M90.549
BillableOsteonecrosis in diseases classified elsewhere, unspecified hand
HCC Category Mapping
V28HCC 92 — Bone/Joint/Muscle Infections/Necrosis
0.209V24HCC 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 hand (side not specified) caused by another disease or condition affecting the body.
Coding Tips
- •Avoid using this code if laterality can be determined; it reduces specificity
- •Clarify with documentation whether right, left, or bilateral involvement exists
Clinical Significance
This diagnosis indicates secondary osteonecrosis affecting an unspecified hand, representing bone death caused by an underlying classified disease condition. The diagnosis significantly impacts risk adjustment calculations and reflects ongoing complex medical management needs with potential functional limitations.
Documentation Requirements
- ✓Clear documentation of underlying disease causing the secondary osteonecrosis
- ✓Clinical evidence of hand involvement without specific laterality documentation
- ✓Radiological confirmation of osteonecrotic changes (MRI, bone scan, CT)
- ✓Provider statement establishing causal relationship to classified disease
- ✓Current management approach for both primary and secondary conditions
- ✓Functional impact assessment on hand use and daily activities
- ✓Documentation excluding primary osteonecrosis or traumatic causes
- ✓Treatment monitoring and response documentation
Commonly Confused Codes
M87.049 — Primary osteonecrosis of unspecified hand, not disease-relatedM90.541 — Same condition but specifically documented as right handM90.542 — Same condition but specifically documented as left handM86.149 — Chronic osteomyelitis of unspecified hand involving infectionM25.549 — Pain in unspecified hand, which is symptomatic rather than structural
Code Hierarchy
└M90Osteopathies in diseases classified elsewhere└M90.5Osteonecrosis in diseases classified elsewhere└M90.54Osteonecrosis in diseases classified elsewhere, hand└M90.549Osteonecrosis in diseases classified elsewhere, unspecified hand
└M90.549Osteonecrosis in diseases classified elsewhere, unspecified hand