Diabetes mellitus due to underlying condition w foot ulcer

This code signifies a diabetic foot ulcer that is a direct consequence of an underlying medical condition, rather than type 1 or type 2 diabetes. The underlying condition could be cystic fibrosis, pancreatic disease, or other specified endocrine disorders that lead to secondary diabetes. The foot ulcer is a specific complication of this secondary diabetes.

Apply this code when documentation clearly links the patient's diabetes to an underlying non-diabetic condition, and a foot ulcer is present as a complication. This code requires explicit physician documentation of the underlying condition causing the diabetes and the presence of a foot ulcer. It is crucial to differentiate this from foot ulcers in Type 1 or Type 2 diabetes.

• Always sequence the underlying condition (e.g., cystic fibrosis, pancreatitis) first, followed by this code.
• Ensure documentation specifies the type of foot ulcer (e.g., neuropathic, ischemic) if known, using an additional site-specific ulcer code.
• Do not use this code for foot ulcers in patients with Type 1 or Type 2 diabetes; separate codes exist for those scenarios.