Non-prs chr ulc of unsp up arm with bne invl w/o evd of necr

This code signifies a persistent, non-pressure-related open sore on an unspecified upper arm that extends down to the bone. Crucially, there is no dead tissue (necrosis) present within the ulcer. It indicates a deep, chronic wound affecting the skeletal structure of the upper arm, not caused by sustained pressure.

Apply this code when documentation specifies a long-standing ulcer on the upper arm, explicitly stating bone involvement without necrosis. This is appropriate for ulcers resulting from conditions like vascular insufficiency, neuropathy, or trauma, but not decubitus ulcers. Supporting documentation must clearly differentiate from pressure ulcers and confirm the depth to bone.

• Ensure documentation explicitly states "bone involvement" and "without necrosis" for the unspecified upper arm.
• Do not use for pressure ulcers; refer to L89.x codes for those.
• Verify laterality (left/right) if specified in the documentation; this code is for "unspecified."