Joshua Siewert, RBT
Behavior Analyst · Seattle, WA
Joshua Siewert, RBT is a behavior analyst with a practice address in Seattle, Washington, and NPI 1649912684, issued on Apr 11, 2022. Check the license (Washington APF-1639352293-25666, as entered in NPPES) with the Washington board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Joshua Siewert
- Credential
- RBT
- Primary taxonomy
- Behavior Analyst 103K00000X
- License number
- APF-1639352293-25666 WA
Self-reported in NPPES; status is on the state search - Practice location
- 6112 Gould Ave S, Seattle, WA 98108
- Phone
- (206) 930-2438
- Enumerated
- Apr 11, 2022
- Entity
- Type 1 · individual
Also registered at 6112 Gould Ave S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gabriela AriasBehavior Analyst1831761162
- John BarchardBehavior Technician1285419184
- Gregory BettridgeBehavior Analyst1619693884
- Dominique BrattesaniBehavior Technician1720921158
- Stephen BuckinghamBehavior Technician1487571055
- Apollo CalleroBehavior Technician1780518464
Verify Joshua Siewert in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license APF-1639352293-25666Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Behavior Analyst providers in Washington
There are 2,916 behavior analyst records in Washington. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other behavior analyst records in Washington
- Cathi AakervikVancouver, WA1750852232
- Sarha AbellSpokane Valley, WA1861135295
- Alexis Abrahams- LittleMoses Lake, WA1568991586
- Agata Acklin, MED.BCBA,LBALacey, WA1881103992
- Alexa AcostaOak Harbor, WA1184241523
- Angela AcostaPullman, WA1033865522
- Delaney AdamsPullman, WA1184463424
- Devyn AdamsLacey, WA1235602749
- Katharine AdamsVancouver, WA1124406798
- Lauren Adams, M.S., BCBA, LBABellevue, WA1982241022
Common questions
What is Joshua Siewert, RBT's NPI number?
Joshua Siewert, RBT's National Provider Identifier (NPI) is 1649912684, issued on Apr 11, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Joshua Siewert, RBT located?
The NPPES record lists a practice address at 6112 Gould Ave S, Seattle, WA, 98108. Phone: (206) 930-2438. Providers update this record themselves, so call before visiting.
How can I verify Joshua Siewert, RBT's license?
NPPES lists Washington license number APF-1639352293-25666, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.