As per CPT guidelines:
"The unit of service for codes 88300 through 88309 is the specimen."
As per CPT Assistant Dec 2011:
"In addition, the unit of service for codes 88300-88309 refers to the specimen. Therefore, if the gallbladder material received for pathologic examination comprising multiple specimens for individual and separate attention and individual examination and pathologic diagnosis, each specimen’s gross and microscopic examination performed is considered a single unit of service. The appropriate surgical pathology code should be reported. Codes 88300-88309 do not include the services described by codes 88311-88388."
Therefore no published MUE value for the code 88305 is available. Was there any particular reason for denial?