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

Oscar A Gerdner, MD

Individual provider Child & Adolescent Psychiatry Physician · NPI 1801209952

Oscar A Gerdner, MD is a Child & Adolescent Psychiatry Physician in Darien, Connecticut. Works from 2 locations. Licensed in Connecticut.

Licensed in
CT
In the registry since
2014
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

30 Old Kings Hwy S
Darien, CT 06820-4551
Phone: (203) 349-8037
Fax: (888) 751-6612
Show map & directions

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

Additional practice locations (1)

  • Massachusetts General Hospital, Boston, MA 02114 — (617) 724-5600

Specialties & licences

Child & Adolescent Psychiatry Physician (primary) Taxonomy 2084P0804X · Licence 60001 (CT)

Record details

NPI number1801209952
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 6, 2014
Last updated in NPPESMay 31, 2023
Certification dateMay 31, 2023