ICD-10 Code L89.109 – Pressure ulcer of unspecified part of back, unspecified stage (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L89.109 – Pressure ulcer of unspecified part of back, unspecified stage
What it is
This code identifies a pressure ulcer located on an unspecified part of the back when the stage is not documented. Use it when the record confirms a pressure injury on the back but does not specify the exact site or depth.
Clinical signs
Clinical features vary; refer to documentation. Pressure ulcers may show localized skin breakdown, discoloration, open sore, or tissue loss over a pressure-prone area of the back.
When to use this code
Use L89.109 when the provider documents a pressure ulcer of the back but does not identify the exact back location or stage. It is also appropriate when the site is described only as “back” and staging is missing or unclear. Check documentation if another pressure injury type is mentioned.
Do not use for
Do not use this code for pressure injuries with a documented stage, since a more specific code may apply. It is also wrong for non-pressure wounds, skin tears, or ulcers at a different anatomic site.
Coding tip
Query for the exact back location and ulcer stage whenever the note lacks either detail.