Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Isaac J Klostermann, PA-C

Physician Assistant in Montrose, CO · enumerated 2012.

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

National Provider Identifier

1386996080

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Registry record

Entity type Individual (Type 1)

Name Isaac J Klostermann

Credential PA-C

Sex Male

Practice address 1010 S Rio Grande Ave, Montrose, CO, 81401

Phone (970) 497-3333

Fax (855) 299-7837

Enumeration date Oct 5, 2012

Last updated in NPPES Apr 20, 2026

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA.0003531 (CO) Primary

Other identifiers

Identifier	Type	State	Issuer
63020254	Medicaid	CO	-
497750ZPR5	Other	CO	MEDICARE B PTAN FOR PEAK FAMILY MEDICINE
P01653177	Other	CO	RAILROAD WORKERS MEDICARE FOR PEAK FAMILY MEDICINE

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

What specialty is Isaac Klostermann?

Isaac Klostermann is registered in NPPES with the primary taxonomy of Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-20.