Gregory Chasson, PH.D.
NPI 1629239629 · Clinical Psychologist · Oak Park, IL
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Chasson, PH.D. is a Clinical Psychologist provider in Oak Park, IL (NPI 1629239629).
Provider details
- NPI number
- 1629239629
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 04754 (MD)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-06-23
- Last updated
- 2016-08-08
Frequently asked questions
- What is Gregory Chasson's NPI number?
- Gregory Chasson's National Provider Identifier (NPI) is 1629239629, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Chasson's specialty?
- Gregory Chasson is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Gregory Chasson located?
- Gregory Chasson's practice location on file with NPPES is 1010 Lake St Ste 428, Oak Park, IL 60301-1185.
- What is Gregory Chasson's phone number?
- The practice phone number listed in the NPPES registry for Gregory Chasson is (312) 386-7511.
- Does Gregory Chasson accept Medicare?
- Gregory Chasson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Chasson's NPI active?
- Yes — Gregory Chasson's NPI (1629239629) is active in the NPPES registry as of the last update on 2016-08-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.