Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jan Stephen Close, M.D.

Q: What is the NPI number for Jan Close?

The National Provider Identifier (NPI) for Jan Close is 1891867180, a Type 1 (individual) record in the CMS NPPES registry.

Internal Medicine Physician in Potsdam, NY · enumerated 2006.

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

National Provider Identifier

1891867180

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Jan Stephen Close

Credential M.D.

Sex Male

Practice address 50 Leroy St, Potsdam, NY, 13676

Phone (315) 265-3300

Enumeration date Nov 14, 2006

Last updated in NPPES Jul 10, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 151077 (NY) 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

What is the NPI number for Jan Close?

The National Provider Identifier (NPI) for Jan Close is 1891867180, a Type 1 (individual) record in the CMS NPPES registry.

Where does Jan Close practice?

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

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-10.