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Washington - Autism Service — Licensing, Medicaid Enrollment and Startup Requirements

Last reviewed: 2026-09-10

Washington's Health Care Authority (HCA) funds Applied Behavior Analysis (ABA) through the Apple Health program under Chapter 182-531A WAC, requiring providers to hold specific Department of Health (DOH) credentials. Agencies enrolling to bill for these services must first secure licensure as a community behavioral health agency through the Department of Social and Health Services (DSHS) or DOH before HCA will process a Core Provider Agreement.

The approval sequence mandates that individual practitioners obtain Licensed Behavior Analyst (LBA) or Certified Behavior Technician (CBT) credentials from DOH prior to linking to an enrolled agency in the ProviderOne MMIS. Agencies must also separately credential and contract with Washington's five Managed Care Organizations (MCOs) to access the majority of the Apple Health client base.

1. Service Definition and Scope

Under Washington Apple Health, ABA services assist clients age 20 and younger in developing functional behaviors. The service is governed by WAC 182-531A and includes assessments, direct intervention, and family training.

Providers can enroll under an Independent Practitioner model or an Agency Enrollment model, depending on their business structure and licensure.

2. Regulatory and Oversight Agencies

Multiple state entities oversee ABA delivery in Washington. DOH handles professional licensing, while HCA manages Medicaid enrollment and billing rules.

Agencies may also fall under the jurisdiction of DSHS if they operate as community mental health agencies.

3. Gatekeeping Prerequisites: Who Can Even Apply

Washington requires organizational providers to hold specific facility or agency licensure before applying for Medicaid enrollment. Without this underlying agency license, HCA will not process the ProviderOne application.

Additionally, providers must secure contracts with Managed Care Organizations to serve most clients, as fee-for-service Apple Health covers only a fraction of the population.

4. Licensure and Certification Requirements

Individual practitioners delivering ABA must be licensed or certified by the Washington State Department of Health. Agencies must ensure all performing providers hold active credentials.

Supervision structures must be explicitly documented and attested to by agency leadership during the enrollment process.

5. Medicaid Provider Enrollment

Enrollment is processed entirely through the ProviderOne MMIS portal. Providers must complete a Core Provider Agreement (CPA) and submit all supplemental paperwork for their specific provider type.

Federal regulations require HCA to screen and enroll every provider who serves the Apple Health population, even those who only bill through MCOs.

6. Staffing, Training and Background Checks

Staff must meet the educational and experiential qualifications outlined in WAC 246-810 and Title 18 RCW. Supervisors must attest to the competence of their assistants.

Background checks are required as part of the DOH professional licensing process before a practitioner can be added to an agency's ProviderOne roster.

7. Documentation, Policies and Records

Agencies must maintain and submit specific operational documents for HCA review during enrollment. This includes structural and financial documentation.

Corporate governance details must be fully disclosed to HCA to comply with federal screening requirements.

8. Billing, Rates and Claims

Claims are submitted via ProviderOne using specific taxonomy codes that must match the provider's NPI registry profile. HCA publishes an annual ABA Program Billing Guide detailing current procedure codes.

Strict NPI enforcement means that claims missing a valid rendering provider NPI will be automatically denied.

9. Approval Sequence and Timeline

The approval process is strictly sequential. Professional licensing must precede agency licensing, which must precede Medicaid enrollment.

Once HCA approves the ProviderOne application, agencies must still complete credentialing with individual MCOs before seeing managed care patients.

10. Common Denials and Survey Findings

HCA frequently issues deficiency notices for incomplete applications or mismatched data. Providers have 30 days to correct these deficiencies before a formal denial is issued.

Most delays stem from administrative oversights rather than structural disqualifications.

11. Key Contacts and Resources

Providers should rely on official HCA and DOH portals for the most current forms, billing guides, and provider alerts.

The ProviderOne portal is the central hub for all enrollment status checks and fee-for-service claims.

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