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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Susan M Amster, PA C

Medical Physician Assistant in Westport, CT · enumerated 2006.

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

National Provider Identifier

1164598322

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Registry record

Entity type Individual (Type 1)
Name Ms. Susan M Amster
Credential PA C
Sex Female
Practice address 1563 Post Road East, Westport, CT, 06880
Phone (203) 319-3939
Fax (203) 319-3966
Enumeration date Nov 28, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

363AM0700X Medical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 000006 (CT) Primary

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.

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Frequently asked questions

How do I verify Susan Amster's NPI record?
Cross-check NPI 1164598322 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1164598322 active?
Yes, as of the latest NPPES snapshot, NPI 1164598322 is active (record last updated 2007-07-08).

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