Is ICD-10-CM code Q78 billable?

No, Q78 (Other osteochondrodysplasias) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code Q78 belong to?

Q78 belongs to Chapter 17 of the ICD-10-CM tabular list: Q00–Q99 (Congenital Malformations, Deformations and Chromosomal Abnormalities).

Q78

Non-Billable

ChapterQ00–Q99

Rankcategory

Description

Other osteochondrodysplasias

About ICD-10-CM code Q78

Q78 is the ICD-10-CM diagnosis code for Other osteochondrodysplasias. It sits in Q00-Q99 Congenital Malformations, Deformations and Chromosomal Abnormalities, within Congenital malformations and deformations of the musculoskeletal system (Q65-Q79). Q78 is not billable on its own, coders must choose one of its more specific child codes instead.

Use a more specific code (9 billable)

Q78.0Osteogenesis imperfecta Q78.1Polyostotic fibrous dysplasia Q78.2Osteopetrosis Q78.3Progressive diaphyseal dysplasia Q78.4Enchondromatosis Q78.5Metaphyseal dysplasia Q78.6Multiple congenital exostoses Q78.8Other specified osteochondrodysplasias Q78.9Osteochondrodysplasia, unspecified

Metadata & Insights

•Non-billable category (requires more specific sub-code).
•Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99).

CH17 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)

inborn errors of metabolism (E70-E88)

Instructional Notes

Excludes2(Not included here. Code separately if applicable.)

congenital myotonic chondrodystrophy (G71.13)

Clinical Hierarchy

BillableHas subcodes

CH17Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

Q65-Q79Congenital malformations and deformations of the musculoskeletal system (Q65-Q79)

Q78Other osteochondrodysplasiasNot billable

Q78.0Osteogenesis imperfectaBillable

Q78.1Polyostotic fibrous dysplasiaBillable

Q78.2OsteopetrosisBillable

Q78.3Progressive diaphyseal dysplasiaBillable

Q78.4EnchondromatosisBillable

Q78.5Metaphyseal dysplasiaBillable

Q78.6Multiple congenital exostosesBillable

Q78.8Other specified osteochondrodysplasiasBillable

Q78.9Osteochondrodysplasia, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to Q78:

chapterCH17

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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