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

Dr Fred Krellenstein, Psychologist, PC

Organization Clinical Psychologist · NPI 1215293709

Dr Fred Krellenstein, Psychologist, PC is a Clinical Psychologist in Syosset, New York. Registered with an NPI since 2012.

In the registry since
2012
What do these letters mean?
PC — Professional corporation
A form of business registration, not a clinical qualification.

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Practice location Address checks out

8 Holly Dr
Syosset, NY 11791-5718
Phone: (516) 921-3943
Fax: (516) 682-8210
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X

Record details

NPI number1215293709
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Fred Krellenstein — President · (516) 921-3943
NPI enumeratedApril 9, 2012
Last updated in NPPESJuly 17, 2013
Mailing address8 Holly Dr, Syosset, NY 11791-5718

Other providers in Syosset