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MARK J KASSELIK MD
NPI 1891860193
Internal Medicine - Nephrology in San Francisco, CA

Active since November 21, 2006
2100 WEBSTER STREET, STE 405, SAN FRANCISCO, CA 94115(415) 923-3456(415) 923-3121 Get Directions Write a Review

NPPES record last updated: July 18, 2013. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Mark J Kasselik Md NPPES

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

MARK J KASSELIK MD (NPI 1891860193) is an individual nephrology provider in San Francisco, California, licensed in California (G62355) and active in the NPI registry since November 2006.

NPPES Registry Identity

NPI1891860193
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameMARK J KASSELIKCredential: MD
Location Address2100 WEBSTER STREET, STE 405San Francisco, CA 94115
Mailing Address2100 Webster Street, Ste 405San Francisco, CA 94115 · (415) 923-3456 · Fax (415) 923-3121
Phone(415) 923-3456
Fax(415) 923-3121
Sole ProprietorNo
Enumeration DateNovember 21, 2006
Last NPPES UpdateJuly 18, 2013
✔ NPI 1891860193 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in CA · G62355
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
2100 WEBSTER STREET, San Francisco, CA 94115
Open in Google Maps ↗

Other Identifiers 3

Medicaid00G623551CA
Medicare UPINF14508CA
Medicare PIN00G623554CA

Other Providers at the Same Location NPPES 12

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

DR. LESLEY J ANDERSON MD
Orthopaedic Surgery
2100 WEBSTER STREET, SUITE 309
SAN FRANCISCO, CA 94115
San Francisco County (415) 923-3029
MS. COURTNEY MCSPADDEN NP
Nurse Practitioner (Family)
2100 WEBSTER STREET, SUITE 506
SAN FRANCISCO, CA 94115
San Francisco County (415) 923-3067
ALAN B NEWMAN MD
Internal Medicine (Medical Oncology)
2100 WEBSTER STREET, SUITE 326
SAN FRANCISCO, CA 94115
San Francisco County (415) 885-8600
DR. ALAN M KRAMER MD
Internal Medicine (Medical Oncology)
2100 WEBSTER STREET, #326
SAN FRANCISCO, CA 94115
San Francisco County (415) 885-8600
DR. ERIN A HSU M.D.
Internal Medicine (Infectious Disease)
2100 WEBSTER STREET, SUITE 400
SAN FRANCISCO, CA 94115
San Francisco County (415) 923-3883
LOREN BETH ESKENAZI MD
Surgery (Plastic and Reconstructive Surgery)
2100 WEBSTER STREET, SUITE 506
SAN FRANCISCO, CA 94115
San Francisco County (415) 923-3067
CAROLYN CHIENG LIN CHANG MD
Surgery (Plastic and Reconstructive Surgery)
2100 WEBSTER STREET, SUITE 506
SAN FRANCISCO, CA 94115
San Francisco County (415) 923-3067
DR. QUITA V CRUCIGER M.D.
Dermatology
2100 WEBSTER STREET, SUITE 428
SAN FRANCISCO, CA 94115
San Francisco County (415) 923-3115

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 Mark Kasselik's NPI number?

The NPI number for Mark Kasselik is 1891860193. It was assigned to this individual provider in the NPPES registry on November 21, 2006.

Where is Mark Kasselik located?

Mark Kasselik practices at 2100 Webster Street Ste 405, San Francisco, CA 94115. The listed phone number is (415) 923-3456.

What is Mark Kasselik's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

When was this NPI record last updated?

The NPPES record for Mark Kasselik was last updated on July 18, 2013. 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.