IndividualActive
Joshua Siewert, RBT
NPI 1649912684 · Behavior Analyst · Seattle, WA
Joshua Siewert, RBT is a Behavior Analyst provider in Seattle, WA (NPI 1649912684).
Provider details
- NPI number
- 1649912684
- Entity type
- Individual
- Primary specialty
- Behavior AnalystBehavioral Health & Social Service Providers
- Credential
- RBT
- Sex
- Male
- Sole proprietor
- No
- License
- APF-1639352293-25666 (WA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(60/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 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
6112 Gould Ave S
Seattle, WA 98108-2959
Phone: (206) 930-2438
Fax: (206) 299-9327
Street-level locationGet directions
Mailing address
3815 S Othello St Ste 100
Seattle, WA 98118-3510
Registry dates
- Enumerated
- 2022-04-11
- Last updated
- 2022-04-11
- Certified
- 2022-04-11
Frequently asked questions
- What is Joshua Siewert's NPI number?
- Joshua Siewert's National Provider Identifier (NPI) is 1649912684, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joshua Siewert's specialty?
- Joshua Siewert is listed in the NPPES registry with a primary specialty of Behavior Analyst (Behavioral Health & Social Service Providers).
- Where is Joshua Siewert located?
- Joshua Siewert's practice location on file with NPPES is 6112 Gould Ave S, Seattle, WA 98108-2959.
- What is Joshua Siewert's phone number?
- The practice phone number listed in the NPPES registry for Joshua Siewert is (206) 930-2438.
- Is Joshua Siewert's NPI active?
- Yes — Joshua Siewert's NPI (1649912684) is active in the NPPES registry as of the last update on 2022-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.