Skip to content
Dx

ICD-10-CM 2027 diagnosis code

M41.124Adolescent idiopathic scoliosis, thoracic region

✓ Billable / specific

M41.124 is a valid, billable ICD-10-CM code for adolescent idiopathic scoliosis, thoracic region. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 M41.124

M41.124 is the ICD-10-CM diagnosis code for adolescent idiopathic scoliosis, thoracic region. It belongs to category M41 (scoliosis), block M40-M43 (deforming dorsopathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within M41.12 (adolescent idiopathic scoliosis), M41.124 is specifically for adolescent idiopathic scoliosis, thoracic region. Related codes cover cervical region (M41.122), cervicothoracic region (M41.123), thoracolumbar region (M41.125), lumbar region (M41.126), lumbosacral region (M41.127) and site unspecified (M41.129).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 456 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with MCC, relative weight 7.6244), DRG 457 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with CC, relative weight 5.3668), DRG 458 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection without CC/MCC, relative weight 4.0388), DRG 551 (Medical Back Problems with MCC, relative weight 1.6358) and DRG 552 (Medical Back Problems without MCC, relative weight 0.9584), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

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

Before ICD-10, this condition was coded in ICD-9-CM as 737.30 (scoliosis [and kyphoscoliosis], idiopathic).

Notes that apply from higher levels

Instructions written at a parent level also apply to M41.124.

› From M41 Scoliosis
Includes
  • kyphoscoliosis
Excludes1
  • congenital scoliosis NOS (Q67.5)
  • congenital scoliosis due to bony malformation (Q76.3)
  • postural congenital scoliosis (Q67.5)
  • kyphoscoliotic heart disease (I27.1)
Excludes2
  • postprocedural scoliosis (M96.89)
  • postradiation scoliosis (M96.5)

Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to M41.124.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 08 · Diseases and Disorders of the Musculoskeletal System and Connective Tissue

ICD-9-CM equivalent

Converter →
  • 737.30Scoliosis [and kyphoscoliosis], idiopathicapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about M41.124

Is M41.124 billable?

Yes. M41.124 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can M41.124 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict M41.124 as a principal diagnosis.

Is M41.124 a CC or MCC?

No. M41.124 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does M41.124 group to?

M41.124 is used in the MS-DRG v44.0 logic for MS-DRG 456 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with MCC), MS-DRG 457 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with CC), MS-DRG 458 (Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection without CC/MCC), MS-DRG 551 (Medical Back Problems with MCC) and MS-DRG 552 (Medical Back Problems without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for M41.124?

The CMS General Equivalence Mappings map M41.124 to ICD-9-CM 737.30.