Per policy, separate cushions, backs, headrests, and positioning accessories are not medically necessary when the member has a power-operated vehicle (POV) or a power wheelchair with a captain's chair seat. The policy explicitly lists powered seat cushions (HCPCS E2610), manual wheelchair solid seat insert accessory (HCPCS E0992), and accessories that do not meet specific code criteria or lack DME PDAC verification (HCPCS K0669) as not medically necessary unless an exception is documented. Custom fabrication (E2609/E2617) is allowed only when prefabricated options meet the clinical criteria and there is a comprehensive written evaluation by an independent PT/OT explaining why prefabricated systems are insufficient.

When a power wheelchair base includes a captain's chair seat, separate seat or back cushions, headrests, and other positioning accessories are considered not medically necessary. The policy identifies specific K-codes for bases that do not include a captain's chair model (e.g., K0839, K0840, K0843, K0860–K0864, K0890, K0891) to clarify exceptions; if a captain's chair is present on the base, coverage for separate cushions/accessories is not supported. Additionally, powered seat cushions (HCPCS E2610) are not supported for any indication.

Coverage for wheelchair seating cushions and related HCPCS codes is conditional on the presence of a supporting ICD-10-CM diagnosis from the policy lists. For the majority of seating and positioning HCPCS the required supporting diagnoses are enumerated in the ICD-10 tables (for example, ICD-10 Table 2 supports many positioning codes; ICD-10 Table 5 supports HCPCS E2609). Claims and prior authorization requests should include one of the listed ICD-10-CM codes to demonstrate medical necessity.

For pressure-relief seating HCPCS (E2607, E2608, E2624, E2625), the policy requires that an applicable pressure ulcer diagnosis from the L89 series or the related history code Z87.2 be billed with the HCPCS code. If an applicable L89.* or Z87.2 diagnosis is not submitted with these HCPCS codes, the diagnostic support required by the policy for those codes is not provided and the claim/prior authorization may lack supported medical necessity.

The policy's ICD-10 Table 5 enumerates the diagnoses that support medical necessity for custom fabricated seat cushions (HCPCS E2609). Diagnoses not listed in that table are not identified in this section as supporting medical necessity for E2609; therefore, claims for E2609 must be accompanied by one of the ICD-10-CM codes contained in Table 5 to meet the policy's diagnosis requirement.

This clinical policy provides medical necessity guidance but is not a guarantee of payment. Coverage decisions are subject to the member's coverage documents (e.g., evidence of coverage, certificate of coverage, or contract) and must comply with state and federal requirements. For Medicaid members, applicable state Medicaid provisions take precedence where required.

The policy lists specific HCPCS codes that are categorized as not medically necessary unless an exception is documented: manual wheelchair solid seat insert (E0992), powered wheelchair seat cushion (E2610), and cushions/back accessories that do not meet code criteria or lack PDAC verification (K0669). Claims for these codes are subject to denial unless the documentation demonstrates an applicable exception per the policy.

The following items are specifically identified as not covered in the policy excerpt: powered seat cushions (HCPCS E2610), the manual wheelchair solid seat insert accessory (HCPCS E0992), and accessories that fail to meet specific code criteria or lack written coding verification from PDAC (HCPCS K0669). These items are not medically necessary unless the policy documents a stated exception.

Separate cushions, backs, headrests, and other positioning accessories are considered not medically necessary when the member has a power-operated vehicle (POV) or a power wheelchair equipped with a captain's chair seat. In those cases, coverage for separate cushions/accessories is not supported by this policy.

No additional not-covered DME items are listed in the provided excerpt beyond those explicitly named elsewhere; exclusion of coverage in specific cases is driven by the presence or absence of a supporting ICD-10-CM diagnosis as described in the policy's ICD-10 tables.

Pressure-relief seating HCPCS codes (E2607, E2608, E2624, E2625) billed without an applicable L89.* pressure ulcer diagnosis or the related history code Z87.2 are not supported by the diagnosis-code table in this section and therefore lack the required diagnostic documentation to demonstrate medical necessity.

HCPCS E2609 (custom fabricated seat cushion) requires an associated supported ICD-10-CM diagnosis from the policy's ICD-10 Table 5. If E2609 is billed without one of the diagnoses listed in Table 5, the claim is not supported under this section.

Seating system selection should anticipate current and foreseeable functional changes — for example, progressive neurologic disease or growth in pediatric members — and the evaluator must document these considerations. Evaluators should assess and record bowel/bladder control and any history of skin breakdown because prior pressure ulcers increase future risk. The clinical evaluation must describe methods and frequency of pressure relief and demonstrate that the prescribed seating system maintains or improves pressure-relief measures; when custom fabrication is requested, a comprehensive written evaluation by a licensed/certified PT or OT is required and that evaluator must have no financial relationship with the supplier.