Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Andrew W. Bollen, MD

Neuropathology Physician in San Francisco, CA · enumerated 2006.

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

National Provider Identifier

1629036470

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Registry record

Entity type Individual (Type 1)

Name Dr. Andrew W. Bollen

Credential MD

Sex Male

Practice address 513 Parnassus Ave, San Francisco, CA, 94143

Phone (415) 476-5236

Fax (415) 476-7963

Enumeration date May 2, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

207ZN0500X Neuropathology Physician Allopathic & Osteopathic Physicians · License G59408 (CA) Primary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License G59408 (CA) Secondary

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
0G5940800	Medicaid	CA	-

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 Andrew Bollen?

Andrew Bollen is registered in NPPES with the primary taxonomy of Neuropathology Physician. 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.