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Edit this profileOscar A. Gerdner, MD practices child & adolescent psychiatry in Darien, CT. The provider's National Provider Identifier (NPI) is 1801209952.
Factual summary compiled by Guide.md from public records; not written by this provider.
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
30 OLD KINGS HWY S
Darien, CT 06820
Massachusetts General Hospital 55 Fruit St.
Boston, MA 02114
Dr. Gerdner is a child & adolescent psychiatry in Darien, CT. That is the designation recorded for this NPI in the federal registry.
NPI registry
Dr. Gerdner is listed at 30 Old Kings Hwy S, Darien, CT 06820. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
The number on file is (203) 349-8037. Contact the office directly to confirm availability and scheduling.
NPI registry
Dr. Gerdner's National Provider Identifier is 1801209952. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Dr. Gerdner has 12+ years experience. Registered with an NPI since 2014. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Gerdner. If this is you, claiming it is free.
Guide.md
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