Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alexandra Dos Santos Zimmer, M.D.

Medical Oncology Physician in Portland, OR · enumerated 2009.

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

National Provider Identifier

1548496573

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Registry record

Entity type Individual (Type 1)

Name Dr. Alexandra Dos Santos Zimmer

Credential M.D.

Sex Female

Practice address 3191 Sw Sam Jackson Park Road,, Mail Code: Oc14ho, Portland, OR, 97239

Phone (503) 494-9160

Enumeration date Jun 4, 2009

Last updated in NPPES Aug 18, 2022

Taxonomy & licenses

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License MD211105 (OR) Primary

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

Where does Alexandra Zimmer practice?

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

What is the NPI number for Alexandra Zimmer?

The National Provider Identifier (NPI) for Alexandra Zimmer is 1548496573, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-18.