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2025 ICD-10-CM code M86.43

Chronic osteomyelitis with draining sinus of the radius and ulna.

Use additional codes to specify laterality (right or left) and any major osseous defects (M89.7-).

Medical necessity is established by the presence of a chronic bone infection requiring ongoing management to prevent complications. The draining sinus indicates a persistent infection needing intervention.

Diagnosis involves patient history, physical examination, imaging (X-ray, MRI, bone scan), laboratory tests (inflammatory markers like CRP, ESR, WBC, pus culture), and possibly bone biopsy. Treatment includes antibiotics, analgesics, and surgery.

In simple words: Chronic osteomyelitis with a draining sinus in the forearm means a long-lasting bone infection in your forearm bones.It creates a pathway for pus to drain out from inside the bone to the skin.

Chronic osteomyelitis with a draining sinus tract of the radius and ulna refers to a long-standing bone infection characterized by inflammation and the presence of an abnormal passage from a bone abscess to the skin surface, allowing for the drainage of pus. This condition typically affects the radius and ulna, the two bones of the forearm.

Example 1: A patient presents with persistent pain, redness, swelling, and pus drainage in the forearm following a fracture several months prior. Imaging reveals chronic osteomyelitis with a draining sinus tract involving the radius and ulna., A patient with a history of joint replacement surgery in the elbow experiences recurring pain and drainage. Examination and tests confirm chronic osteomyelitis with a sinus tract in the radius and ulna., An individual with a systemic infection develops localized pain and swelling in the forearm.Imaging and laboratory findings show chronic osteomyelitis with a draining sinus affecting the radius and ulna, indicating hematogenous spread of the infection.

Documentation should include evidence of chronic infection, the presence of a draining sinus, imaging findings confirming osteomyelitis, laboratory results, and details of the affected site (radius and ulna).

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