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H70.013

Billable

Subperiosteal abscess of mastoid, bilateral

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

What This Code Means

A collection of pus that has formed under the membrane covering the mastoid bone (the bone behind the ear) on both sides of the head. This is a serious infection that requires prompt medical attention.

Coding Tips

  • •Verify documentation confirms bilateral involvement (both ears) before assigning this code; unilateral cases require different codes (H70.011 or H70.012)
  • •This code indicates a complication of mastoiditis, so ensure the underlying mastoid infection is also documented and coded appropriately

Code Hierarchy

└H70Mastoiditis and related conditions└H70.0Acute mastoiditis└H70.01Subperiosteal abscess of mastoid└H70.013Subperiosteal abscess of mastoid, bilateral
└H70.013Subperiosteal abscess of mastoid, bilateral

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