Alexander Sylvester
NPI 1104442524 · Mental Health Counselor · Seattle, WA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Sylvester is a Mental Health Counselor provider in Seattle, WA (NPI 1104442524).
Provider details
- NPI number
- 1104442524
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
- Clinical Social Worker1041C0700X
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
6 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 720 14th AveLongview, WA 98632-2315Phone: (360) 423-0203Fax: (360) 577-0269
Registry dates
- Enumerated
- 2020-06-22
- Last updated
- 2021-01-28
- Certified
- 2021-01-28
Frequently asked questions
- What is Alexander Sylvester's NPI number?
- Alexander Sylvester's National Provider Identifier (NPI) is 1104442524, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Sylvester's specialty?
- Alexander Sylvester is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Alexander Sylvester located?
- Alexander Sylvester's practice location on file with NPPES is 222 Wall St Ste 100, Seattle, WA 98121-1431.
- What is Alexander Sylvester's phone number?
- The practice phone number listed in the NPPES registry for Alexander Sylvester is (206) 441-3043.
- Does Alexander Sylvester accept Medicare?
- Alexander Sylvester is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Sylvester's NPI active?
- Yes — Alexander Sylvester's NPI (1104442524) is active in the NPPES registry as of the last update on 2021-01-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.