1. Home
  2. Directory
  3. California
  4. San Francisco
  5. Pediatrics
  6. NPI Profile

DR. WILLIAM C. MENTZER M.D.
NPI 1255430146
Pediatrics - Pediatric Hematology-Oncology in San Francisco, CA

Active since September 21, 2006
505 PARNASSUS AVE # M649, SAN FRANCISCO, CA 94143(415) 476-1280(415) 502-4372 Get Directions Write a Review

NPPES record last updated: August 24, 2012. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. William C. Mentzer M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM C. MENTZER M.D. (NPI 1255430146) is an individual pediatric hematology-oncology provider in San Francisco, California, licensed in California (G11921) and active in the NPI registry since September 2006.

NPPES Registry Identity

NPI1255430146
Entity TypeIndividualMale
Primary Taxonomy2080P0207X
Provider Legal NameDR. WILLIAM C. MENTZERCredential: M.D.
Location Address505 PARNASSUS AVE # M649San Francisco, CA 94143-2204
Mailing Address1635 Divisadero St, Suite 625, Box 1821San Francisco, CA 94143-0001 · (415) 476-4029 · Fax (415) 476-4150
Phone(415) 476-1280
Fax(415) 502-4372
Sole ProprietorNo
Enumeration DateSeptember 21, 2006
Last NPPES UpdateAugust 24, 2012
✔ NPI 1255430146 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
License✔ Licensed in CA · G11921
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
Also ListedPediatricsTaxonomy 208000000X · License G11921 (CA)
505 PARNASSUS AVE # M649, San Francisco, CA 94143
Open in Google Maps ↗

Other Identifiers 3

Medicare UPINF06407CA
Medicaid00G119210CA
Medicare PIN00G119210CA

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Mentzer's NPI number?

The NPI number for William Mentzer is 1255430146. It was assigned to this individual provider in the NPPES registry on September 21, 2006.

Where is William Mentzer located?

William Mentzer practices at 505 Parnassus Ave # M649, San Francisco, CA 94143. The listed phone number is (415) 476-1280.

What is William Mentzer's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.

When was this NPI record last updated?

The NPPES record for William Mentzer was last updated on August 24, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.