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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. C. SPENCER YOST MD
NPI 1356309140
Anesthesiology in San Francisco, CA

Active since May 02, 2006PECOS Enrolled
513 PARNASSUS AVE, SAN FRANCISCO, CA 94143(415) 476-9035 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. C. Spencer Yost Md NPPES

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

DR. C. SPENCER YOST MD (NPI 1356309140) is an individual anesthesiology provider in San Francisco, California, licensed in California (G53750) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1356309140
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. C. SPENCER YOSTCredential: MD
Location Address513 PARNASSUS AVESan Francisco, CA 94143-2205
Mailing Address1635 Divisadero Street, Suite 625, Box 1821San Francisco, CA 94143-0001 · (415) 476-4029 · Fax (415) 476-4150
Phone(415) 476-9035
Sole ProprietorNo
Enumeration DateMay 2, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1356309140 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · G53750
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
Also ListedAnesthesiology · Critical Care MedicineTaxonomy 207LC0200X · License G53750 (CA)
513 PARNASSUS AVE, San Francisco, CA 94143
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Other Identifiers 1

Medicaid0G5375000CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. C. Spencer Yost Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer– Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

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.

DR. ELLIOTT SCOTT SEELEY M.D., PH.D.
Pathology (Molecular Genetic Pathology)
513 PARNASSUS AVE, HSW4, SUITE 450A
SAN FRANCISCO, CA 94143
San Francisco County (415) 514-0738
DR. LAURA WONG M.D./PH.D.
Plastic Surgery
513 PARNASSUS AVE, S-321
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-1239
ALAN ZAMBELI-LJEPOVIC
Surgery
513 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-1239
UCSF MEDICAL CENTER
General Acute Care Hospital
513 PARNASSUS AVE, BOX 0427
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-3235
WILLIAM MCKLEROY M.D
Internal Medicine (Pulmonary Disease)
513 PARNASSUS AVE, HSE1314
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-0735
MS. MELICENT CLARE PECK M.D., PHD
Internal Medicine (Infectious Disease)
513 PARNASSUS AVE, S-380, BOX 0654
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-9362
DR. SCOTT R. VANDENBERG MD
Pathology (Neuropathology)
513 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 502-7796
DR. CHEIKH NJIE MD
Internal Medicine (Gastroenterology)
513 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 502-4444

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 C. Spencer Yost's NPI number?

The NPI number for C. Spencer Yost is 1356309140. It was assigned to this individual provider in the NPPES registry on May 2, 2006.

Where is C. Spencer Yost located?

C. Spencer Yost practices at 513 Parnassus Ave, San Francisco, CA 94143. The listed phone number is (415) 476-9035.

What is C. Spencer Yost's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is C. Spencer Yost enrolled in Medicare?

Yes. C. Spencer Yost is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for C. Spencer Yost was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 days 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.