Joseph Castillo, RADT
NPI 1417666991 · Addiction (Substance Use Disorder) Counselor · Walnut Creek, CA
Joseph Castillo, RADT is a Addiction (Substance Use Disorder) Counselor provider in Walnut Creek, CA (NPI 1417666991).
Provider details
- NPI number
- 1417666991
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- RADT
- Sex
- Male
- Sole proprietor
- Yes
- License
- R1472390622 (CA)
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
3 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
Mailing address
Registry dates
- Enumerated
- 2022-11-23
- Last updated
- 2022-11-23
- Certified
- 2022-10-20
Frequently asked questions
- What is Joseph Castillo's NPI number?
- Joseph Castillo's National Provider Identifier (NPI) is 1417666991, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Castillo's specialty?
- Joseph Castillo is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Joseph Castillo located?
- Joseph Castillo's practice location on file with NPPES is 1776 Ygnacio Valley Rd Ste 206, Walnut Creek, CA 94598-3125.
- What is Joseph Castillo's phone number?
- The practice phone number listed in the NPPES registry for Joseph Castillo is (925) 278-1792.
- Is Joseph Castillo's NPI active?
- Yes — Joseph Castillo's NPI (1417666991) is active in the NPPES registry as of the last update on 2022-11-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.