HCPCS Code E0935: Continuous Passive Motion Exercise Device for Use on Knee Only

Learn about the HCPCS code E0935 for a continuous passive motion exercise device for use on the knee only through this short guide.

Use Code

Frequently asked questions

A CPM session typically lasts 1 to 2 hours, depending on the patient’s pain tolerance and the healthcare provider’s discretion. A common protocol is 2 hours per session, repeated 3–4 times a day, totaling 6–8 hours daily.

Patients may feel mild discomfort in the knee as the device moves the joint. Skin irritation can also occur, depending on the patient’s skin sensitivity.

The primary benefit—maintaining joint motion—occurs immediately during treatment sessions. While long-term outcomes, such as improved recovery, are observed months later, CPM use is typically limited to approximately 3 weeks.