Washington - Medical Supply Service — Licensing, Medicaid Enrollment and Startup Requirements

Last reviewed: 2026-09-10

The Washington State Health Care Authority (HCA) and the Department of Social and Health Services (DSHS) authorize Medical Supply Services, formally categorized as Specialized Medical Equipment and Supplies, through waivers such as the Community Options Program Entry System (COPES) and Developmental Disabilities Administration (DDA) waivers. Providers must secure active Medicare Durable Medical Equipment, Prosthetics, Orthotics, and Supplies (DMEPOS) enrollment before the HCA will process a Medicaid billing provider application through the ProviderOne system.

Washington does not issue a distinct state-level healthcare facility license for standalone medical supply companies, relying instead on federal Medicare accreditation standards and standard state business licensing through the Department of Revenue. Approval requires executing a Core Provider Agreement with the HCA and maintaining compliance with the specific waiver appendices governing the client's authorized care plan.

1. Service Definition and Scope

In Washington, Medical Supply Services encompass durable medical equipment (DME) and disposable supplies furnished, fitted, and serviced for waiver participants when not covered by the Medicaid State Plan. These items must be necessary to address the participant's functional limitations, promote independence, or ensure health and safety in the community.

The service includes the purchase, rental, custom fitting, maintenance, and repair of equipment. It is funded through DSHS Aging and Long-Term Support Administration (ALTSA) waivers like COPES and New Freedom, as well as DDA waivers including Basic Plus and Core.

• Service Name: Specialized Medical Equipment and Supplies
• Covered Items: Wheelchairs, transfer lifts, specialized positioning devices, and incontinence supplies not covered by the State Plan
• Excluded Items: Experimental equipment, items solely for recreational use, and supplies already covered under the Medicaid State Plan
• Authorization Requirement: All waiver supplies require prior authorization from the DSHS case manager or DDA resource manager
• Delivery Scope: Includes delivery, setup, and basic instruction on equipment use for the client and caregivers

2. Regulatory and Oversight Agencies

The Washington State Health Care Authority (HCA) serves as the single state Medicaid agency, managing provider enrollment and the ProviderOne billing system. The Department of Social and Health Services (DSHS) administers the HCBS waivers through its specialized administrations.

Federal oversight for the prerequisite DMEPOS enrollment is managed by the Centers for Medicare & Medicaid Services (CMS) through the Provider Enrollment, Chain, and Ownership System (PECOS).

• Washington State Health Care Authority (HCA): Manages Medicaid provider enrollment and the Core Provider Agreement (https://www.hca.wa.gov)
• DSHS Aging and Long-Term Support Administration (ALTSA): Administers COPES and New Freedom waivers (https://www.dshs.wa.gov/altsa)
• DSHS Developmental Disabilities Administration (DDA): Administers Basic Plus, Core, and Community Protection waivers (https://www.dshs.wa.gov/dda)
• ProviderOne: The official Washington Medicaid MMIS and enrollment portal (https://www.waproviderone.org)
• Washington State Department of Revenue (DOR): Issues the required state Master Business License (https://dor.wa.gov)

3. Gatekeeping Prerequisites: Who Can Even Apply

Washington requires medical supply providers to establish their credentials at the federal level before seeking Medicaid enrollment. The state does not operate a closed network or require a Certificate of Need for DMEPOS, but the federal prerequisite acts as a strict structural gate.

Applicants must hold an active Medicare DMEPOS supplier number. This requires undergoing a rigorous accreditation process by a CMS-approved accrediting organization and securing a surety bond.

• Medicare Enrollment: Must be actively enrolled in Medicare PECOS as a DMEPOS supplier (Provider Type 51) prior to HCA application
• CMS Accreditation: Must hold current accreditation from a recognized body such as ACHC, BOC, or CARF
• Surety Bond: Must maintain a $50,000 surety bond as required by CMS for Medicare DMEPOS enrollment
• Physical Location: Must maintain a physical facility accessible to the public during standard business hours, per CMS supplier standards
• NPI Requirement: Must possess an active Type 2 National Provider Identifier (NPI) specific to the DMEPOS location

4. Licensure and Certification Requirements

Because Washington does not have a specific Department of Health license for general medical supply companies, providers operate under standard business licensure. However, if the provider dispenses medical oxygen or prescription-based supplies, specialized pharmacy credentials apply.

All providers must register with the Washington State Department of Revenue to obtain a Unified Business Identifier (UBI) and a Master Business License.

• State Business License: Required from the Washington Department of Revenue, establishing the UBI number
• Pharmacy Quality Assurance Commission (PQAC): License required only if dispensing legend drugs, medical oxygen, or operating as a pharmacy
• Local Licensing: Must hold applicable city or county business licenses for the physical storefront location
• Liability Insurance: Must maintain comprehensive general liability insurance as mandated by the HCA Core Provider Agreement
• Out-of-State Providers: Must hold equivalent licensure in their home state and register as a foreign entity doing business in Washington if shipping to WA clients

5. Medicaid Provider Enrollment

Enrollment is conducted entirely online through the ProviderOne portal. Medical supply companies enroll as a Billing Provider using the specific taxonomy codes associated with DME and medical supplies.

Providers must sign the HCA Core Provider Agreement and submit proof of their Medicare enrollment. The HCA waives the Medicaid application fee if the provider has already paid the federal fee to Medicare.

