Joan Simon Oncken, LMFT
NPI 1720256183 · Marriage & Family Therapist · Lynnwood, WA
Joan Simon Oncken, LMFT is a Marriage & Family Therapist provider in Lynnwood, WA (NPI 1720256183).
Provider details
- NPI number
- 1720256183
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- LMFT
- Sex
- Female
- Sole proprietor
- Yes
- License
- LF00000836 (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
18 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
- 2008-02-19
- Last updated
- 2008-02-19
Frequently asked questions
- What is Joan Simon Oncken's NPI number?
- Joan Simon Oncken's National Provider Identifier (NPI) is 1720256183, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joan Simon Oncken's specialty?
- Joan Simon Oncken is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Joan Simon Oncken located?
- Joan Simon Oncken's practice location on file with NPPES is 4215 198th St Sw, Lynnwood, WA 98036-6738.
- What is Joan Simon Oncken's phone number?
- The practice phone number listed in the NPPES registry for Joan Simon Oncken is (425) 771-1914.
- Is Joan Simon Oncken's NPI active?
- Yes — Joan Simon Oncken's NPI (1720256183) is active in the NPPES registry as of the last update on 2008-02-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.