![]() ![]() If the TENS unit produces incomplete relief, further evaluation with percutaneous electrical nerve stimulation (PENS) may be indicated. The physician ordering the TENS unit must be the attending physician or a consulting physician for the disease or condition resulting in the need for the TENS unit. The physician's records must document a reevaluation of the member at the end of the trial period, must indicate how often the member used the TENS unit, the typical duration of use each time, and the results. ![]() After this 1-month trial period, continued TENS treatment may be considered medically necessary if the treatment significantly alleviates pain and if the attending physician documents that the patient is likely to derive significant therapeutic benefit from continuous use of the unit over a long period of time. The trial period must be monitored by the physician to determine the effectiveness of the TENS unit in modulating the pain. Note: When TENS is used for acute post-operative or chronic intractable pain, Aetna considers use of the device medically necessary initially for a trial period of at least 1 month but not to exceed 2 months. See 'Experimental and Investigational' section for exclusions.
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