ICD-10 Code E09.621 – Drug or chemical induced diabetes mellitus with foot ulcer (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E09.621 – Drug or chemical induced diabetes mellitus with foot ulcer
What it is
This code identifies diabetes caused by a drug or chemical, along with a foot ulcer. Use it when the ulcer is documented as part of the diabetes complication and not from another primary cause.
Clinical signs
Typical findings include a diabetic foot ulcer, often with skin breakdown on the foot and impaired healing. Clinical features vary; refer to documentation for the drug-related diabetes diagnosis and ulcer location.
When to use this code
Use E09.621 when the record clearly links the patient’s diabetes to a medication or chemical exposure and documents a foot ulcer. You should code it when the provider identifies both conditions in the same encounter.
If the chart only states diabetes with an ulcer but does not specify drug or chemical cause, check documentation before assigning this code. The ulcer must be on the foot, not another body site.
Do not use for
Do not use this code for diabetes of other causes, such as type 1 or type 2, or for a non-foot ulcer. Check documentation if the cause of diabetes or ulcer site is unclear.
Coding tip
Confirm both the drug-induced diabetes etiology and the foot ulcer site in the provider note before coding.