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

Mr. Mark Lewis Illeman, FNP

Individual provider Family Nurse Practitioner · NPI 1548388861

Mr. Mark Lewis Illeman, FNP is a Family Nurse Practitioner in San Francisco, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
What do these letters mean?
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.

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Practice location Address checks out

2300 California St Ste 306
San Francisco, CA 94115-2753
Phone: (415) 202-1550
Fax: (415) 776-8233
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 2005 (CA)

Record details

NPI number1548388861
Entity typeIndividual (Type 1)
GenderMale
Credentials FNP
Sole proprietorNo
NPI enumeratedMarch 26, 2007
Last updated in NPPESJune 19, 2015

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