour H Fein, M.D.

Q: What is the NPI number for Seymour Fein?

The National Provider Identifier (NPI) for Seymour Fein is 1598886723, a Type 1 (individual) record in the CMS NPPES registry.

Internal Medicine Physician in New Canaan, CT · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1598886723

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Registry record

Entity type Individual (Type 1)

Name Seymour H Fein

Credential M.D.

Sex Male

Practice address 476 Canoe Hill Rd, New Canaan, CT, 06840

Phone (203) 972-8823

Enumeration date Apr 3, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 41399 (MA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Seymour Fein practice?

The practice location on file with NPPES is in New Canaan, CT. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Seymour Fein?

The National Provider Identifier (NPI) for Seymour Fein is 1598886723, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.