Gregory Bailey, PH.D.
NPI 1821251935 · Clinical Psychologist · Chicago, IL
Gregory Bailey, PH.D. is a Clinical Psychologist provider in Chicago, IL (NPI 1821251935).
Provider details
- NPI number
- 1821251935
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 071-006485 (IL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
17 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
- 2008-07-08
- Last updated
- 2008-07-08
Frequently asked questions
- What is Gregory Bailey's NPI number?
- Gregory Bailey's National Provider Identifier (NPI) is 1821251935, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Bailey's specialty?
- Gregory Bailey is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Gregory Bailey located?
- Gregory Bailey's practice location on file with NPPES is 180 N Michigan Ave, Chicago, IL 60601-7401.
- What is Gregory Bailey's phone number?
- The practice phone number listed in the NPPES registry for Gregory Bailey is (312) 423-5651.
- Is Gregory Bailey's NPI active?
- Yes — Gregory Bailey's NPI (1821251935) is active in the NPPES registry as of the last update on 2008-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.