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

Dr. Eric John Dieffenbach, MD

Individual provider Psychiatry Physician · NPI 1497082614

Dr. Eric John Dieffenbach, MD is a Psychiatry Physician in New Canaan, Connecticut. Practices as a sole proprietor. Licensed in Connecticut.

Licensed in
CT
In the registry since
2009
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

72 Park St
New Canaan, CT 06840-4532
Phone: (203) 858-1275
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 032401 (CT)

Record details

NPI number1497082614
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 9, 2009
Last updated in NPPESNovember 9, 2009
Mailing address72 Park St, New Canaan, CT 06840-4532

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