Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Catherine Monhollen, APRN

Family Nurse Practitioner in Casper, WY · enumerated 2006.

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

National Provider Identifier

1841306537

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Registry record

Entity type Individual (Type 1)

Name Catherine Monhollen

Credential APRN

Sex Female

Practice address 770 E 2nd St, Casper, WY, 82601

Phone (307) 237-5510

Fax (307) 237-0607

Enumeration date Aug 22, 2006

Last updated in NPPES May 13, 2014

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 29952.1135 (WY) Primary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License SP008447 (PA) Secondary

APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN credential

Other identifiers

Identifier	Type	State	Issuer
132716000	Medicaid	WY	-

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 Monhollen practice?

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

What is the NPI number for Catherine Monhollen?

The National Provider Identifier (NPI) for Catherine Monhollen is 1841306537, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-05-13.