ICD-10-CM 2027 diagnosis code
M43.8X3Other specified deforming dorsopathies, cervicothoracic region
M43.8X3 is a valid, billable ICD-10-CM code for other specified deforming dorsopathies, cervicothoracic region. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Oth deforming dorsopathies, cervicothoracic region
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 M43.8X3
M43.8X3 is the ICD-10-CM diagnosis code for other specified deforming dorsopathies, cervicothoracic region. It belongs to category M43 (other deforming dorsopathies), 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 M43.8X (other specified deforming dorsopathies), M43.8X3 is specifically for other specified deforming dorsopathies, cervicothoracic region. Related codes cover occipito-atlanto-axial region (M43.8X1), cervical region (M43.8X2), thoracic region (M43.8X4), thoracolumbar region (M43.8X5), lumbar region (M43.8X6), lumbosacral region (M43.8X7), sacral and sacrococcygeal region (M43.8X8) and site unspecified (M43.8X9).
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 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 737.8 (other curvatures of spine) and 737.9 (unspecified curvature of spine).
Notes that apply from higher levels
Instructions written at a parent level also apply to M43.8X3.
› From M43 Other deforming dorsopathies
- congenital spondylolysis and spondylolisthesis (Q76.2)
- hemivertebra (Q76.3-Q76.4)
- Klippel-Feil syndrome (Q76.1)
- lumbarization and sacralization (Q76.4)
- platyspondylisis (Q76.4)
- spina bifida occulta (Q76.0)
- spinal curvature in osteoporosis (M80.-)
- spinal curvature in Paget's disease of bone [osteitis deformans] (M88.-)
Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.
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 →From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about M43.8X3
Is M43.8X3 billable?
- Yes. M43.8X3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M43.8X3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M43.8X3 as a principal diagnosis.
Is M43.8X3 a CC or MCC?
- No. M43.8X3 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does M43.8X3 group to?
- M43.8X3 is used in the MS-DRG v44.0 logic for 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 M43.8X3?
- The CMS General Equivalence Mappings map M43.8X3 to ICD-9-CM 737.8 and 737.9.