Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mark J Kasselik, MD

Individual provider Nephrology Physician · NPI 1891860193

Mark J Kasselik, MD is a Nephrology Physician in San Francisco, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2100 Webster St Ste 405
San Francisco, CA 94115
Phone: (415) 923-3456
Fax: (415) 923-3121
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence G62355 (CA)

Record details

NPI number1891860193
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 21, 2006
Last updated in NPPESJuly 18, 2013

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