• Enrollment Portal: Applications must be submitted via ProviderOne (https://www.waproviderone.org)
• Provider Type: Must select Billing Provider during the ProviderOne application process
• Core Provider Agreement: Mandatory contract establishing the legal terms of Medicaid participation in Washington
• Application Fee: The $709 fee (2024 rate) is typically waived if the provider supplies proof of payment to Medicare
• Taxonomy Code: Must enroll with the primary taxonomy 332B00000X (Durable Medical Equipment & Medical Supplies)

6. Staffing, Training and Background Checks

While medical supply companies do not provide direct hands-on personal care, staff who interact with vulnerable adults or deliver equipment to client homes must meet state background check requirements.

Technicians fitting specialized equipment (e.g., custom wheelchairs) must hold appropriate professional certifications, such as Assistive Technology Professional (ATP) credentials, depending on the equipment type.

• Background Checks: Required for staff entering client homes, processed through the DSHS Background Check Central Unit (BCCU)
• Exclusion Checks: Must verify all staff monthly against the federal OIG LEIE and Washington State Medicaid exclusion lists
• ATP Certification: Required for staff evaluating and fitting complex rehabilitation technology (CRT)
• Delivery Staff Training: Must be trained on basic equipment setup, safety checks, and client instruction protocols
• Mandatory Reporting: All staff must be trained on Washington's requirements for reporting abuse, neglect, and exploitation of vulnerable adults

7. Documentation, Policies and Records

The HCA and DSHS require strict documentation to substantiate claims. Providers must maintain records of prior authorizations, delivery receipts, and manufacturer warranties.

Records must be retained for a minimum of six years and be readily available for audit by the HCA Office of Program Integrity or DSHS.

• Record Retention: All client and billing records must be kept for 6 years from the date of service
• Proof of Delivery: Must maintain signed and dated delivery tickets confirming the client or caregiver received the item
• Prior Authorization Records: Must keep copies of the DSHS/DDA authorization forms matching the billed dates and codes
• Warranty Logs: Must track manufacturer warranties to ensure Medicaid is not billed for covered repairs
• Prescription Records: Must maintain the original prescribing provider's order for the equipment or supplies

8. Billing, Rates and Claims

Claims are submitted electronically through ProviderOne using standard HIPAA 837P formats or direct data entry. Billing relies on standard HCPCS codes and modifiers.

Reimbursement rates are established by the HCA and published in the Medical Equipment and Supplies Fee Schedule. For items without a set fee, reimbursement is typically based on a percentage of the manufacturer's suggested retail price (MSRP) or invoice cost.

• Billing System: All claims are processed through ProviderOne
• Coding System: Uses standard HCPCS Level II codes (e.g., E-codes for DME, A-codes for supplies)
• Fee Schedule: Rates are published on the HCA Billers and Providers webpage under the DME fee schedule
• By-Report Billing: Items lacking a set rate require submission of the manufacturer invoice for manual pricing
• Payer of Last Resort: Providers must bill Medicare or private insurance before billing Washington Apple Health

9. Approval Sequence and Timeline

The approval process is sequential, heavily front-loaded by the federal Medicare enrollment requirement. Providers cannot begin the Washington Medicaid application until the federal steps are complete.

Once the ProviderOne application is submitted, the HCA typically processes clean applications within 30 to 60 days, provided all Medicare verifications match.

• Step 1: Obtain Washington State Master Business License from DOR (1-2 weeks)
• Step 2: Secure CMS-approved accreditation and surety bond (3-6 months)
• Step 3: Complete Medicare PECOS enrollment for DMEPOS (60-90 days)
• Step 4: Submit ProviderOne Billing Provider application to HCA (30-60 days for HCA review)
• Step 5: Receive HCA welcome letter and active ProviderOne ID to begin accepting DSHS authorizations

10. Common Denials and Survey Findings

Enrollment applications are frequently delayed or denied due to data mismatches between the provider's federal records and the state application. The HCA requires exact alignment of legal names and addresses.

During post-payment audits, the HCA Office of Program Integrity commonly recoups funds for missing proof of delivery or billing for items prior to the official authorization date.

• Data Mismatch: Denials occur when the legal name or address in ProviderOne does not exactly match the IRS W-9 or PECOS record
• Inactive Medicare Status: Applications rejected if the Medicare DMEPOS enrollment is pending or revoked
• Missing Delivery Proof: Audit recoupments frequently result from unsigned or undated delivery tickets
• Authorization Discrepancies: Claims denied when billed dates precede the DSHS case manager's authorization date
• Taxonomy Errors: Delays caused by selecting an incorrect taxonomy code during the ProviderOne enrollment

11. Key Contacts and Resources

Providers should utilize the HCA's dedicated provider support channels for enrollment issues and consult DSHS for waiver-specific authorization questions.

The ProviderOne portal serves as the central hub for both enrollment maintenance and billing resources.

• HCA Provider Enrollment: Manages ProviderOne applications (https://www.hca.wa.gov/billers-providers-partners/become-apple-health-provider/enroll-provider)
• ProviderOne Portal: System for enrollment and claims (https://www.waproviderone.org)
• DSHS ALTSA: Information on COPES and New Freedom waivers (https://www.dshs.wa.gov/altsa)
• DSHS DDA: Information on developmental disability waivers (https://www.dshs.wa.gov/dda)
• Washington Department of Revenue: For Master Business License inquiries (https://dor.wa.gov)

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