ICD-10-CM > R00-R99 > R30-R39 > R39 > R39.8 > R39.85 R39.85 Costovertebral (angle) tenderness Non-Billable/Non-Specific Type 2 Excludes abdominal and pelvic pain (R10.-) Codes R39.851Costovertebral (angle) tenderness, right sideR39.852Costovertebral (angle) tenderness, left sideR39.853Costovertebral (angle) tenderness, bilateralR39.859Costovertebral (angle) tenderness, unspecified side