2026 ICD-10-CM Diagnosis Code M42.04Juvenile osteochondrosis of spine, thoracic region

ICD-10-CM Codes›M00–M99›M40-M43›M42

ICD-10-CM M42.04
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M42.04 is a billable ICD-10-CM diagnosis code for juvenile osteochondrosis of spine, thoracic region. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 456 through 458, 553 through 554. Coders also document this condition as juvenile osteochondrosis of spine. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Scoliosis and other postural dorsopathic deformities.

Code Identity

ICD-10-CM Code
M42.04
Billable Status
Yes — Valid for Submission
Code Describes
Juvenile osteochondrosis of spine, thoracic region
Short Description
Juvenile osteochondrosis of spine, thoracic region
Same as the full description in the CMS dataset.
Parent Code
M42.0
Juvenile osteochondrosis of spine

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM40-M43Deforming dorsopathies
CategoryM42Spinal osteochondrosis
This CodeM42.04Juvenile osteochondrosis of spine, thoracic region

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Juvenile osteochondrosis of spine
  • Juvenile osteochondrosis of thoracic spine

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Osteochondrosis
      • juvenile, juvenilis
        • spine
          • thoracic region

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MUS022
Scoliosis and other postural dorsopathic deformities
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Spine Injuries and Disorders

Your backbone, or spine, is made up of 26 bone discs called vertebrae. The vertebrae protect your spinal cord and allow you to stand and bend. A number of problems can change the structure of the spine or damage the vertebrae and surrounding tissue. They include:

Read the full article at MedlinePlus

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

Convert M42.04 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
732.0 Juv osteochondros spine
Approximate The match is approximate rather than exact.

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 M42.04Overview

Is M42.04 (Juvenile osteochondrosis of spine) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report juvenile osteochondrosis of spine, thoracic region on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M42.04 group to?

When juvenile osteochondrosis of spine, thoracic region is the principal diagnosis on an inpatient stay, it groups to MS-DRG 456, 457, 458, 553, 554, with relative weights from 0.8301 to 8.4034 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M42.04?

Under the General Equivalence Mappings, juvenile osteochondrosis of spine, thoracic region converts to ICD-9-CM 732.0 (juv osteochondros spine). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.