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

Last reviewed: 2026-08-16

In Washington State, Intellectual and Developmental Disabilities (I/DD) services are administered by the Department of Social and Health Services (DSHS) Developmental Disabilities Administration (DDA). The state operates five 1915(c) Home and Community-Based Services (HCBS) waivers—Basic Plus, Core, Individual and Family Services (IFS), Children's Intensive In-Home Behavioral Support (CIIBS), and Community Protection—offering a full array of services from intermittent community inclusion to 24-hour Supported Living.

The single biggest structural barrier to entry in Washington is the DSHS DDA contracting and Residential Care Services (RCS) certification bottleneck. Prospective providers cannot simply submit a Medicaid enrollment application; they must first secure a DDA contract and, for residential services like Supported Living, pass a rigorous initial certification evaluation by DSHS RCS under WAC 388-101D before the Health Care Authority (HCA) will issue a ProviderOne billing ID.

1. Service Definition and Scope

Washington's DDA waivers provide community-based alternatives to Intermediate Care Facilities for Individuals with Intellectual Disabilities (ICF/IID). The service array is designed to promote independence, community integration, and health and safety for eligible participants.

Services range from hourly support to round-the-clock care. Providers must be specifically contracted for the exact service categories they intend to deliver, and scope is strictly governed by the client's Person-Centered Service Plan (PCSP).

• Supported Living: 24-hour instruction and support services provided in the client's own home, governed by WAC 388-101D.
• Community Inclusion: Individualized services designed to increase a client's access to and participation in community activities.
• Respite Care: Short-term relief for primary caregivers, which can be provided in the client's home or in a licensed facility.
• Staff and Family Consultation: Professional assistance to help families or direct service providers better meet the specific needs of the person they support.
• Employment Supports: Services to help clients obtain and maintain competitive employment in integrated settings.
• Target Population: Individuals meeting DDA eligibility criteria under WAC 388-823, requiring an ICF/IID level of care.

2. Regulatory and Oversight Agencies

Oversight of I/DD waiver services in Washington is divided between the operating agency (DSHS) and the single state Medicaid agency (HCA). DSHS handles the day-to-day waiver operations, provider contracting, and facility certification.

The Department of Health (DOH) also plays a role if an agency provides direct in-home personal care outside of the Supported Living certification framework.

• DSHS Developmental Disabilities Administration (DDA): Operates the waivers, determines client eligibility, and manages provider contracts (https://www.dshs.wa.gov/dda).
• DSHS Residential Care Services (RCS): A division of the Aging and Long-Term Support Administration (ALTSA) that certifies Supported Living providers (https://www.dshs.wa.gov/altsa/residential-care-services).
• Washington State Health Care Authority (HCA): The single state Medicaid agency responsible for overall Medicaid administration and the ProviderOne system (https://www.hca.wa.gov).
• Department of Health (DOH): Licenses Home Care Agencies and Home Health Agencies under WAC 246-335 (https://doh.wa.gov).

3. Gatekeeping Prerequisites: Who Can Even Apply

Washington does not require a Certificate of Need for HCBS I/DD waivers, but it strictly controls market entry through DDA contracting prerequisites. You cannot enroll as a DDA waiver provider in the ProviderOne Medicaid portal without an active DSHS contract.

For certain services, such as employment and day programs, DDA delegates contracting to individual counties, meaning providers must secure a county-level contract before DDA will recognize them.

• DDA Contract Requirement: Applicants must successfully apply for and be awarded a DDA contract before Medicaid enrollment is permitted.
• RCS Initial Certification: Supported Living providers must pass an initial RCS certification evaluation before receiving a standard DDA contract.
• County Sponsorship/Contracts: Providers of Individual Supported Employment or Community Inclusion must often secure a contract with the specific county's developmental disabilities board before DDA will authorize services.
• Business Licensing: Applicants must possess a Universal Business Identifier (UBI) and Master Business License issued by the Washington State Department of Revenue.
• No Standalone Medicaid Enrollment: HCA will automatically reject any ProviderOne enrollment application for DDA waiver services that does not include proof of an active DSHS/DDA contract.

