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H70.10

Billable

Chronic mastoiditis, unspecified ear

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

What This Code Means

A long-lasting infection or inflammation of the mastoid bone (the bone behind the ear) that has persisted over time. The specific ear affected is not documented in the medical record.

Coding Tips

  • •Verify documentation specifies 'chronic' mastoiditis rather than acute; chronic typically means symptoms lasting more than 3 weeks
  • •If the ear side is documented (right, left, or bilateral), use the more specific codes H70.11, H70.12, or H70.13 instead of the unspecified code H70.10

Code Hierarchy

└H70Mastoiditis and related conditions└H70.1Chronic mastoiditis└H70.10Chronic mastoiditis, unspecified ear
└H70.10Chronic mastoiditis, unspecified ear

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