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

Dr. Katherine Williams, MD

Individual provider Internal Medicine Physician · NPI 1710371463

Dr. Katherine Williams, MD is an Internal Medicine in Saint Helena, California. Graduated from University of California, San Francisco School of Medicine in 1984, 42 years ago. Practices as a sole proprietor. Licensed in California.

Years since qualifying
42
Trained at
University of California, San Francisco School of Medicine
Licensed in
CA
In the registry since
2015
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

2800 St Helena Hwy N
Saint Helena, CA 94574
Phone: (707) 758-5936
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G57420 (CA)

Record details

NPI number1710371463
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 20, 2015
Last updated in NPPESMarch 20, 2015
Mailing addressPo Box 82, Saint Helena, CA 94574-0082

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, SAN FRANCISCO SCHOOL OF MEDICINE
Graduated 1984 (42 years in practice)
Accepts Medicare assignment Not indicated
Practice locations2 on file with Medicare

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