The ICD-10-CM is a catalog of diagnosis codes used by medical professionals for medical coding and reporting in health care settings. The Centers for Medicare and Medicaid Services (CMS) maintain the catalog in the U.S. releasing yearly updates.
The CPT codes used for screening mammography:
Z12.31, Encounter for screening mammogram for malignant neoplasm of breast, is the primary diagnosis code assigned for a screening mammogram. If the mammogram is diagnostic, the ICD-10-CM code assigned is the reason the diagnostic mammogram was performed.
Code 76641 describes a complete examination of all four quadrants of the breast and the retroareolar region; 76642 describes a limited breast ultrasound (e.g., a focused examination limited to one or more elements of 76641 , but not all four).
Code 76642 is reimbursed at 150 percent of fee schedule value for Medicare payers. Example 3: Complete ultrasound exam of left breast, with ultrasound exam of two quadrants of the right breast: Report 76642-LT (complete exam of left breast) and 76641-RT (limited exam of right breast). Standard reimbursement applies.