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H70.13

Billable

Chronic mastoiditis, bilateral

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

What This Code Means

A long-standing infection and inflammation of the mastoid bone affecting both ears simultaneously.

Coding Tips

  • •This code indicates bilateral involvement; ensure documentation confirms mastoiditis in both ears
  • •Bilateral chronic mastoiditis is less common and may warrant investigation into underlying causes

Code Hierarchy

└H70Mastoiditis and related conditions└H70.1Chronic mastoiditis└H70.13Chronic mastoiditis, bilateral
└H70.13Chronic mastoiditis, bilateral

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