Allyson Ylvisaker
NPI 1609601905 · Mental Health Counselor · Seattle, WA
Allyson Ylvisaker is a Mental Health Counselor provider in Seattle, WA (NPI 1609601905).
Provider details
- NPI number
- 1609601905
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
- License
- CO70106443 (WA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
1 yr 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
- 2024-09-05
- Last updated
- 2026-03-13
- Certified
- 2026-03-13
Frequently asked questions
- What is Allyson Ylvisaker's NPI number?
- Allyson Ylvisaker's National Provider Identifier (NPI) is 1609601905, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allyson Ylvisaker's specialty?
- Allyson Ylvisaker is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Allyson Ylvisaker located?
- Allyson Ylvisaker's practice location on file with NPPES is 1600 E Olive St, Seattle, WA 98122-2735.
- What is Allyson Ylvisaker's phone number?
- The practice phone number listed in the NPPES registry for Allyson Ylvisaker is (206) 901-2000.
- Is Allyson Ylvisaker's NPI active?
- Yes — Allyson Ylvisaker's NPI (1609601905) is active in the NPPES registry as of the last update on 2026-03-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.