Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Catherine Calahan, CRNP

Family Nurse Practitioner in Westminster, CO · enumerated 2016.

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

National Provider Identifier

1558715045

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Registry record

Entity type Individual (Type 1)

Name Catherine Calahan

Credential CRNP

Sex Female

Practice address 6080 W 92nd Ave Ste 1000, Westminster, CO, 80031

Phone (952) 270-2404

Enumeration date Apr 20, 2016

Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 640908 (PA) Secondary

163W00000X Registered Nurse Nursing Service Providers · License RN95091830 (CA) Secondary

163W00000X Registered Nurse Nursing Service Providers · License RN.0200856 (CO) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License F0516404 (PA) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 002234 (NV) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 95004653 (CA) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 0993174-NP (CO) 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 Catherine Calahan practice?

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

What is the NPI number for Catherine Calahan?

The National Provider Identifier (NPI) for Catherine Calahan is 1558715045, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.