Ainhum

This code represents Ainhum, a rare, progressive constrictive band formation that typically affects the fifth toe, leading to spontaneous autoamputation. It is characterized by a fibrous ring that gradually tightens around the digit, causing pain, swelling, and eventual separation.

Use this code for documented cases of Ainhum, a specific form of dactylolysis spontanea. This diagnosis is typically supported by clinical examination showing the characteristic constrictive band and progressive autoamputation of a digit, most commonly the little toe.

• Ensure documentation clearly specifies Ainhum and not other forms of dactylolysis or constrictive bands.
• Do not confuse with congenital constriction bands (Q82.8) or acquired constrictive bands from external causes.
• Code any associated complications, such as infection or pain, separately if documented.