Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dagmara Olsen, MD

Internal Medicine Physician in Pico Rivera, CA · enumerated 2021.

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

National Provider Identifier

1356912059

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Registry record

Entity type Individual (Type 1)

Name Dagmara Olsen

Credential MD

Sex Female

Practice address 8337 Telegraph Rd Ste 102, Pico Rivera, CA, 90660

Phone (562) 445-3181

Enumeration date Jul 5, 2021

Last updated in NPPES Jul 15, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License T-4368 (MS) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 193842 (CA) 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
T-4368	Other	MS	MEDICAL LICENSE
T-4368	Other	MS	MEDICAL BOARD OF MS

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 Dagmara Olsen?

Dagmara Olsen is registered in NPPES with the primary taxonomy of Internal 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 →

Ronald E. Pinkerton, M.D. A Medical Corporation Family Medicine Physician · Pico Rivera, CA NPI 1366915175 Prohealth Partners, A Medical Group, Inc. Internal Medicine Physician · Pico Rivera, CA NPI 1912899394

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-15.