HCPCS A4604: Heated PAP Tubing

No. Because they are both types of tubing for a PAP device, they are considered to be for the same function and are often listed as mutually exclusive (not separately payable) on the same date of service or within the same replacement period.

A4604 is typically considered a recurring supply. The usual maximum allowance for replacement is one unit every three months.

The primary clinical benefit is reducing "rainout" (condensation) that forms in the tubing when warm, humidified air cools down. By keeping the air warm, the heated tubing helps reduce nasal dryness, irritation, and congestion, thus improving the patient's comfort and encouraging better adherence to therapy.