ICD-10 Code L89.304 – Pressure ulcer of unspecified buttock, stage 4 (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L89.304 – Pressure ulcer of unspecified buttock, stage 4
What it is
This code identifies a full-thickness pressure ulcer on the buttock, with stage 4 indicating exposed deeper structures such as muscle, tendon, or bone. Use it when the buttock site is documented but the side is not specified.
Clinical signs
Stage 4 pressure ulcers show extensive tissue loss and may have undermining, tunneling, or exposed deep tissue. Clinical features vary; refer to documentation for laterality and wound depth details.
When to use this code
Use L89.304 when the record clearly documents a pressure ulcer of the buttock at stage 4 and does not specify left or right. Apply it for inpatient, outpatient, or wound care documentation that confirms pressure-related skin breakdown. Check documentation if the site or stage is unclear.
Do not use for
Do not use this code for lower-stage pressure injuries, unstageable ulcers, or ulcers at a different anatomic site. If laterality is documented, choose the more specific buttock code.
Coding tip
Verify both the stage and whether the buttock is unspecified before assigning this code.