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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.

KARL ANTHONY SPORER MD
NPI 1235170978
Internal Medicine in San Francisco, CA

Active since June 10, 2006
1001 POTRERO AVENUE, RM 1E21, SAN FRANCISCO, CA 94110(415) 206-5753(415) 206-5818 Get Directions Write a Review

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

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

About Karl Anthony Sporer Md NPPES

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

KARL ANTHONY SPORER MD (NPI 1235170978) is an individual internal medicine provider in San Francisco, California, licensed in California (C42975) and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1235170978
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameKARL ANTHONY SPORERCredential: MD
Location Address1001 POTRERO AVENUE, RM 1E21San Francisco, CA 94110-3518
Mailing AddressPo Box 7464San Francisco, CA 94120-7464 · (415) 206-3103 · Fax (415) 206-3872
Phone(415) 206-5753
Fax(415) 206-5818
Sole ProprietorNo
Enumeration DateJune 10, 2006
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1235170978 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · C42975
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedEmergency MedicineTaxonomy 207P00000X · License C42975 (CA)
1001 POTRERO AVENUE, San Francisco, CA 94110
Open in Google Maps ↗

Other Identifiers 2

Other93D013020CA · Railroad Medicare
Medicaid00C429750CA

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.

PWINT PHYU KHINE D.O.
Radiology (Diagnostic Radiology)
1001 POTRERO AVENUE, BLDG. 5, 1ST FLOOR
SAN FRANCISCO, CA 94110
San Francisco County (628) 206-8020
JOYCE SESE DORADO PH D
Psychologist (Clinical)
1001 POTRERO AVENUE, RM 7M
SAN FRANCISCO, CA 94110
San Francisco County (415) 206-5612
STEPHANIE SHEREENA HERNANDEZ
Community Health Worker
1001 POTRERO AVENUE, BUILDING 90 WARD 94
SAN FRANCISCO, CA 94110
San Francisco County (415) 373-7119
CITY AND COUNY OF SAN FRANCISCO
Nuclear Medicine
1001 POTRERO AVENUE, RM G100
SAN FRANCISCO, CA 94110
San Francisco County (415) 206-8580
URMIMALA SARKAR MD
Internal Medicine
1001 POTRERO AVENUE, RM 5H22
SAN FRANCISCO, CA 94110
San Francisco County (415) 206-8317
RENA MEI MD
Internal Medicine (Gastroenterology)
1001 POTRERO AVENUE, BUILDING 5, 3RD FLOOR, SUITE 3D
SAN FRANCISCO, CA 94110
San Francisco County (628) 206-8823
MICHAEL HARRINGTON HUMPHREYS MD
Internal Medicine
1001 POTRERO AVENUE, BLDG 100 RM 350
SAN FRANCISCO, CA 94110
San Francisco County (415) 476-4617
LLOYD JOSEPH KING MD
Psychiatry & Neurology (Psychiatry)
1001 POTRERO AVENUE, RM 7M
SAN FRANCISCO, CA 94110
San Francisco County (415) 206-5612

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 Karl Sporer's NPI number?

The NPI number for Karl Sporer is 1235170978. It was assigned to this individual provider in the NPPES registry on June 10, 2006.

Where is Karl Sporer located?

Karl Sporer practices at 1001 Potrero Avenue Rm 1e21, San Francisco, CA 94110. The listed phone number is (415) 206-5753.

What is Karl Sporer's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Karl Sporer 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.