William Sadler, LMHC
NPI 1558653873 · Mental Health Counselor · Federal Way, WA
William Sadler, LMHC is a Mental Health Counselor provider in Federal Way, WA (NPI 1558653873).
Provider details
- NPI number
- 1558653873
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- LMHC
- Sex
- Male
- Sole proprietor
- No
- License
- LH 60526515 (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
15 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
- 2011-05-04
- Last updated
- 2026-03-12
- Certified
- 2026-03-12
Frequently asked questions
- What is William Sadler's NPI number?
- William Sadler's National Provider Identifier (NPI) is 1558653873, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Sadler's specialty?
- William Sadler is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is William Sadler located?
- William Sadler's practice location on file with NPPES is 33400 9th Ave S Ste 100, Federal Way, WA 98003-2607.
- What is William Sadler's phone number?
- The practice phone number listed in the NPPES registry for William Sadler is (206) 567-7267.
- Is William Sadler's NPI active?
- Yes — William Sadler's NPI (1558653873) is active in the NPPES registry as of the last update on 2026-03-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.