ICD-10-CM 2027 diagnosis code

Q78Other osteochondrodysplasias

Not billable — use a more specific code

Q78 is a header code, so it can't be reported by itself. Choose one of the 9 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Q78

Q78 is the ICD-10-CM diagnosis code for other osteochondrodysplasias. It belongs to block Q65-Q79 (congenital malformations and deformations of the musculoskeletal system) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is a header code, so it can't be reported by itself; one of its 9 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: Q78.0 (imperfecta), Q78.1 (dysplasia), Q78.2 (Osteopetrosis), Q78.3 (dysplasia), Q78.4 (Enchondromatosis), Q78.5 (dysplasia), Q78.6 (exostoses), Q78.8 (osteochondrodysplasias) and 1 more.

The conditions in its Excludes2 note aren't part of Q78, but may be coded alongside it if the patient has both: congenital myotonic chondrodystrophy (G71.13).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under Q78

Coding notes

Excludes2Not included here — may be reported together if both conditions exist

congenital myotonic chondrodystrophy (G71.13)

Notes that apply from higher levels

Instructions written at a parent level also apply to Q78.

Broader instructions also apply from Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders.

Code history

2016
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2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about Q78

Is Q78 billable?: No. Q78 is a header code. Report one of its more specific subcodes instead.