James Sisung, PSYD
NPI 1790921963 · Clinical Neuropsychologist · Mather, CA
Enrolled with Medicare as Order and Referring Only - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Sisung, PSYD is a Clinical Neuropsychologist provider in Mather, CA (NPI 1790921963).
Provider details
- NPI number
- 1790921963
- Entity type
- Individual
- Primary specialty
- Clinical NeuropsychologistBehavioral Health & Social Service Providers
- Credential
- PSYD
- Sex
- Male
- Sole proprietor
- No
- License
- PS1271 (ME)
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
- 2008-12-18
- Last updated
- 2026-04-20
- Certified
- 2026-04-20
Frequently asked questions
- What is James Sisung's NPI number?
- James Sisung's National Provider Identifier (NPI) is 1790921963, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Sisung's specialty?
- James Sisung is listed in the NPPES registry with a primary specialty of Clinical Neuropsychologist (Behavioral Health & Social Service Providers).
- Where is James Sisung located?
- James Sisung's practice location on file with NPPES is 10535 Hospital Way, Mather, CA 95655-4200.
- What is James Sisung's phone number?
- The practice phone number listed in the NPPES registry for James Sisung is (707) 888-3179.
- Does James Sisung accept Medicare?
- James Sisung is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Sisung's NPI active?
- Yes — James Sisung's NPI (1790921963) is active in the NPPES registry as of the last update on 2026-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.