Q78.6

Multiple congenital exostoses

Billable code

This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

This code · Q78.6
Synonyms

Diaphyseal aclasis

Inherited from Q78Other osteochondrodysplasias
Excludes 2

congenital myotonic chondrodystrophy (G71.13)

Inherited from chapter 17Congenital malformations, deformations and chromosomal abnormalities
Excludes 2

inborn errors of metabolism (E70-E88)

Official Guidelines for Q78.6

FY 2026 ›
I.C.17Chapter-specific guidanceChapter 17: Congenital malformations, deformations, and chromosomal abnormalities (Q00-QA1)

Sections that reference Q78.6

Sections whose FY 2026 text names Q78.6, its Q78 category, or a range containing it — the chapter guidance above is the authoritative source.

Find Q78.6 in the alphabetic index

4 index paths lead to this code