2026 ICD-10-CM Diagnosis Code Q78Other osteochondrodysplasias

ICD-10-CM Codes›Q00-Q99›Q65-Q79›Q78

ICD-10-CM Q78
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q78 is a non-billable ICD-10-CM category code for other osteochondrodysplasias, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Q78.0, Q78.1, Q78.2, and Q78.3.

Code Identity

ICD-10-CM Code
Q78
Billable Status
No — Non-Billable Category
Code Describes
Other osteochondrodysplasias
Chapter
Q65-Q79
Congenital malformations and deformations of the musculoskeletal system

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ65-Q79Congenital malformations and deformations of the musculoskeletal system
CategoryQ78Other osteochondrodysplasias
This CodeQ78Other osteochondrodysplasias

Specific Coding for Other osteochondrodysplasiasOverview

Non-specific codes like Q78 require more characters. Use one of these billable codes instead:

  • Use Q78.0 for Osteogenesis imperfecta

  • Use Q78.1 for Polyostotic fibrous dysplasia

  • Use Q78.2 for Osteopetrosis

  • Use Q78.3 for Progressive diaphyseal dysplasia

  • Use Q78.4 for Enchondromatosis

  • Use Q78.5 for Metaphyseal dysplasia

  • Use Q78.6 for Multiple congenital exostoses

  • Use Q78.8 for Other specified osteochondrodysplasias

  • Use Q78.9 for Osteochondrodysplasia, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 2 Excludes

  • congenital myotonic chondrodystrophy G71.13

Clinical InformationClinical

  • Osteochondrodysplasias

    abnormal development of cartilage and bone.

Patient EducationClinical

Birth Defects

A birth defect is a problem that happens while a baby is developing in the mother's body. Most birth defects happen during the first 3 months of pregnancy. One out of every 33 babies in the United States is born with a birth defect.

The full article covers:

  • What are birth defects?
  • What causes birth defects?
  • Who is at risk of having a baby with birth defects?
  • How are birth defects diagnosed?
  • What are the treatments for birth defects?
  • Can birth defects be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Q78Overview

Is Q78 (Other osteochondrodysplasias) a billable code?

No. This is a category header that groups the codes for other osteochondrodysplasias, and headers cannot be submitted on claims. Claims for other osteochondrodysplasias need a more specific code from this category, such as Q78.0, Q78.1, and Q78.2.