M86.129
BillableOther acute osteomyelitis, unspecified humerus
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
0.000What This Code Means
A sudden bone infection in the upper arm bone (humerus) where the specific side (left or right) is not specified or documented.
Coding Tips
- •Use this code only when laterality cannot be determined from documentation; query provider if possible for specificity
- •This is a less specific code; attempt to clarify which arm is affected before defaulting to unspecified
Clinical Significance
Acute osteomyelitis of unspecified humerus represents incomplete documentation of a serious bone infection requiring immediate intervention. This diagnosis should prompt queries for laterality to ensure accurate coding and appropriate treatment planning.
Documentation Requirements
- ✓Documentation of humerus involvement without laterality specification
- ✓Clinical evidence of acute bone infection onset
- ✓Imaging confirmation of osteomyelitis in humeral bone
- ✓Laboratory markers of active infection
- ✓Exclusion of hematogenous spread as primary etiology
- ✓Treatment response documentation
- ✓Physician query for laterality when possible
- ✓Causative organism identification if available
Commonly Confused Codes
M86109 — Acute hematogenous osteomyelitis of unspecified humerus (blood-borne)M86629 — Chronic osteomyelitis with draining sinus of unspecified humerusM86229 — Subacute osteomyelitis of unspecified humerusM25519 — Pain in unspecified shoulder (symptom only)M86121/M86122 — Right/left specific codes when laterality is documented