Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Harriet Beth Borofsky, M.D.

Diagnostic Radiology Physician in San Mateo, CA · enumerated 2006.

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

National Provider Identifier

1033162912

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Registry record

Entity type Individual (Type 1)

Name Harriet Beth Borofsky

Credential M.D.

Sex Female

Practice address 100 S San Mateo Dr, San Mateo, CA, 94401

Phone (650) 696-4140

Enumeration date May 19, 2006

Last updated in NPPES Jul 22, 2019

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License G689150 (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
00G689150	Medicaid	CA	-
300121862	Other	CA	RAILROAD MEDICARE

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 is the NPI number for Harriet Borofsky?

The National Provider Identifier (NPI) for Harriet Borofsky is 1033162912, a Type 1 (individual) record in the CMS NPPES registry.

Where does Harriet Borofsky practice?

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

Other providers at this practice address

Browse all →

Jeffrey J. Guttas. MD, Inc. Allergy & Immunology Physician · San Mateo, CA NPI 1073517009 Umesh Gheewala Internal Medicine Physician · San Mateo, CA NPI 1982608568 Frederick Adler Family Medicine Physician · San Mateo, CA NPI 1629030515 Kelly Broderick Diagnostic Radiology Physician · San Mateo, CA NPI 1609821891 Dennis Stempler Emergency Medicine Physician · San Mateo, CA NPI 1518907583 Clay Napper Diagnostic Radiology Physician · San Mateo, CA NPI 1053352815 Mills-Peninsula Health Services Rehabilitation Hospital · San Mateo, CA NPI 1770527251 Mills-Peninsula Health Services End-Stage Renal Disease (ESRD) Treatment Clinic/Center · San Mateo, CA NPI 1851335335

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-07-22.