Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Catherine Marie Sommer, RN, CPNP

Pediatric Nurse Practitioner in Denver, CO · enumerated 2007.

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

National Provider Identifier

1902933096

Verified

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Registry record

Entity type Individual (Type 1)

Name Catherine Marie Sommer

Credential RN, CPNP

Sex Female

Practice address 4159 Lowell Blvd, Denver, CO, 80211

Phone (303) 458-7220

Fax (303) 477-7559

Enumeration date Feb 27, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 54011 (CO) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

Other identifiers

Identifier	Type	State	Issuer
1473327	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 Catherine Sommer?

The National Provider Identifier (NPI) for Catherine Sommer is 1902933096, a Type 1 (individual) record in the CMS NPPES registry.

Where does Catherine Sommer practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.