Gregory S. Chasson, PH.D.
Clinical Psychologist · Oak Park, IL
Gregory S. Chasson, PH.D. is a clinical psychologist with a practice address in Oak Park, Illinois, and NPI 1629239629, issued on Jun 23, 2008. Check the license with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gregory S. Chasson
- Credential
- PH.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- 04754 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1010 Lake St Ste 428, Oak Park, IL 60301
- Phone
- (312) 386-7511
- Enumerated
- Jun 23, 2008
- Record last updated
- Aug 8, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (844) 633-7262
- Medicare enrollment
- Enrolled (PECOS I20221108002058); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 3,947 in Illinois → Look up another NPI →
Verify Gregory S. Chasson 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
The MIPS final score for 2023 (Medicare payment program): 97.7 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
One hospital affiliation
- The University OF Chicago Medical CenterChicago, IL · Acute Care Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Gregory S. Chasson among 3,947 clinical psychologist records in Illinois
Gregory S. Chasson, PH.D. is one of 3,947 clinical psychologist records with a practice address in Illinois. 16% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 43% of them.
- NPI issued2008 · 43% of these records are older, 53% newer
- In a Medicare fileYes · 16% of these records are
- In the CMS Doctors and Clinicians fileYes · 27% of these records are
- Graduated2008 · median 2004 among the 1,081 with a school on file
- Record last updated2016 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
83 clinical psychologist records list a practice address in Oak Park
They are 83 of the 2,307 NPPES records with a practice address in Oak Park, and 3,947 clinical psychologist records in Illinois.
All 3,947 in Illinois → Every provider in Oak Park → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Garth Amundson, PSY.D.Oak Park, IL 603011629133996
- Braden Berkey, PSY.D.Oak Park, IL 603011215900907
- Constance Bernt, PSY.D.Oak Park, IL 603011316965486
- Charles Davis, PH.D.Oak Park, IL 603011881704047
- Camille Ference, PHDOak Park, IL 603011952475782
- Cindy Gilmore, PSYDOak Park, IL 603011033172549
- Patricia Huth, PH.D.Oak Park, IL 603011134139835
- Laura Lerner, PHDOak Park, IL 603011386747756
Common questions
What is Gregory S. Chasson, PH.D.'s NPI number?
Gregory S. Chasson, PH.D.'s National Provider Identifier (NPI) is 1629239629, issued on Jun 23, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Gregory S. Chasson, PH.D. located?
The NPPES record lists a practice address at 1010 Lake St Ste 428, Oak Park, IL, 60301. Phone: (312) 386-7511. Providers update this record themselves, so call before visiting.
How can I verify Gregory S. Chasson, PH.D.'s license?
Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
What is Gregory S. Chasson, PH.D.'s MIPS final score?
The 2023 MIPS final score is 97.7 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.