NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marnie Walsh, PA-C

Medical Physician Assistant in Thornton, CO · enumerated 2008.

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

National Provider Identifier

1225280837

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Marnie Walsh
Credential PA-C
Sex Female
Practice address 9197 Grant St, Suite 200, Thornton, CO, 80229
Phone (303) 450-3690
Fax (303) 962-1511
Enumeration date Oct 14, 2008
Last updated in NPPES Mar 7, 2016

Taxonomy & licenses

363AM0700X Medical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 1804 (CO) Primary

Other identifiers

Identifier Type State Issuer
1058548 Other CO NCCPA

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 Marnie Walsh practice?
The practice location on file with NPPES is in Thornton, CO. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Marnie Walsh?
The National Provider Identifier (NPI) for Marnie Walsh is 1225280837, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-03-07.