Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alexandra Bronwen Nelson, MD, PHD

Neurology Physician in San Francisco, CA · enumerated 2008.

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

National Provider Identifier

1346417953

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Registry record

Entity type Individual (Type 1)

Name Dr. Alexandra Bronwen Nelson

Credential MD, PHD

Sex Female

Practice address Ucsf Neurology Dept 505 Parnassus Ave, M798 Box 0114, San Francisco, CA, 94143

Phone (415) 476-1487

Enumeration date May 13, 2008

Last updated in NPPES May 13, 2008

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License A103722 (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
A103722	Other	CA	CA 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.

Read the full guide → Validate an NPI →

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 Alexandra Nelson?

Alexandra Nelson is registered in NPPES with the primary taxonomy of Neurology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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