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Continuous Passive Motion (CPM) Device Date Span Calculator

Enter the date of surgery, onset of use, and discharge date to determine the date span for coverage of Continuous Passive Motion (CPM) devices.

Before use, verify that the medical coverage criteria for DME MAC coverage of CPM devices have been met and ensure that you have accurate information for the fields below.

Use the MM/DD/YYYY format for dates.


CPM devices are covered for patients who have received a total knee replacement. To qualify for coverage, use of the device must commence within 2 days following surgery. In addition, coverage is limited to that portion of the 3-week period following surgery during which the device is used in the patient's home. There is insufficient evidence to justify coverage of these devices for longer periods of time or for other applications (National Coverage Determination (NCD) 280.1External PDF).


Disclaimer: CGS' online tools and calculators are informational and educational tools only, designed to assist suppliers and providers in submitting claims correctly. CGS makes no guarantee that this resource will result in Medicare reimbursement for services provided. Although we've made every reasonable effort to provide effective resources, CGS is not responsible for the consequences of any decisions or actions taken in reliance upon or as a result of the information that these tools provide. CGS is not responsible for any human or mechanical errors or omissions.


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