What is the diagnosis code for a patient with a postoperative diagnosis of uterus mass?

The diagnosis code for a postoperative diagnosis of a uterus mass is N85.8, which represents "Other specified noninflammatory disorders of the uterus." This code is used when there are conditions related to the uterus that do not fit into specific inflammatory or neoplastic classifications, allowing for a broader classification of various types of masses or abnormalities that might not require a specific code.

In this scenario, the postoperative diagnosis indicates that the patient had an identified mass, and given that there are specific codes for various types of uterine masses, N85.8 serves to capture those that are not otherwise described under more specific categories, thereby providing precise documentation for surgical and clinical purposes.

For instance, N85.0 refers to morphologically abnormal or otherwise specified findings, N85.4 is designated for "Polyp of the uterus," and N85.6 is for "Endometriosis of the uterus." However, none of these codes specifically apply to a general postoperative diagnosis of a mass unless further specified. Thus, N85.8 is the most appropriate choice as it encompasses a broader array of diagnoses related to uterine masses beyond simple classification.