Gerald Nissley, PSY.D.
NPI 1225332711 · Clinical Psychologist · Marshall, TX
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gerald Nissley, PSY.D. is a Clinical Psychologist provider in Marshall, TX (NPI 1225332711).
Provider details
- NPI number
- 1225332711
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 34733 (TX)
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
15 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 505 E Travis St Ste 208Marshall, TX 75670-4281Phone: (903) 471-0274Fax: (800) 915-4057
Registry dates
- Enumerated
- 2010-12-27
- Last updated
- 2023-07-08
- Certified
- 2023-07-08
Frequently asked questions
- What is Gerald Nissley's NPI number?
- Gerald Nissley's National Provider Identifier (NPI) is 1225332711, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gerald Nissley's specialty?
- Gerald Nissley is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Gerald Nissley located?
- Gerald Nissley's practice location on file with NPPES is 505 E Travis St Ste 105, Marshall, TX 75670-4280.
- What is Gerald Nissley's phone number?
- The practice phone number listed in the NPPES registry for Gerald Nissley is (903) 471-0274.
- Does Gerald Nissley accept Medicare?
- Gerald Nissley is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gerald Nissley's NPI active?
- Yes — Gerald Nissley's NPI (1225332711) is active in the NPPES registry as of the last update on 2023-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.