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K37

Billable

Unspecified appendicitis

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

What This Code Means

Inflammation of the appendix where it cannot be determined whether it is acute or chronic.

Coding Tips

  • •This is a last-resort code; query the provider to clarify if appendicitis is acute (K35.x) or chronic (K36)
  • •Avoid using this code if any clinical documentation suggests acute presentation

Excludes 1 — Do NOT code together

  • unspecified appendicitis with peritonitis (K35.2-, K35.3-)

Code Hierarchy

└K37Unspecified appendicitis
└K37Unspecified appendicitis

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