M87.135
BillableOsteonecrosis due to drugs of left 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 left ulna (forearm bone on the pinky side) caused by medication side effects.
Coding Tips
- •Verify left side is explicitly documented to avoid miscoding the laterality
- •Note the causative drug in the medical record for complete documentation and potential adverse event tracking
Clinical Significance
Drug-induced osteonecrosis of the left ulna represents medication-related bone death affecting the medial aspect of the forearm, with potential impact on both elbow and wrist joint function. The laterality-specific diagnosis is crucial for targeted treatment planning and functional assessment.
Documentation Requirements
- ✓Clear documentation of left ulna involvement in osteonecrosis
- ✓Identification of causative drug or medication class
- ✓Imaging studies demonstrating ulnar bone necrosis
- ✓Clinical presentation including pain, tenderness, and functional limitations
- ✓Assessment of impact on elbow stability and wrist mechanics
- ✓Drug exposure timeline and relationship to symptom onset
- ✓Treatment plan including conservative and surgical options
- ✓Provider assessment establishing drug-induced etiology
Commonly Confused Codes
M87.134 — Right ulna osteonecrosis, opposite sideM87.132 — Left radius osteonecrosis affects different forearm boneM87.136 — Unspecified ulna when left side is clearly documentedM87.235 — Post-traumatic left ulna requires trauma historyM87.035 — Idiopathic osteonecrosis lacks specific drug causation
Code Hierarchy
└M87Osteonecrosis└M87.1Osteonecrosis due to drugs└M87.13Osteonecrosis due to drugs of radius, ulna and carpus└M87.135Osteonecrosis due to drugs of left ulna
└M87.135Osteonecrosis due to drugs of left ulna