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

Dr. William Mark Olcott, MD

Individual provider Child & Adolescent Psychiatry Physician · NPI 1164725206

Dr. William Mark Olcott, MD is a Child & Adolescent Psychiatry Physician in New York, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2010
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

815 Park Ave 1B
New York, NY 10021-3295
Phone: (212) 794-0952
Fax: (212) 639-1439
Show map & directions

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

Specialties & licences

Child & Adolescent Psychiatry Physician (primary) Taxonomy 2084P0804X · Licence 215371 (NY)

Record details

NPI number1164725206
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedDecember 12, 2010
Last updated in NPPESDecember 12, 2010

Other providers in New York