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WILLIAM CLAY GUSTAFSON MD/PHD
NPI 1053502096
Pediatrics - Pediatric Hematology-Oncology in San Francisco, CA

Active since August 06, 2007
505 PARNASSUS AVE # M647, UCSF PEDIATRIC HEMATOLOGY/ONCOLOGY, SAN FRANCISCO, CA 94143(415) 476-3831 Get Directions Write a Review

NPPES record last updated: September 15, 2012. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About William Clay Gustafson Md/phd NPPES

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

WILLIAM CLAY GUSTAFSON MD/PHD (NPI 1053502096) is an individual pediatric hematology-oncology provider in San Francisco, California, licensed in California (A103464) and active in the NPI registry since August 2007.

NPPES Registry Identity

NPI1053502096
Entity TypeIndividualMale
Primary Taxonomy2080P0207X
Provider Legal NameWILLIAM CLAY GUSTAFSONCredential: MD/PHD
Location Address505 PARNASSUS AVE # M647, UCSF PEDIATRIC HEMATOLOGY/ONCOLOGYSan Francisco, CA 94143-2204
Mailing Address505 Parnassus Ave # M647, Ucsf Pediatric Hematology/oncologySan Francisco, CA 94143-2204 · (415) 476-3831
Phone(415) 476-3831
Sole ProprietorYes
Enumeration DateAugust 6, 2007
Last NPPES UpdateSeptember 15, 2012
✔ NPI 1053502096 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
License✔ Licensed in CA · A103464
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
505 PARNASSUS AVE # M647, San Francisco, CA 94143
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Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MRS. FABIENNE HOLLINGER RN, MSN, FNP-C
Nurse Practitioner (Family)
505 PARNASSUS AVE # M647
SAN FRANCISCO, CA 94143
San Francisco County (415) 514-0238
UCSF PEDIATRIC ASSOCIATES
General Acute Care Hospital (Children)
505 PARNASSUS AVE # M647, UCSF BENIOFF CHILDRENS HOSPITAL
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-9628
MARTINA M.V. MOONEY N.P.
Nurse Practitioner (Family)
505 PARNASSUS AVE # M647, UCSF DEPARTMENT OF PEDIATRICS
SAN FRANCISCO, CA 94143
San Francisco County (415) 514-0238

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 Gustafson's NPI number?

The NPI number for William Gustafson is 1053502096. It was assigned to this individual provider in the NPPES registry on August 6, 2007.

Where is William Gustafson located?

William Gustafson practices at 505 Parnassus Ave # M647 Ucsf Pediatric Hematology/Oncology, San Francisco, CA 94143. The listed phone number is (415) 476-3831.

What is William Gustafson'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 Gustafson was last updated on September 15, 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.