M87.133
BillableOsteonecrosis due to drugs of unspecified radius
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 radius (forearm bone) caused by medication side effects when the specific side is not specified.
Coding Tips
- •Use only when laterality cannot be determined from documentation; query provider if possible to obtain specific side
- •This code is less specific and may affect reimbursement; bilateral involvement requires separate codes for each side
Clinical Significance
Drug-induced osteonecrosis of unspecified radius indicates medication-related bone death when laterality cannot be determined from documentation. This diagnosis still carries significant implications for forearm function and requires comprehensive management despite the lack of side specification.
Documentation Requirements
- ✓Clear documentation that radius bone is affected by osteonecrosis
- ✓Specific drug or medication class identified as causative agent
- ✓Imaging evidence supporting osteonecrosis diagnosis
- ✓Clinical presentation including pain and functional limitations
- ✓Documentation explaining why laterality cannot be determined
- ✓Treatment approach regardless of side specification
- ✓Drug exposure history and temporal relationship to symptoms
- ✓Provider statement confirming drug-induced etiology
Commonly Confused Codes
M87.131/M87.132 — Use specific laterality codes when right/left is documentedM87.233 — Post-traumatic unspecified radius requires injury documentationM87.033 — Idiopathic osteonecrosis lacks drug causation requirementM87.136 — Unspecified ulna osteonecrosis affects different forearm boneM87.9 — Completely unspecified osteonecrosis lacks bone and drug specificity
Code Hierarchy
└M87Osteonecrosis└M87.1Osteonecrosis due to drugs└M87.13Osteonecrosis due to drugs of radius, ulna and carpus└M87.133Osteonecrosis due to drugs of unspecified radius
└M87.133Osteonecrosis due to drugs of unspecified radius