1. Home
  2. Directory
  3. California
  4. Fremont
  5. Counselor
  6. NPI Profile

DR. STEPHEN ASZTALOS
NPI 1497636583
Counselor - Mental Health in Fremont, CA

Active since September 08, 2025
3300 CAPITOL AVE BLDG B, FREMONT, CA 94538(510) 574-2202 Get Directions Write a Review

NPPES record last updated: September 24, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Stephen Asztalos NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. STEPHEN ASZTALOS (NPI 1497636583) is an individual mental health provider in Fremont, California, licensed in California (APCC20108) and active in the NPI registry since September 2025.

NPPES Registry Identity

NPI1497636583
Entity TypeIndividualMale
Primary Taxonomy101YM0800X
Provider Legal NameDR. STEPHEN ASZTALOS
Location Address3300 CAPITOL AVE BLDG BFremont, CA 94538-1514
Mailing Address1615 Leimert BlvdOakland, CA 94602-1927 · (510) 508-6548
Phone(510) 574-2202
Sole ProprietorYes
Enumeration DateSeptember 8, 2025
Last NPPES UpdateSeptember 24, 2025
NPPES CertifiedSeptember 24, 2025
✔ NPI 1497636583 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
License✔ Licensed in CA · APCC20108
3300 CAPITOL AVE BLDG B, Fremont, CA 94538
Open in Google Maps ↗

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ALYSSA BETH LOCQUIAO
Student in an Organized Health Care Education/Training Program
3300 CAPITOL AVE BLDG B
FREMONT, CA 94538
Alameda County (510) 574-2032
MS. ELLA CARRELL
Student in an Organized Health Care Education/Training Program
3300 CAPITOL AVE BLDG B
FREMONT, CA 94538
Alameda County (510) 574-2032
NEELAMA NISHA RAJ
Social Worker
3300 CAPITOL AVE BLDG B
FREMONT, CA 94538
Alameda County (510) 574-2052
SHREYA PATEL
Student in an Organized Health Care Education/Training Program
3300 CAPITOL AVE BLDG B
FREMONT, CA 94538
Alameda County (510) 574-2032
CHARLES JOHNSON JR.
Case Manager/Care Coordinator
3300 CAPITOL AVE BLDG B
FREMONT, CA 94538
Alameda County (510) 574-2077
ANASTASIYA KARPELEVITCH
Counselor (Mental Health)
3300 CAPITOL AVE BLDG B
FREMONT, CA 94538
Alameda County (510) 574-2032
ERIKA CHAVEZ
Student in an Organized Health Care Education/Training Program
3300 CAPITOL AVE BLDG B
FREMONT, CA 94538
Alameda County (510) 574-2050
JESLEEN SINGH
Social Worker
3300 CAPITOL AVE BLDG B
FREMONT, CA 94538
Alameda County (510) 574-2064

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Stephen Asztalos's NPI number?

The NPI number for Stephen Asztalos is 1497636583. It was assigned to this individual provider in the NPPES registry on September 8, 2025.

Where is Stephen Asztalos located?

Stephen Asztalos practices at 3300 Capitol Ave Bldg B, Fremont, CA 94538. The listed phone number is (510) 574-2202.

What is Stephen Asztalos's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

When was this NPI record last updated?

The NPPES record for Stephen Asztalos was last updated on September 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.