NPPES file of Aug 9, 2026

McKenzie L. Sienkiewich

Behavior Analyst · Spanaway, WA

McKenzie L. Sienkiewich is a behavior analyst with a practice address in Spanaway, Washington, and NPI 1124673934, issued on Aug 8, 2019. Check the license (Washington RBT-19-9158, 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.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1124673934
Name
McKenzie L. Sienkiewich
Primary taxonomy
Behavior Analyst 103K00000X
License number
RBT-19-9158 WA
Self-reported in NPPES; status is on the state search
Practice location
27421 30TH Ave E, Spanaway, WA 98387
Phone
(253) 341-2835
Enumerated
Aug 8, 2019
Record last updated
Nov 6, 2024
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Verify McKenzie L. Sienkiewich in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Washington board licenses this profession
    Search for license RBT-19-9158    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Washington license search

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Behavior Analyst providers in Washington

There are 2,978 behavior analyst records in Washington. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 2,978 in Washington → Every provider in Spanaway →

Other behavior analyst records in Washington

  1. Cathi AakervikVancouver, WA1750852232
  2. Jasmine Abbott, B.A.Spokane, WA1750717112
  3. Sarha AbellSpokane Valley, WA1861135295
  4. Alexis Abrahams- LittleMoses Lake, WA1568991586
  5. Agata Acklin, MED.BCBA,LBALacey, WA1881103992
  6. Alexa AcostaOak Harbor, WA1184241523
  7. Angela AcostaPullman, WA1033865522
  8. Delaney AdamsPullman, WA1184463424
  9. Devyn AdamsLacey, WA1235602749
  10. Katharine AdamsVancouver, WA1124406798

Common questions

What is McKenzie L. Sienkiewich's NPI number?

McKenzie L. Sienkiewich's National Provider Identifier (NPI) is 1124673934, issued on Aug 8, 2019. An NPI identifies a provider in billing; it is not a license.

Where is McKenzie L. Sienkiewich located?

The NPPES record lists a practice address at 27421 30TH Ave E, Spanaway, WA, 98387. Phone: (253) 341-2835. Providers update this record themselves, so call before visiting.

How can I verify McKenzie L. Sienkiewich's license?

NPPES lists Washington license number RBT-19-9158, 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), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.