HCPCS Level II code E1615 describes a deionizer water purification system used for hemodialysis; the service is supply/equipment for water treatment in dialysis units and is typically provided in outpatient dialysis centers or hospital-based dialysis units where purified water is required for safe dialysis treatment.

For related coverage guidance, see recent payer policy updates: Prior Authorization for Durable Medical Equipment (DME), Continuous Passive Motion (CPM) Devices, Push-Rim Activated Power-Assist Device (E0986) — Manual Wheelchair Accessory.