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.

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Practice location Address checks out

151 Milbank Ave
Greenwich, CT 06830-6616
Phone: (203) 622-0337
Fax: (203) 622-1726
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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
Mailing address151 Milbank Ave, Greenwich, CT 06830-6616

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