Non-prs chr ulcer of buttock with bone invl w/o evd of necr

This code signifies a long-standing ulceration on the buttock that is not caused by pressure and has progressed to involve the underlying bone. Importantly, there is no documented tissue death or necrosis associated with this specific ulcer. It represents a severe stage of chronic ulceration.

Apply this code when documentation clearly states a chronic, non-pressure ulcer located on the buttock with confirmed bone involvement, such as osteomyelitis. Ensure the physician explicitly rules out pressure as the etiology and confirms the absence of necrotic tissue. This code is appropriate for ulcers resulting from conditions like peripheral vascular disease, diabetes, or venous insufficiency, but not decubitus ulcers.

• Always verify the ulcer's etiology (non-pressure) and anatomical site (buttock) from the physician's notes.
• Confirm explicit documentation of bone involvement (e.g., "osteomyelitis of the ischium secondary to ulcer") and the absence of necrosis.
• Do not use this code for pressure ulcers; refer to the L89 category for those conditions.