M87.134
BillableOsteonecrosis due to drugs of right ulna
HCC Category Mapping
V24HCC 39 — Bone/Joint/Muscle Infections/Necrosis
0.482ESRDHCC 39 — Bone/Joint/Muscle Infections/Necrosis
0.000RxHCCHCC 80 — Bone/Joint/Muscle Infections/Necrosis
0.000What This Code Means
Death of bone tissue in the right ulna (forearm bone on the pinky side) caused by medication side effects.
Coding Tips
- •Distinguish between radius and ulna carefully; both are forearm bones but in different locations
- •Confirm right side documentation and the causative medication in the medical record
Clinical Significance
Drug-induced osteonecrosis of the right ulna affects the medial forearm bone, potentially compromising elbow stability and wrist function. This condition requires careful monitoring as ulnar involvement can impact both proximal and distal joint mechanics in the affected extremity.
Documentation Requirements
- ✓Specific identification of right ulna as the affected bone
- ✓Causative medication documentation with exposure details
- ✓Radiologic evidence of ulnar osteonecrosis (MRI, CT, or bone scan)
- ✓Clinical symptoms including localized pain and functional deficits
- ✓Assessment of elbow and wrist joint function
- ✓Drug therapy duration and dosage when available
- ✓Current management plan and treatment response
- ✓Provider documentation linking medication use to osteonecrosis
Commonly Confused Codes
M87.131 — Right radius osteonecrosis affects different forearm boneM87.136 — Use when ulna laterality is not specifiedM87.234 — Post-traumatic right ulna requires injury history documentationM87.034 — Idiopathic osteonecrosis lacks drug causationM87.135 — Left ulna osteonecrosis, opposite laterality
Code Hierarchy
└M87Osteonecrosis└M87.1Osteonecrosis due to drugs└M87.13Osteonecrosis due to drugs of radius, ulna and carpus└M87.134Osteonecrosis due to drugs of right ulna
└M87.134Osteonecrosis due to drugs of right ulna