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Gregory Davis, PH.D.
NPI 1225157217 · Clinical Psychologist · Chicago, IL
Gregory Davis, PH.D. is a Clinical Psychologist provider in Chicago, IL (NPI 1225157217).
Provider details
- NPI number
- 1225157217
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(83/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
83% 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
1901 W Harrison St
Chicago, IL 60612-3714
Phone: (312) 864-6000
Street-level locationGet directions
Mailing address
2933 N Sheridan Rd
Chicago, IL 60657-5965
Registry dates
- Enumerated
- 2007-03-28
- Last updated
- 2007-07-08
Frequently asked questions
- What is Gregory Davis's NPI number?
- Gregory Davis's National Provider Identifier (NPI) is 1225157217, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Davis's specialty?
- Gregory Davis is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Gregory Davis located?
- Gregory Davis's practice location on file with NPPES is 1901 W Harrison St, Chicago, IL 60612-3714.
- What is Gregory Davis's phone number?
- The practice phone number listed in the NPPES registry for Gregory Davis is (312) 864-6000.
- Is Gregory Davis's NPI active?
- Yes — Gregory Davis's NPI (1225157217) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.