Marc I. Oster, PSY.D.
Psychologist · Deerfield, IL
Marc I. Oster, PSY.D. is a psychologist with a practice address in Deerfield, Illinois, and NPI 1114069093, issued on Feb 13, 2007. Check the license with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marc I. Oster
- Credential
- PSY.D.
- Primary taxonomy
- Psychologist 103T00000X
- Practice location
- 707 Lake Cook RD Ste 120, Deerfield, IL 60015
- Phone
- (847) 604-1593
- Enumerated
- Feb 13, 2007
- Record last updated
- Sep 11, 2025
- Fax
- (847) 579-1055
- Medicare enrollment
- Enrolled (PECOS I20090319000499); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest psychologist records → All 1,011 in Illinois → Look up another NPI →
Also registered at 707 Lake Cook RD Ste 120
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Viviene Francisco, PTPhysical Therapist1841422730
- Mannu Joseph, PTPhysical Therapist1649927963
- James Thirunelliparambil, DPTPhysical Therapist1265931273
Verify Marc I. Oster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Crosswinds Center For Personal And Professional Development, PLLCArlington Heights, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marc I. Oster among 1,011 psychologist records in Illinois
Marc I. Oster, PSY.D. is one of 1,011 psychologist records with a practice address in Illinois. 11% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 25% of them.
- NPI issued2007 · 25% of these records are older, 62% newer
- In a Medicare fileYes · 11% of these records are
- In the CMS Doctors and Clinicians fileYes · 20% of these records are
- Graduated1986 · median 2001 among the 201 with a school on file
- Record last updated2025 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103T00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
12 psychologist records list a practice address in Deerfield
They are 12 of the 712 NPPES records with a practice address in Deerfield, and 1,011 psychologist records in Illinois.
All 1,011 in Illinois → Every provider in Deerfield → Psychologist nationwide →
The 8 psychologist records with the nearest ZIP codes
- Hannah Carl, PSYDDeerfield, IL 600151730816224
- Susan Gault, PSYDDeerfield, IL 600151427125855
- Kristina HuberDeerfield, IL 600151891532966
- Steven Julius, PHDBannockburn, IL 600151154451870
- Melissa Kay, PSY.D.Deerfield, IL 600151639336183
- Cynthia Kent, PSYD, BCIA-EEGDeerfield, IL 600151275865743
- Amy Kingan, PSYDDeerfield, IL 600151780433284
- Carol Oster, PSY.D.Deerfield, IL 600151134362650
Common questions
What is Marc I. Oster, PSY.D.'s NPI number?
Marc I. Oster, PSY.D.'s National Provider Identifier (NPI) is 1114069093, issued on Feb 13, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Marc I. Oster, PSY.D. located?
The NPPES record lists a practice address at 707 Lake Cook RD Ste 120, Deerfield, IL, 60015. Phone: (847) 604-1593. Providers update this record themselves, so call before visiting.
How can I verify Marc I. Oster, PSY.D.'s license?
Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.