Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Marion J N Darling, MD

Family Medicine Physician in Lake Oswego, OR · enumerated 2005.

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

National Provider Identifier

1558366989

Verified

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Registry record

Entity type Individual (Type 1)

Name Dr. Marion J N Darling

Credential MD

Sex Female

Practice address Lake Oswego, OR, 97035

Phone (503) 635-0200

Fax (503) 635-0890

Enumeration date Jun 13, 2005

Last updated in NPPES May 21, 2008

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License MD 20446 (OR) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
MD 20446	Other	OR	LICENSE

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.

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Frequently asked questions

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.

What specialty is Marion Darling?

Marion Darling is registered in NPPES with the primary taxonomy of Family Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Stacy Geisler Oral and Maxillofacial Surgery (Dentist) · Lake Oswego, OR NPI 1538267364 Marion J Darling Mdpc Primary Care Clinic/Center · Lake Oswego, OR NPI 1255502928 Colin Smith General Practice Dentistry · Lake Oswego, OR NPI 1639346778 Lake Oswego Smiles General Practice Dentistry · Lake Oswego, OR NPI 1952577058 Hearing Rehab Center Audiologist · Lake Oswego, OR NPI 1114267101 David Luther Audiologist · Lake Oswego, OR NPI 1316373210

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-21.