NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marilyn A Dunning, FNP

Nurse Practitioner in Lake Oswego, OR · enumerated 2022 · practices at Optum Behavioral Care of Colorado, P.C..

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

National Provider Identifier

1518609122

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Marilyn A Dunning
Credential FNP
Sex Female
Practice address 4550 Kruse Way Ste 125, Lake Oswego, OR, 97035
Phone (503) 864-5190
Fax (844) 897-5321
Enumeration date Apr 13, 2022
Last updated in NPPES May 4, 2026

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 10014871 (OR) Primary
FNP · Family Nurse Practitioner: A nurse practitioner certified in family practice across the lifespan. About the FNP credential

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 specialty is Marilyn Dunning?
Marilyn Dunning is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-05-04.