IndividualActive
Stephen Asztalos
NPI 1497636583 · Mental Health Counselor · Fremont, CA
Stephen Asztalos is a Mental Health Counselor provider in Fremont, CA (NPI 1497636583).
Provider details
- NPI number
- 1497636583
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- APCC20108 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(54/100 index)
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
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
3300 Capitol Ave Bldg B
Fremont, CA 94538-1514
Phone: (510) 574-2202
Approximate (ZIP-level) locationGet directions
Mailing address
1615 Leimert Blvd
Oakland, CA 94602-1927
Registry dates
- Enumerated
- 2025-09-08
- Last updated
- 2025-09-24
- Certified
- 2025-09-24
Frequently asked questions
- What is Stephen Asztalos's NPI number?
- Stephen Asztalos's National Provider Identifier (NPI) is 1497636583, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Asztalos's specialty?
- Stephen Asztalos is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Stephen Asztalos located?
- Stephen Asztalos's practice location on file with NPPES is 3300 Capitol Ave Bldg B, Fremont, CA 94538-1514.
- What is Stephen Asztalos's phone number?
- The practice phone number listed in the NPPES registry for Stephen Asztalos is (510) 574-2202.
- Is Stephen Asztalos's NPI active?
- Yes — Stephen Asztalos's NPI (1497636583) is active in the NPPES registry as of the last update on 2025-09-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.