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
Mailing address30 Old Kings Hwy S, Darien, CT 06820-4551