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

Dr. William Harrison Koch, MD

Individual provider Child & Adolescent Psychiatry Physician · NPI 1083884753

Dr. William Harrison Koch, MD is a Child & Adolescent Psychiatry Physician in Greenwich, Connecticut. Practices as a sole proprietor. Licensed in Connecticut.

Licensed in
CT
In the registry since
2008
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

151 Milbank Ave
Greenwich, CT 06830-6616
Phone: (203) 622-0337
Fax: (203) 622-1726
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 025221 (CT)

Record details

NPI number1083884753
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 9, 2008
Last updated in NPPESMarch 9, 2008

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