4. Licensure and Certification Requirements

Washington does not issue a single generic "I/DD license." Instead, providers are certified or licensed based on the specific service model. Supported Living providers are certified by DSHS RCS under WAC 388-101D.

Agencies providing in-home personal care or respite without a Supported Living certification must obtain a Home Care Agency license from the Department of Health (DOH).

• Supported Living Certification: Governed by WAC 388-101D; requires submission of operational policies, procedures, and an initial on-site evaluation by RCS.
• Home Care Agency License: Required by DOH under WAC 246-335 if providing in-home personal care; requires a full-time equivalent worksheet and organizational structure description.
• Administrator Qualifications: Supported Living administrators must have a bachelor's degree and one year of experience, or an associate degree and two years of experience, per WAC 388-101D-0030.
• DOH Licensing Fees: Initial Home Care Agency license fees range from $1,500 to over $2,500 depending on the number of full-time equivalents (FTEs).
• RCS Certification Fees: DSHS does not currently charge a standalone fee for Supported Living certification, but the compliance and documentation burden is extensive.

5. Medicaid Provider Enrollment

Once certified and contracted with DSHS DDA, providers must enroll in Washington's Medicaid Management Information System (MMIS), known as ProviderOne. This system is managed by the Health Care Authority (HCA).

Providers must sign a Core Provider Agreement (CPA) and enroll under specific taxonomy codes that match their DDA contract authorizations.

• ProviderOne Portal: The centralized MMIS for all Washington Medicaid enrollment, prior authorizations, and claims (https://www.hca.wa.gov/billers-providers-partners/providerone).
• Core Provider Agreement (CPA): The mandatory contract between the provider and HCA to participate in Washington Apple Health (Medicaid).
• NPI Requirement: Clinical and agency providers must obtain a National Provider Identifier (NPI); atypical providers (e.g., vehicle modifications) may enroll without an NPI but still need a ProviderOne ID.
• Taxonomy Codes: Providers must select the correct taxonomy (e.g., 253Z00000X for In Home Supportive Care) that aligns with their DDA-approved services.
• Revalidation: Medicaid enrollment must be revalidated through ProviderOne every five years.

6. Staffing, Training and Background Checks

Washington has some of the strictest training requirements in the nation for direct support professionals (DSPs), driven by state law (Initiative 1163). All staff must clear state and federal background checks before having unsupervised access to clients.

Background checks are centralized through the DSHS Background Check Central Unit (BCCU), and training must be DSHS-approved.

• BCCU Background Checks: Mandatory pre-employment background checks processed through the DSHS BCCU system, including fingerprinting for all direct care staff.
• 75-Hour Basic Training: DSPs providing personal care must complete 75 hours of DSHS-approved basic training within 120 days of hire.
• Home Care Aide (HCA) Certification: Staff must pass the state exam to become a certified Home Care Aide within 200 days of hire.
• CPR/First Aid: All direct care staff must maintain current CPR and First Aid certification before working alone with clients.
• Continuing Education: 12 hours of DSHS-approved continuing education is required annually for all certified DSPs.
• Bloodborne Pathogens: Mandatory training on HIV/AIDS and bloodborne pathogens prior to client contact.

7. Documentation, Policies and Records

Providers must maintain comprehensive records compliant with WAC 388-101D and DDA policies. Documentation must prove that services were delivered exactly as authorized in the client's Person-Centered Service Plan (PCSP).

The state conducts regular, unannounced surveys to audit these records, focusing heavily on health, safety, and financial protections.

• Person-Centered Service Plan (PCSP): Providers must retain the DDA-approved PCSP and document daily service delivery against its specific goals.
• Incident Reporting: Mandatory reporting of abuse, neglect, or exploitation to DSHS Adult Protective Services (APS) and DDA within strict timeframes (often 24 hours).
• Medication Administration Records (MAR): Strict policies and daily logs required for any medication assistance or administration.
• Client Funds Management: Detailed ledgers and receipts must be maintained if the provider acts as a representative payee or assists with client finances.
• Record Retention: Client and agency records must generally be retained for a minimum of six years following the termination of services.

