IndividualActive
Marissa Alonso
NPI 1275496044 · Behavior Technician · Norwalk, CA
Marissa Alonso is a Behavior Technician provider in Norwalk, CA (NPI 1275496044).
Provider details
- NPI number
- 1275496044
- Entity type
- Individual
- Primary specialty
- Behavior TechnicianBehavioral Health & Social Service Providers
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Basic profile(47/100 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
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
12440 Firestone Blvd Ste 2001
Norwalk, CA 90650-4374
Phone: (562) 245-4130
Street-level locationGet directions
Mailing address
100 N Pacific Coast Hwy Ste 1400
El Segundo, CA 90245-5602
Registry dates
- Enumerated
- 2025-12-08
- Last updated
- 2025-12-08
- Certified
- 2025-12-08
Frequently asked questions
- What is Marissa Alonso's NPI number?
- Marissa Alonso's National Provider Identifier (NPI) is 1275496044, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Alonso's specialty?
- Marissa Alonso is listed in the NPPES registry with a primary specialty of Behavior Technician (Behavioral Health & Social Service Providers).
- Where is Marissa Alonso located?
- Marissa Alonso's practice location on file with NPPES is 12440 Firestone Blvd Ste 2001, Norwalk, CA 90650-4374.
- What is Marissa Alonso's phone number?
- The practice phone number listed in the NPPES registry for Marissa Alonso is (562) 245-4130.
- Is Marissa Alonso's NPI active?
- Yes — Marissa Alonso's NPI (1275496044) is active in the NPPES registry as of the last update on 2025-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.