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K13.5

Billable

Oral submucous fibrosis

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

What This Code Means

A progressive condition where the tissue under the mouth becomes stiff and fibrous, limiting mouth opening and jaw movement, often related to betel nut chewing.

Coding Tips

  • •Document the degree of mouth opening limitation and functional impact on eating or speech
  • •Note any associated habits like betel nut, areca nut, or tobacco use

Code Hierarchy

└K13Other diseases of lip and oral mucosa└K13.5Oral submucous fibrosis
└K13.5Oral submucous fibrosis

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