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

Dr. William Lang, MD

Individual provider Research Study Specialist · NPI 1326445065

Dr. William Lang, MD is a Research Study Specialist in Mill Valley, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2014
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

101 Cornelia Ave
Mill Valley, CA 94941-1807
Phone: (415) 755-8841
Show map & directions

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

Specialties & licences

Research Study Specialist (primary) Taxonomy 1744R1102X · Licence G037379 (CA)

Record details

NPI number1326445065
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 24, 2014
Last updated in NPPESNovember 24, 2014