The National Institute for Health and Clinical Excellence (NICE) has issued full guidance to the NHS in England, Wales, Scotland and Northern Ireland on sinus tarsi implant insertion for mobile flatfoot.


Mobile flatfoot is a condition in which the foot becomes flattened when standing. It can occur in children, where it may self-correct, and in adults. It usually results from tendon damage. In most people this is asymptomatic, but in some it may cause pain or other symptoms. This procedure involves surgery to insert an implant just above the heel bone, with the aim of correcting the condition and improving symptoms.

Coding recommendations


SNOMED CT preferred term (concept ID)

Insertion of implant to sinus tarsi (840611000000103)


W81.7 Insertion of therapeutic spacer into joint

Z85.3 Talocalcaneal joint

Diagnosis or health condition

SNOMED CT preferred term (concept ID)

Hypermobile flat foot (203531001)


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