Calcaneal spur, unspecified foot

This code signifies the presence of an abnormal bony protrusion, known as a spur, on the calcaneus (heel bone) when the specific foot affected is not documented. These spurs typically form on the plantar aspect of the heel and can cause pain and inflammation, particularly during weight-bearing activities.

Use this code when documentation confirms a calcaneal spur but does not specify whether it is on the right or left foot. This is appropriate for initial evaluations or when laterality is not explicitly stated in the diagnostic imaging report or physician's notes.

• Avoid using this code if laterality (right or left foot) is clearly documented; instead, select the more specific M77.31 (right) or M77.32 (left).
• Always query the provider for laterality if it's missing to ensure the most specific code is assigned.
• Consider co-reporting with codes for associated conditions like plantar fasciitis (M72.2) if documented, as heel spurs often occur in conjunction with this condition.