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

Dr. William Zachary Barnard, MD

Individual provider Psychiatry Physician · NPI 1194016345

Dr. William Zachary Barnard, MD is a Psychiatry Physician in Sudbury, Massachusetts. Practices as a sole proprietor. Licensed in Massachusetts.

Licensed in
MA
In the registry since
2011
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

322 Boston Post Rd # 208
Sudbury, MA 01776-3007
Phone: (508) 504-7961
Fax: (513) 880-0896
Show map & directions

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

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 248950 (MA)

Record details

NPI number1194016345
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 22, 2011
Last updated in NPPESJuly 6, 2021
Certification dateJuly 6, 2021

Other providers in Sudbury