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Q78.6

Billable

Multiple congenital exostoses

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

What This Code Means

A genetic condition where multiple benign bone tumors (exostoses) develop on the surface of bones, causing deformities, limb length differences, and potential complications.

Coding Tips

  • •Document the number and location of exostoses; monitor for malignant transformation to osteosarcoma
  • •Code any functional limitations, nerve/vessel compression, or malignant transformation separately

Code Hierarchy

└Q78Other osteochondrodysplasias└Q78.6Multiple congenital exostoses
└Q78.6Multiple congenital exostoses

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