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K09.1

Billable

Developmental (nonodontogenic) cysts of oral region

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

What This Code Means

Fluid-filled sacs in the mouth or jaw that develop from non-tooth tissues, such as remnants of embryonic structures.

Coding Tips

  • Differentiate from odontogenic cysts (K09.0) by confirming the cyst does not originate from tooth-forming tissues
  • Document the specific type if known (e.g., nasopalatine duct cyst, median palatal cyst)

Code Hierarchy

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