Nicholas Zelinka
NPI 1063387835 · Addiction (Substance Use Disorder) Counselor · Antioch, CA
Nicholas Zelinka is a Addiction (Substance Use Disorder) Counselor provider in Antioch, CA (NPI 1063387835).
Provider details
- NPI number
- 1063387835
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
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
Under 1 yr in registry
- Profile completeness38% of score
83% 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
- 2025-10-09
- Last updated
- 2026-05-31
- Certified
- 2025-10-09
Frequently asked questions
- What is Nicholas Zelinka's NPI number?
- Nicholas Zelinka's National Provider Identifier (NPI) is 1063387835, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Zelinka's specialty?
- Nicholas Zelinka is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Nicholas Zelinka located?
- Nicholas Zelinka's practice location on file with NPPES is 1915 D St, Antioch, CA 94509-2571.
- What is Nicholas Zelinka's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Zelinka is (925) 754-3673.
- Is Nicholas Zelinka's NPI active?
- Yes — Nicholas Zelinka's NPI (1063387835) is active in the NPPES registry as of the last update on 2026-05-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.