If you’re receiving denials from Medicare, one possibility is that you’re running up against medically unlikely edits (MUEs). The edits, which are designed to prevent overpayments caused by gross billing errors, usually a result of clerical or billing systems’ mistakes, often confuse even veteran coders.

Ensure you’re not letting MUEs wreak havoc on your urology practice’s coding and reimbursement by uncovering the truth about four aspects of these edits.

While you shouldn’t stress too much, any practice filing a claim with Medicare should know what MUEs are and how they work.

“They limit the frequency a CPT code can be used,” says Chandra L. Hines, business office manager at Capital Urological Associates in Raleigh, N.C. “With our specialty of urology, we need to become aware of the denials and not let every denial go because the insurance company said it was an MUE. We should all be aware of MUEs as they occur, and we cannot always control whether or not we will receive payment.”

The MUE list includes specific CPT or HCPCS codes, followed by the number of units that CMS will pay. CMS developed the MUEs to reduce paid claims error rates in the Medicare Program, says Jillian Harrington, MHA, CPC, CPC-P, CPCI, CCS-P, president of ComplyCode in Binghamton, New York. “The first edits were implemented in January 2007, although the edits themselves became public in October 2008,” she adds.

Some MUEs deal with anatomical impossibilities while others edit automatically the number of units of service you can bill for a service in any 24-hour period. Still others limit codes according to CMS policy. For example, excision of a hydrocele, bilateral (55041) has a bilateral indicator of “2,” so you should never bill two or more units of this code. Additional edits focus on the nature of...