Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Isabel H Koelsch MD

Q: What is the NPI number for Isabel H Koelsch MD?

The NPI for Isabel H Koelsch MD is 1134299282, a Type 2 (organization) record in the CMS NPPES registry.

Dermatology Physician in Longmont, CO · enumerated 2006 · authorized official Isabel Koelsch, Owner.

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

National Provider Identifier

1134299282

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Registry record

Entity type Organization (Type 2)

Legal business name Isabel H Koelsch MD

Practice address 1850 W Mountain View Ave, Longmont, CO, 80501

Phone (303) 776-1500

Fax (303) 772-2995

Enumeration date Nov 8, 2006

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 23406 (CO) Primary

Authorized official

Name Isabel Koelsch

Title Owner

Phone (303) 776-1500

Other identifiers

Identifier	Type	State	Issuer
01234061	Medicaid	CO	-

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 Isabel H Koelsch MD?

The NPI for Isabel H Koelsch MD is 1134299282, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Isabel H Koelsch MD?

NPPES lists Isabel Koelsch (Owner) as the authorized official for this organization.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.