M87.139

HCC Category Mapping

What This Code Means

Death of bone tissue in the wrist bones (carpus) caused by medication side effects when the specific side is not specified.

Coding Tips

• •Query provider for laterality specification when possible; unspecified codes are less preferred
• •If bilateral involvement exists, code each side separately rather than using the unspecified code

Clinical Significance

Drug-induced osteonecrosis of unspecified carpus represents medication-related wrist bone death when laterality cannot be determined from documentation. This condition still requires comprehensive management despite the side specification limitation, as carpal involvement significantly impacts hand function.

Documentation Requirements

• ✓Documentation confirming carpal bone involvement in osteonecrosis
• ✓Specific causative medication or drug class identification
• ✓Radiological studies supporting carpal osteonecrosis diagnosis
• ✓Clinical presentation including wrist pain and functional deficits
• ✓Rationale for why laterality cannot be determined
• ✓Drug exposure history with temporal correlation to symptoms
• ✓Treatment plan addressing functional limitations
• ✓Provider confirmation of drug-induced etiology

Commonly Confused Codes