2026 ICD-10-CM Diagnosis Code M41.30Thoracogenic scoliosis, site unspecified

ICD-10-CM CodesM00–M99M40-M43M41

ICD-10-CM M41.30
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M41.30 is a billable ICD-10-CM diagnosis code for thoracogenic scoliosis, site unspecified. 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, 551 through 552. Coders also document this condition as acquired kyphoscoliosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Scoliosis and other postural dorsopathic deformities.

Code Identity

ICD-10-CM Code
M41.30
Billable Status
Yes — Valid for Submission
Code Describes
Thoracogenic scoliosis, site unspecified
Short Description
Thoracogenic scoliosis, site unspecified
Same as the full description in the CMS dataset.
Parent Code
Thoracogenic scoliosis

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM40-M43Deforming dorsopathies
CategoryM41Scoliosis
This CodeM41.30Thoracogenic scoliosis, site unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired kyphoscoliosis
  • Thoracogenic kyphoscoliosis
  • Thoracogenic scoliosis

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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

Scoliosis

Scoliosis causes a sideways curve of your backbone, or spine. These curves are often S- or C-shaped. Scoliosis is most common in late childhood and the early teens, when children grow fast. Girls are more likely to have it than boys. It can run in families. Symptoms include leaning to one side and having uneven shoulders and hips.

Read the full article at MedlinePlus

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

Convert M41.30 to ICD-9-CMHistory

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

ICD-9-CM
737.34 Thoracogenic scoliosis
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 M41.30Overview

What is the ICD-10 code for thoracogenic scoliosis, site unspecified?

The ICD-10-CM code for thoracogenic scoliosis, site unspecified is M41.30 (sometimes written as M4130). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is M41.30 (Thoracogenic scoliosis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report thoracogenic scoliosis, site unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M41.30 group to?

When thoracogenic scoliosis, site unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 456, 457, 458, 551, 552, with relative weights from 0.9613 to 8.4034 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M41.30?

Under the General Equivalence Mappings, thoracogenic scoliosis, site unspecified converts to ICD-9-CM 737.34 (thoracogenic scoliosis). The mapping is approximate, so confirm the match fits the documentation.