Jason Zelis
NPI 1366967259 · Addiction (Substance Use Disorder) Counselor · Clayton, CA
Jason Zelis is a Addiction (Substance Use Disorder) Counselor provider in Clayton, CA (NPI 1366967259).
Provider details
- NPI number
- 1366967259
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 9078-R (CA)
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
8 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
- 2017-08-11
- Last updated
- 2017-08-11
Frequently asked questions
- What is Jason Zelis's NPI number?
- Jason Zelis's National Provider Identifier (NPI) is 1366967259, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jason Zelis's specialty?
- Jason Zelis is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Jason Zelis located?
- Jason Zelis's practice location on file with NPPES is 11540 Marsh Creek Rd, Clayton, CA 94517-9759.
- What is Jason Zelis's phone number?
- The practice phone number listed in the NPPES registry for Jason Zelis is (925) 672-5700.
- Is Jason Zelis's NPI active?
- Yes — Jason Zelis's NPI (1366967259) is active in the NPPES registry as of the last update on 2017-08-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.