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

Individual provider Psychologist · NPI 1538258058

Dr. Fred Barry Krellenstein, PSYD is a Clinical Psychologist in Syosset, New York. Qualified in 1983, 43 years ago. Practices as a sole proprietor, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
43
Licensed in
NY
In the registry since
2006
What do these letters mean?
PSYD — Doctor of Psychology
A doctoral psychologist trained primarily for clinical practice.

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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

Psychologist (primary) Taxonomy 103T00000X · Licence 7790 (NY)

Record details

NPI number1538258058
Entity typeIndividual (Type 1)
GenderMale
Credentials PSYD
Sole proprietorYes
NPI enumeratedOctober 12, 2006
Last updated in NPPESJanuary 10, 2012
Mailing address8 Holly Dr, Syosset, NY 11791-5718

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 1983 (43 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in Syosset