ICD-10-CM > C00-D49 > D37-D48 > D48 > D48.6 D48.6 Neoplasm of uncertain behavior of breast Non-Billable/Non-Specific Applicable To Neoplasm of uncertain behavior of connective tissue of breastCystosarcoma phyllodes Type 1 Excludes neoplasm of uncertain behavior of skin of breast (D48.5) Codes D48.60Neoplasm of uncertain behavior of unspecified breastD48.61Neoplasm of uncertain behavior of right breastD48.62Neoplasm of uncertain behavior of left breast