William Castillo, LMHC, CDP
NPI 1164864971 · Mental Health Counselor · Seattle, WA
William Castillo, LMHC, CDP is a Mental Health Counselor provider in Seattle, WA (NPI 1164864971).
Provider details
- NPI number
- 1164864971
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- LMHC, CDP
- Sex
- Male
- Sole proprietor
- Yes
- License
- LH60208827 (WA)
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
12 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
- 2013-07-22
- Last updated
- 2013-07-22
Frequently asked questions
- What is William Castillo's NPI number?
- William Castillo's National Provider Identifier (NPI) is 1164864971, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Castillo's specialty?
- William Castillo is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is William Castillo located?
- William Castillo's practice location on file with NPPES is 1725 Roxbury Avenue Sw, Seattle, WA 98106.
- What is William Castillo's phone number?
- The practice phone number listed in the NPPES registry for William Castillo is (206) 932-6638.
- Is William Castillo's NPI active?
- Yes — William Castillo's NPI (1164864971) is active in the NPPES registry as of the last update on 2013-07-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.