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Washington - I/DD Services — Licensing, Medicaid Enrollment and Startup Requirements

Last reviewed: 2026-09-10

Washington's Developmental Disabilities Administration (DDA) funds supported living and residential habilitation through five Medicaid HCBS waivers, including the Core and Basic Plus waivers, governed by WAC 388-845. Providers deliver these services under the regulatory framework of Certified Community Residential Services and Supports, which encompasses instruction and support to clients living in their own homes or in contracted group facilities.

Prospective agencies must obtain a Certified Community Residential Services and Supports credential from the DSHS Residential Care Services division and secure a regional DDA Residential Services Contract under WAC 388-101D-0020 before billing ProviderOne. DDA regional offices control network entry by requiring a Letter of Intent and demonstrating regional need before an applicant is permitted to proceed to the certification and contracting phases.

1. Service Definition and Scope

In Washington, I/DD residential services are formally categorized as Certified Community Residential Services and Supports. This umbrella includes Supported Living, Group Homes, Group Training Homes, and Alternative Living services designed to support individuals in community settings.

The scope of services ranges from intermittent support for individuals in their own homes to 24-hour comprehensive residential habilitation. Services are authorized based on the DDA Assessment and the client's Person-Centered Service Plan.

2. Regulatory and Oversight Agencies

The Department of Social and Health Services (DSHS) is the primary operating agency for I/DD services in Washington. Within DSHS, the Developmental Disabilities Administration (DDA) manages the waivers, while Residential Care Services (RCS) handles provider certification.

The Washington State Health Care Authority (HCA) serves as the single state Medicaid agency, managing the ProviderOne MMIS system and overseeing federal Medicaid compliance.

3. Gatekeeping Prerequisites: Who Can Even Apply

Washington tightly controls entry into the DDA residential provider network through regional need assessments. A provider cannot simply apply for certification; they must first submit a Letter of Intent to the specific DDA Regional Office where they intend to operate.

If the Regional Office determines there is no current need for additional capacity in that county or region, the application process is halted. Furthermore, WAC 388-101D-0020 mandates that a provider must hold a separate residential services contract for each region where they receive referrals.

4. Licensure and Certification Requirements

Agencies providing Supported Living must be certified by DSHS Residential Care Services (RCS) as a Certified Community Residential Services and Supports provider. This certification evaluates the agency's policies, financial solvency, and administrative capacity.

Group Homes must hold a dual credential: an underlying facility license (such as an Adult Family Home or Assisted Living Facility license) and a DDA residential contract.

5. Medicaid Provider Enrollment

Once certified by RCS and contracted with DDA, providers must enroll in ProviderOne, Washington's Medicaid Management Information System (MMIS) operated by the Health Care Authority (HCA).

Enrollment requires signing a Core Provider Agreement with HCA and linking the provider's National Provider Identifier (NPI) to their DDA contract and taxonomy codes.

6. Staffing, Training and Background Checks

Washington mandates strict background checks through the Background Check Central Unit (BCCU). WAC 388-101D-0070 requires national fingerprint background checks for all staff hired after January 1, 2016, who are not disqualified by the initial name and date of birth check.

Direct support professionals must complete extensive training, including the DDA 101 curriculum, CPR/First Aid, and bloodborne pathogens training before working independently with clients.

7. Documentation, Policies and Records

Certified providers must maintain rigorous documentation of client care, medication administration, and incident reporting. DSHS conducts regular unannounced surveys to audit these records.

Medication management is heavily scrutinized. WAC 388-101D-0345 dictates precise procedures for the disposal of discontinued or expired medications, requiring dual signatures.

8. Billing, Rates and Claims

Providers submit claims through the ProviderOne system. Supported Living rates are established by DDA using a standardized rate model that factors in client acuity, geographic location, and staff wages.

Client acuity is determined by the DDA Assessment, which assigns individuals to specific support levels that dictate the authorized hours and corresponding reimbursement rates.

9. Approval Sequence and Timeline

The approval process is sequential and can take 6 to 12 months. It begins with the Letter of Intent to the DDA Regional Office. If regional need is established, the provider applies for RCS certification.

Following RCS certification, the provider executes the DDA Residential Services Contract and finally enrolls in ProviderOne to begin billing.

10. Common Denials and Survey Findings

Applications are most frequently denied at the Letter of Intent stage due to a lack of regional need. During RCS certification, applications stall if policy manuals fail to align with WAC 388-101D requirements.

During post-certification surveys, RCS frequently cites providers for lapses in background check renewals and medication administration errors.

11. Key Contacts and Resources

Prospective providers should consult the DDA Providers and Advocates page and the DSHS Residential Care Services page for current forms, training schedules, and regional office contacts.

The Washington Administrative Code (WAC) is the definitive source for all regulatory requirements.

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