Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MISS CHELSEA MCMAHAN MS, BCBA
NPI 1114427127
Behavior Analyst in Lynnwood, WA

Q: What is Chelsea Mcmahan's NPI number?

The NPI number for Chelsea Mcmahan is 1114427127. It was assigned to this individual provider in the NPPES registry on February 16, 2018.

Q: What is Chelsea Mcmahan's specialty?

The primary specialty registered for this NPI is Behavior Analyst with taxonomy code 103K00000X.

Q: When was this NPI record last updated?

The NPPES record for Chelsea Mcmahan was last updated on August 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since February 16, 2018

20816 44TH AVE W STE 103, LYNNWOOD, WA 98036(877) 603-6967 Get Directions Write a Review

NPPES record last updated: August 10, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 10, 2026, Feb 16, 2018 (2 updates tracked since 2018).

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About Miss Chelsea Mcmahan Ms, Bcba NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MISS CHELSEA MCMAHAN MS, BCBA (NPI 1114427127) is an individual behavior analyst provider in Lynnwood, Washington, licensed in Washington (BA61184831) and active in the NPI registry since February 2018.

NPPES Registry Identity

NPI1114427127

Entity TypeIndividualFemale

Primary Taxonomy103K00000X

Provider Legal NameMISS CHELSEA MCMAHANCredential: MS, BCBA

Location Address20816 44TH AVE W STE 103Lynnwood, WA 98036-7744

Mailing Address542 Amherst St Ste BNashua, NH 03063-1016 · (877) 603-6967

Phone(877) 603-6967

Sole ProprietorNo

Enumeration DateFebruary 16, 2018

Last NPPES UpdateAugust 10, 20262 updates tracked since enumeration

NPPES CertifiedAugust 10, 2026

✔ NPI 1114427127 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyBehavior AnalystBehavioral Health & Social Service Providers

Taxonomy Code103K00000X

License✔ Licensed in WA · BA61184831

Definition

A behavior analyst is qualified by at least a master's degree and Behavior Analyst Certification Board certification and/or a state-issued credential (such as a license) to practice behavior analysis independently. Behavior analysts provide the required supervision to assistant behavior analysts and behavior technicians. A behavior analyst delivers services consistent with the dimensions of applied behavior analysis. Common services may include, but are not limited to, conducting behavioral assessments, analyzing data, writing and revising behavior-analytic treatment plans, training others to implement components of treatment plans, and overseeing implementation of treatment plans.

Also ListedBehavior TechnicianTaxonomy 106S00000X · License RBT-17-32910 (WA)

20816 44TH AVE W STE 103, Lynnwood, WA 98036

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Kaiser Permanente, Moda Health Plan, Inc., Providence Health Plan.Insurance ›

Other Providers at the Same Location NPPES 9

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JENNIFER DYER

Behavior Analyst