Other bursal cyst, unspecified ankle and foot

This code signifies a fluid-filled sac, distinct from a true bursa, located in the ankle or foot region. These cysts are typically benign and can arise from various causes, including trauma, inflammation, or degenerative changes. They often present as a palpable mass and may or may not be symptomatic.

Apply this code when documentation specifies a bursal cyst of the ankle or foot, but the laterality (right or left) is not recorded. This code is appropriate when the provider's diagnosis explicitly states "bursal cyst" and does not specify a particular type of bursitis or other cyst.

• Ensure the documentation clearly states "bursal cyst" and not a ganglion cyst or synovial cyst, as these have different codes.
• Avoid using this code if laterality is specified; instead, select M71.371 (right) or M71.372 (left).
• Always query the provider for laterality if it's missing to ensure the most specific code is assigned.