## **What is the HCPCS code E0935 for?**
The HCPCS code E0935 is meant to designate the use of a continuous passive motion device (CPM machine) on a patient's knee.
The purpose of CPM treatment using this device is to help patients who've suffered knee injuries or have undergone knee surgery. The device enables the knee to move continuously through its full range of motion without requiring the patient to use their own muscles or move their affected knee.
By gently moving the knee through its full range of motion, this device can help reduce knee stiffness, recover or improve the joint's mobility and flexibility. Exercising the knee with this device can also help prevent scar tissue from forming in the affected limb.
## **Documentation requirements for E0935**
As with any HCPCS code, sufficient documentation must be provided before submitting claims. Here's what you need:
- The full name of the patient
- The full name of the healthcare professional overseeing the CPM treatment
- The name and address of the facility where the patient took the CPM treatment
- The patient's medical history, especially the diagnosis of whatever knee problem they have, plus the surgery date and type of knee surgery performed
- Imaging test results showing the affected knee's condition
- Date of application of CPM
- Date of discharge from the hospital.
## **Billing requirements for E0935**
Besides the documentation requirements above, here are things you need to take note of:
- You're filing a claim for a rental. The CPM device is only for rent, not purchase.
- You have to indicate each calendar day the CPM device was used, especially dates when it was used in the patient's home.
- The CPM treatment must be applied within 48 hours post-surgery, and coverage only covers 21 days from the date of surgery. Devices not applied within 48 hours post-surgery, or uses of the device beyond the 21-day coverage, or usage after other types of surgery are not covered and will be rejected. However, other private insurance companies may have different policies.
## **Other similar codes**
- **E0936** - Continuous passive motion exercise device for use other than the knee
- **E1811** - Static progressive stretch knee device, extension and/or flexion, with or without range of motion ad
- **E1810** - Dynamic adjustable knee extension / flexion device, includes soft interface material
- **L1812** - Knee orthosis, elastic with joints, prefabricated, off-the-shelf
- **L1830** - Knee orthosis, immobilizer, canvas longitudinal, prefabricated, off-the-shelf
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