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

Dr. William J Hennessy, MD

Individual provider Dermatology Physician · NPI 1619184157

Dr. William J Hennessy, MD is a Dermatology Physician in San Jose, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

276 International Cir
San Jose, CA 95119-1197
Phone: (408) 363-4525
Show map & directions

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

Specialties & licences

Dermatology Physician (primary) Taxonomy 207N00000X · Licence C25212 (CA)

Record details

NPI number1619184157
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 16, 2007
Last updated in NPPESJuly 8, 2007

Other providers in San Jose