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

William C Steffan, MD

Individual provider Family Medicine Physician · NPI 1790758431

William C Steffan, MD is a Family Medicine Physician in Laguna Niguel, 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

27231 La Paz Rd #A
Laguna Niguel, CA 92677
Phone: (949) 643-9111
Fax: (949) 643-8916
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence G42830 (CA)

Record details

NPI number1790758431
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 13, 2006
Last updated in NPPESJune 25, 2018
Mailing address26522 La Alameda, Suite 120, Mission Viejo, CA 92691-6330

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