Washington - Speech & Language Service — Licensing, Medicaid Enrollment and Startup Requirements

Last reviewed: 2026-08-16

In Washington State, Speech-Language Pathology (SLP) services for communication, cognition, and swallowing are administered under the Apple Health (Medicaid) program. Approved providers deliver medically necessary rehabilitative and habilitative therapies to beneficiaries, governed by the Washington State Health Care Authority (HCA) and licensed by the Department of Health (DOH).

The single biggest structural barrier to entry for a new SLP provider in Washington is the fragmented dual-credentialing mandate. Providers must first secure state licensure and enroll in the state's ProviderOne system to sign a Core Provider Agreement, but because the vast majority of Apple Health clients are enrolled in managed care, providers must subsequently secure network contracts with regional Managed Care Organizations (MCOs). MCO credentialing can take up to 120 days and networks may periodically close to new independent providers, acting as a strict gatekeeper to actual patient volume and reimbursement.

1. Service Definition and Scope

Washington Apple Health defines Speech-Language Pathology services as medically necessary evaluation and therapeutic treatment for speech, language, voice, swallowing (dysphagia), and cognitive-communication disorders. These services fall under the HCA's Outpatient Rehabilitation program.

Services must be rehabilitative (restoring lost function) or habilitative (developing skills never fully acquired) and require a physician or primary care provider's order. Educational, vocational, or recreational services are strictly excluded from Medicaid reimbursement.

• Service Scope: Comprehensive evaluation and treatment of speech, language, swallowing, and cognitive deficits.
• Governing Policy: Washington State Health Care Authority (HCA) Outpatient Rehabilitation Billing Guide.
• Target Population: Apple Health beneficiaries with documented medical necessity for therapy.
• Excluded Services: Academic instruction, vocational training, and maintenance therapy where no functional improvement is expected.
• Telemedicine: Permitted under HCA telehealth policies using appropriate modifiers (e.g., 95 or GT) for synchronous audio-visual delivery.

2. Regulatory and Oversight Agencies

The Washington State Department of Health (DOH) is responsible for the professional licensure and disciplinary oversight of Speech-Language Pathologists. The Board of Hearing and Speech directly manages the rulemaking and credentialing process.

The Washington State Health Care Authority (HCA) administers the Apple Health Medicaid program and manages the ProviderOne enrollment portal. Regional Managed Care Organizations (MCOs) oversee the daily administration, prior authorizations, and claims for the majority of Medicaid enrollees.

• Licensing Authority: Washington State Department of Health (DOH) Board of Hearing and Speech (https://doh.wa.gov/licenses-permits-and-certificates/professions-new-renew-or-update/speech-language-pathologist).
• Medicaid Agency: Washington State Health Care Authority (HCA) (https://www.hca.wa.gov).
• Medicaid Portal: ProviderOne (https://www.waproviderone.org).
• Managed Care Oversight (Example): Molina Healthcare Washington (https://www.molinahealthcare.com/providers/wa/medicaid/home).
• Managed Care Oversight (Example): Community Health Plan of Washington (CHPW) (https://www.chpw.org).

3. Gatekeeping Prerequisites: Who Can Even Apply

Washington does not require a Certificate of Need (CON) or county sponsorship for independent SLP clinics. There are no state-mandated Request for Proposal (RFP) procurement windows to open a private practice.

However, strict structural prerequisites exist for Medicaid participation. An applicant cannot even begin the ProviderOne enrollment process without an active DOH license and a National Provider Identifier (NPI). Furthermore, federal regulation 42 CFR 455.410(b) mandates that providers must enroll in the state's ProviderOne system even if they intend to exclusively bill through an MCO.

• Certificate of Need: None required for independent SLP practices in Washington.
• Licensure Prerequisite: Must hold an active, unrestricted Speech-Language Pathologist license from the WA DOH before applying to Medicaid.
• NPI Requirement: Must obtain a Type 1 (Individual) and/or Type 2 (Organization) National Provider Identifier (NPI) prior to ProviderOne enrollment.
• Federal Mandate: Per 42 CFR 455.410(b), providers must enroll in ProviderOne even if exclusively serving MCO enrollees.
• MCO Network Contracting: While HCA enrollment is open, actual service delivery to most Apple Health clients requires successful credentialing and contracting with regional MCOs, which may have closed networks depending on regional adequacy.

4. Licensure and Certification Requirements

Speech-Language Pathologists in Washington are governed by WAC 246-828. Applicants must demonstrate rigorous academic and clinical preparation to obtain a license from the DOH.

Washington is also a member state of the Audiology and Speech-Language Pathology Interstate Compact (ASLP-IC), which allows eligible licensed SLPs from other member states an alternative method for providing services in Washington.

• Education: Master's or doctorate degree from a program accredited by the Council on Academic Accreditation (CAA).
• Clinical Experience: Completion of a 36-week full-time postgraduate professional work experience (or equivalent part-time).
• Examination: Passing score on the Praxis Examination in Speech-Language Pathology.
• Jurisprudence: Completion of the Washington State jurisprudence examination for hearing and speech professionals.
• ASLP-IC Compact: Washington participates in the ASLP-IC, allowing alternative privilege to practice for out-of-state providers.

5. Medicaid Provider Enrollment

Enrollment in Washington Apple Health is conducted entirely online through the ProviderOne Electronic Certification and Management System (eCAMS). Providers must select the correct enrollment type, typically 'Billing Provider' for solo practices or 'Performing Provider' if joining an existing enrolled group.

All billing providers must sign a Core Provider Agreement (CPA) with the HCA. While institutional providers face an application fee, individual SLP practitioners are generally exempt.