8. Billing, Rates and Claims

Billing for DDA waiver services is conducted electronically through the ProviderOne portal. Rates are established by the Washington State Legislature and published by DDA.

Services cannot be billed until they are prior-authorized in ProviderOne by the client's DDA Case Manager.

• ProviderOne Billing: All claims must be submitted electronically via the ProviderOne portal using HIPAA-compliant 837P formats or direct data entry.
• DDA Rate Schedule: Rates are standardized, published on the DDA website, and vary by service type and geographic region (e.g., King County often has a higher rate tier).
• Prior Authorization: A valid authorization from the DDA Case Manager must be present in ProviderOne; claims submitted without prior authorization will automatically deny.
• Daily vs. Hourly Rates: Supported Living is typically billed at a daily rate based on the client's assessed support needs, while respite and community inclusion are billed hourly.
• Client Participation: Providers are responsible for collecting any required "client participation" (share of cost) directly from the client, which is deducted from the Medicaid payment.

9. Approval Sequence and Timeline

Becoming a fully approved DDA waiver provider in Washington is a lengthy, sequential process. Applicants should expect the entire timeline to take between 6 and 12 months.

You cannot skip steps; DDA will not issue a contract without RCS certification (where applicable), and HCA will not enroll you without a DDA contract.

• Step 1: Business Formation: Obtain UBI and Master Business License from the WA Department of Revenue (1-4 weeks).
• Step 2: DDA Letter of Intent: Submit a letter of intent and initial application to the regional DDA office (4-8 weeks).
• Step 3: RCS Certification/DOH Licensing: Submit policies and undergo initial evaluation for Supported Living or Home Care Agency licensure (3-6 months).
• Step 4: DDA Contract Execution: Sign the formal contract with DSHS DDA once certification is granted (2-4 weeks).
• Step 5: ProviderOne Enrollment: Submit the Core Provider Agreement and enroll in HCA's ProviderOne system (30-60 days).

10. Common Denials and Survey Findings

DSHS RCS and DDA conduct unannounced surveys and contract evaluations. Failures in background checks and medication management are the most frequent causes for citations, contract holds, or termination.

New providers often struggle with the strict timelines for staff training and certification.

• Background Check Violations: Allowing staff to work before receiving BCCU clearance is a critical violation leading to immediate citations and potential contract termination.
• Incomplete Training: Staff failing to obtain their Home Care Aide (HCA) certification within the 200-day window, rendering them unqualified to provide care.
• Medication Errors: Failure to properly document medication administration on the MAR or failing to follow physician orders.
• PCSP Non-Compliance: Delivering services outside the scope, hours, or locations authorized in the client's Person-Centered Service Plan.
• Financial Mismanagement: Commingling client funds with agency funds or failing to maintain accurate ledgers for client purchases.

11. Key Contacts and Resources

Prospective providers must rely on official Washington State resources to navigate the complex contracting and certification landscape.

Always refer to the current Washington Administrative Code (WAC) and official DSHS/HCA portals for the most up-to-date forms and rate schedules.

• DSHS DDA Provider Information: https://www.dshs.wa.gov/dda/counties-and-providers/developmental-disabilities-administration-counties-provider-information
• DSHS Residential Care Services (RCS): https://www.dshs.wa.gov/altsa/residential-care-services
• HCA ProviderOne Portal: https://www.hca.wa.gov/billers-providers-partners/providerone
• DOH Home Care Agency Licensing: https://doh.wa.gov/licenses-permits-and-certificates/facilities-z/home-care-agencies
• DSHS Background Check Central Unit (BCCU): https://www.dshs.wa.gov/ffa/background-check-central-unit
• Washington State Legislature (WACs): https://app.leg.wa.gov/wac/

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