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As previously communicated, there was a change to the processing of claim 
service units for professional claims that went into effect November 1, 2013. 
As a result, Medically Unlikely Edits (MUE) are applied to both professional 
and facility claims.
An MUE is assigned to certain HCPCS/CPT? codes identifying the 
maximum units of service a provider performs on a patient on a given date of 
service.
Note: Claim lines with billed units that exceed the Centers for 
Medicare & Medicaid Services (CMS)-published MUE values will be rejected on a 
pre- and/or post-payment basis. 
CMS updates the MUE values on a quarterly basis coincident with each 
quarterly version of MUE. For a complete listing of CMS-published MUE values, 
visit the Medically Unlikely Edits 
section of the CMS website and select the applicable MUE Table under the 
Related Links header at the bottom of the page.
CPT copyright 2016 American Medical Association. All 
rights reserved. CPT is a registered trademark of the American Medical 
Association.
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