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

Individual provider Psychiatry Physician · NPI 1821162041

Dr. William Lowell Siegfried, MD is a Psychiatry Physician in Fresno, California. Practices as a sole proprietor. Licensed in California.

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

5151 N Palm Ave Ste 800
Fresno, CA 93704-2211
Phone: (559) 499-1233
Fax: (559) 499-1232
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Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence G40134 (CA)

Record details

NPI number1821162041
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 20, 2006
Last updated in NPPESJuly 8, 2007
Mailing address5151 N Palm Ave, Suite 800, Fresno, CA 93704-2211

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