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DR. KATHARINE FAST M.D.
NPI 1275720484
Allergy & Immunology in San Francisco, CA

Active since October 02, 2007Opted out of Medicare · through Oct 1, 2026
450 SUTTER ST, ALLERGY AND IMMUNOLOGY SUITE 1336, SAN FRANCISCO, CA 94108(415) 433-7800(415) 433-2130 Get Directions Write a Review

NPPES record last updated: January 18, 2012. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Katharine Fast M.d. NPPES

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

DR. KATHARINE FAST M.D. (NPI 1275720484) is an individual allergy & immunology provider in San Francisco, California, licensed in California (A92138) and active in the NPI registry since October 2007. She has opted out of Medicare through October 1, 2026 and remains eligible to order and refer.

NPPES Registry Identity

NPI1275720484
Entity TypeIndividualFemale
Primary Taxonomy207K00000X
Provider Legal NameDR. KATHARINE FASTCredential: M.D.
Location Address450 SUTTER ST, ALLERGY AND IMMUNOLOGY SUITE 1336San Francisco, CA 94108-4206
Mailing Address450 Sutter St, Allergy And Immunology Suite 1336San Francisco, CA 94108-4206 · (415) 433-7800 · Fax (415) 433-2130
Phone(415) 433-7800
Fax(415) 433-2130
Sole ProprietorNo
Enumeration DateOctober 2, 2007
Last NPPES UpdateJanuary 18, 2012
✔ NPI 1275720484 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians
Taxonomy Code207K00000X
License✔ Licensed in CA · A92138
Definition
An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.
Also ListedInternal MedicineTaxonomy 207R00000X · License A92138 (CA)
450 SUTTER ST, San Francisco, CA 94108
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Katharine Fast M.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from October 1, 2022 through October 1, 2026.

Opt-Out Effective DateOctober 1, 2022
Opt-Out In Effect ThroughOctober 1, 2026Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Other Providers at the Same Location NPPES 20

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

J.C. SIMPSON & ASSOC. RPT, INC.
Specialist
450 SUTTER ST, #1003
SAN FRANCISCO, CA 94108
San Francisco County (415) 433-3457
NORMAN H EPSTEIN MD, JOHN H EPSTEIN MD, AND DENNY L TUFFANELLI MD, INC
Dermatology
450 SUTTER ST, SUITE 1306
SAN FRANCISCO, CA 94108
San Francisco County (415) 781-4083
UNION SQUARE DERMATOLOGY A PROFESSIONAL CORPORATION
Dermatology
450 SUTTER ST, SUITE 830
SAN FRANCISCO, CA 94108
San Francisco County (415) 393-0550
DR. MICHAEL HIPOLITO M.D.
Psychiatry & Neurology (Psychiatry)
450 SUTTER ST, SUITE 1728
SAN FRANCISCO, CA 94108
San Francisco County (415) 347-8580
LENORE C. TERR M.D.
Psychiatry & Neurology (Psychiatry)
450 SUTTER ST, SUITE 2534
SAN FRANCISCO, CA 94108
San Francisco County (415) 433-7800
ANTONIA BERCOVICI, PH.D. INC.
Psychologist (Clinical)
450 SUTTER ST, SUITE 2116
SAN FRANCISCO, CA 94108
San Francisco County (415) 395-9299
ADVANCED ORTHOPAEDICS & SPORTS MEDICINE INC
Orthopaedic Surgery
450 SUTTER ST, SUITE 400
SAN FRANCISCO, CA 94108
San Francisco County (415) 900-3000
DR. JAMES C. PIEPERGERDES M.D.
Otolaryngology
450 SUTTER ST, SUITE 933
SAN FRANCISCO, CA 94108
San Francisco County (415) 362-5443

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 Katharine Fast's NPI number?

The NPI number for Katharine Fast is 1275720484. It was assigned to this individual provider in the NPPES registry on October 2, 2007.

Where is Katharine Fast located?

Katharine Fast practices at 450 Sutter St Allergy And Immunology Suite 1336, San Francisco, CA 94108. The listed phone number is (415) 433-7800.

What is Katharine Fast's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Is Katharine Fast enrolled in Medicare?

No. Katharine Fast has opted out of Medicare through October 1, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Katharine Fast was last updated on January 18, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.