Gregory Hollis, PH.D.
NPI 1982855276 · Clinical Neuropsychologist · Saint Louis, MO
Gregory Hollis, PH.D. is a Clinical Neuropsychologist provider in Saint Louis, MO (NPI 1982855276).
Provider details
- NPI number
- 1982855276
- Entity type
- Individual
- Primary specialty
- Clinical NeuropsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- PSY001417 (GA)
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
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
- 2008-10-05
- Last updated
- 2008-10-05
Frequently asked questions
- What is Gregory Hollis's NPI number?
- Gregory Hollis's National Provider Identifier (NPI) is 1982855276, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Hollis's specialty?
- Gregory Hollis is listed in the NPPES registry with a primary specialty of Clinical Neuropsychologist (Behavioral Health & Social Service Providers).
- Where is Gregory Hollis located?
- Gregory Hollis's practice location on file with NPPES is 12647 Olive Blvd, Saint Louis, MO 63141-6393.
- What is Gregory Hollis's phone number?
- The practice phone number listed in the NPPES registry for Gregory Hollis is (800) 325-3982.
- Is Gregory Hollis's NPI active?
- Yes — Gregory Hollis's NPI (1982855276) is active in the NPPES registry as of the last update on 2008-10-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.