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

Dr. Marc I Oster, PSYD

Individual provider Clinical Psychologist · NPI 1114069093

Dr. Marc I Oster, PSYD is a Clinical Psychologist in Deerfield, Illinois. Qualified in 1986, 40 years ago. Practices with Crosswinds Center for Personal and Professional Development, PLLC, a 3-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
40
Licensed in
IL
In the registry since
2007
Specialties on file
3
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

707 Lake Cook Rd Ste 120
Deerfield, IL 60015-4909
Phone: (847) 604-1593
Fax: (847) 579-1055
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X (IL)
Clinical Psychologist Taxonomy 103TC0700X (IL)
Health Service Psychologist Taxonomy 103TH0100X (IL)

Record details

NPI number1114069093
Entity typeIndividual (Type 1)
GenderMale
Credentials PSYD
Sole proprietorYes
NPI enumeratedFebruary 13, 2007
Last updated in NPPESSeptember 11, 2025
Mailing address1954 First St #103, Highland Park, IL 60035-3104

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 1986 (40 years in practice)
Group practice Crosswinds Center For Personal And Professional Development, Pllc — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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