Washington Medicaid (HCA)

MedicaidWA

ABA billing requirements · Source: Washington Apple Health — ABA Provider Guide

High confidence

Verified 2026-03-01

Authorization Requirements

Requires prior auth Yes

Initial auth duration6 months

Renewal auth duration6 months

Submission deadlineN/A

Unit tracking cadenceTotal

Requires FBA Yes

Diagnostic eval validityN/A

Re-eval cadenceN/A

State licensure requiredBCBA state licensure required via WA Department of Health

Documentation Requirements

Parent signatures required Yes

Start/stop times required Yes

Treatment plan componentsDiagnosis, Client's condition, Treatment goals, Intervention modalities and methods, Functional behavior assessment (FBA), Direct and indirect service hours, Discharge plan

Progress summary cadenceEvery 6 months

Policy Notes

Initial authorization is for up to six months. Recertification is required for continued services. A comprehensive diagnostic evaluation by a Center of Excellence (COE) is required to determine medical necessity. The treatment plan must be updated at least every six months.

CPT & Modifier Rules

CPT rules require a free account

View H-codes, modifiers, unit limits, and billing restrictions for Washington Medicaid (HCA).

Official policy source:Washington Apple Health — ABA Provider Guide

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Data last verified: 2026-03-01 · Confidence: High · See our methodology

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