Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ian Greenstein

Pharmacist in Falmouth, ME · enumerated 2021.

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

National Provider Identifier

1952980633

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Registry record

Entity type Individual (Type 1)

Name Ian Greenstein

Sex Male

Practice address 206 Us Route 1 Stop 3, Falmouth, ME, 04105

Phone (207) 781-3754

Enumeration date Apr 7, 2021

Last updated in NPPES Apr 7, 2021

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License PR69014 (ME) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Ian Greenstein practice?

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

What is the NPI number for Ian Greenstein?

The National Provider Identifier (NPI) for Ian Greenstein is 1952980633, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-07.