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M21.40

Billable

Flat foot [pes planus] (acquired), unspecified foot

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

A flattening of the arch of the foot that develops over time, causing the entire sole to contact the ground when standing or walking.

Coding Tips

  • •Distinguish between acquired flat foot and congenital pes planus; this code is for acquired cases only
  • •Document whether the condition is symptomatic and if it affects function, as this impacts treatment decisions

Code Hierarchy

└M21Other acquired deformities of limbs└M21.4Flat foot [pes planus] (acquired)└M21.40Flat foot [pes planus] (acquired), unspecified foot
└M21.40Flat foot [pes planus] (acquired), unspecified foot

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