IndividualActive
William Castellon
NPI 1700546058 · Behavior Technician · El Monte, CA
William Castellon is a Behavior Technician provider in El Monte, CA (NPI 1700546058).
Provider details
- NPI number
- 1700546058
- Entity type
- Individual
- Primary specialty
- Behavior TechnicianBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 106S00000X (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(61/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 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
4823 Durfee Ave
El Monte, CA 91732-1727
Phone: (626) 643-1040
Street-level locationGet directions
Mailing address
4823 Durfee Ave
El Monte, CA 91732-1727
Registry dates
- Enumerated
- 2021-12-28
- Last updated
- 2021-12-28
- Certified
- 2021-12-28
Frequently asked questions
- What is William Castellon's NPI number?
- William Castellon's National Provider Identifier (NPI) is 1700546058, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Castellon's specialty?
- William Castellon is listed in the NPPES registry with a primary specialty of Behavior Technician (Behavioral Health & Social Service Providers).
- Where is William Castellon located?
- William Castellon's practice location on file with NPPES is 4823 Durfee Ave, El Monte, CA 91732-1727.
- What is William Castellon's phone number?
- The practice phone number listed in the NPPES registry for William Castellon is (626) 643-1040.
- Is William Castellon's NPI active?
- Yes — William Castellon's NPI (1700546058) is active in the NPPES registry as of the last update on 2021-12-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.