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
Mailing address101 Cornelia Ave, Mill Valley, CA 94941-1807