• Enrollment Portal: ProviderOne Electronic Certification and Management System (eCAMS).
• Provider Type: Enroll as a 'Billing Provider' (solo/group) or 'Performing Provider' (under an enrolled group).
• Application Fee: Institutional providers pay a federal fee ($730 in 2025, $750 in 2026); individual SLPs are typically exempt.
• Core Provider Agreement: Mandatory contract with HCA agreeing to accept Medicaid payment as payment in full.
• Tracking: A 14-digit application ID is generated upon starting the application to track status in ProviderOne.

6. Staffing, Training and Background Checks

Washington requires strict background checks for any healthcare provider treating vulnerable populations, including children and elderly Medicaid beneficiaries. This is coordinated through state and federal databases.

Licensed SLPs must also maintain ongoing continuing education to keep their DOH license active, which includes specific state-mandated training topics.

• Background Checks: Washington State Patrol (WSP) and DSHS Background Check Central Unit (BCCU) checks required for providers treating vulnerable populations.
• Continuing Education: DOH requires 30 hours of continuing education every three years.
• Health Equity Training: Must include 2 hours of health equity training per ESSB 5229 requirements.
• SBIRT Training: HCA requires Screening, Brief Intervention, and Referral to Treatment (SBIRT) training for certain billing codes.
• Support Personnel: Speech-Language Pathology Assistants (SLPAs) must be licensed and directly supervised by a fully licensed SLP per WAC 246-828-112.

7. Documentation, Policies and Records

The HCA Outpatient Rehabilitation Billing Guide dictates strict documentation standards for SLP services. Failure to maintain these records can result in claim denials or recoupment during audits.

All therapy must be supported by a detailed Plan of Care (POC) that is regularly updated and signed by the referring provider.

• Medical Necessity: Records must include a physician or primary care provider order/referral for therapy services.
• Evaluation Report: Must document baseline objective measurements, standardized test scores, and a detailed plan of care.
• Plan of Care (POC): Must be updated at least every 90 days and signed by the referring provider.
• Session Notes: Daily treatment notes must include start/stop times, specific interventions, and patient response.
• Record Retention: HCA requires providers to retain all Medicaid client records for a minimum of six years.

8. Billing, Rates and Claims

SLP services are billed using standard CPT codes. Fee-for-service claims are submitted directly to ProviderOne, while managed care claims are submitted to the respective MCO's clearinghouse.

Washington Apple Health imposes annual limits on outpatient rehabilitation services. Providers must request authorization to exceed these limits.

• Billing System: Claims for fee-for-service clients go through ProviderOne; managed care claims go to the respective MCO.
• Common Codes: 92521-92524 for evaluations; 92507 for speech/hearing therapy; 92526 for swallowing dysfunction.
• Prior Authorization: Expedited Prior Authorization (EPA) or Limitation Extensions (LE) required when exceeding annual benefit limits.
• Payment Standard: Providers must accept Apple Health payment as payment in full; balance billing clients is strictly prohibited.
• Fee Schedule: Rates are updated annually and published on the HCA Provider billing guides and fee schedules page.

9. Approval Sequence and Timeline

Becoming a fully billable SLP provider in Washington is a sequential process. You cannot begin Medicaid enrollment without a license, and you cannot begin MCO credentialing without a ProviderOne ID.

The entire process from license application to final MCO contract execution can take up to six months, requiring careful financial planning for new practices.

• Step 1: DOH Licensure (4-8 weeks after submitting transcripts, Praxis scores, and application).
• Step 2: ProviderOne Enrollment (HCA aims for 30 days, but can take 60-90 days if deficiencies exist).
• Step 3: CAQH Profile: Must be fully updated and attested before applying to MCOs.
• Step 4: MCO Credentialing (Takes 90-120 days per plan; requires an active ProviderOne ID).
• Backdating: HCA may allow backdating of the enrollment effective date if applied within specific windows, allowing billing for prior services.

10. Common Denials and Survey Findings

Enrollment applications are frequently delayed due to administrative errors, such as selecting the wrong NPI type or failing to upload the DOH license. HCA will return the application for corrections, resetting the timeline.

During claims processing and post-payment audits, the most common issues revolve around missing signatures or failing to prove medical necessity for ongoing therapy.

• Enrollment Denial: Missing or unattested CAQH profile, which immediately halts MCO credentialing.
• Enrollment Delay: Incorrect NPI type selected in ProviderOne or missing DOH license upload.
• Claim Denial: Exceeding the annual unit limit without an approved Limitation Extension (LE).
• Audit Finding: Missing referring provider signatures on the 90-day Plan of Care updates.
• Audit Finding: Billing for educational/academic support rather than medically necessary rehabilitative therapy.

11. Key Contacts and Resources

Providers should rely on official state portals and billing guides for the most current regulations and fee schedules. The HCA and DOH websites are the primary sources of truth.

For managed care contracting, providers must contact the network management departments of the individual MCOs operating in their region.

• WA DOH Board of Hearing and Speech: https://doh.wa.gov/licenses-permits-and-certificates/professions-new-renew-or-update/speech-language-pathologist
• HCA Provider Enrollment: https://www.hca.wa.gov/billers-providers-partners/become-apple-health-provider/enroll-provider
• ProviderOne Portal: https://www.waproviderone.org
• HCA Outpatient Rehabilitation Billing Guide: https://www.hca.wa.gov/assets/billers-and-providers/op-rehabilitation-bg-20250101.pdf
• Molina Healthcare WA Providers: https://www.molinahealthcare.com/providers/wa/medicaid/home
• Community Health Plan of WA (CHPW): https://www.chpw.org

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