2026 ICD-10-CM Diagnosis Code M43.12Spondylolisthesis, cervical region

ICD-10-CM Codes›M00–M99›M40-M43›M43

ICD-10-CM M43.12
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M43.12 is a billable ICD-10-CM diagnosis code for spondylolisthesis, cervical region. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 551 through 552. Coders also document this condition as acquired spondylolisthesis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Spondylopathies/spondyloarthropathy (including infective).

Code Identity

ICD-10-CM Code
M43.12
Billable Status
Yes — Valid for Submission
Code Describes
Spondylolisthesis, cervical region
Short Description
Spondylolisthesis, cervical region
Same as the full description in the CMS dataset.
Parent Code
M43.1
Spondylolisthesis

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM40-M43Deforming dorsopathies
CategoryM43Other deforming dorsopathies
This CodeM43.12Spondylolisthesis, cervical region

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired spondylolisthesis
  • Acquired spondylolisthesis of cervical vertebra

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.

    • Spondylolisthesis(acquired) (degenerative)
      • cervical region

Clinical ClassificationClinical

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

CCSR MUS011
Spondylopathies/spondyloarthropathy (including infective)
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Spondylolisthesis

    forward displacement of a superior vertebral body over the vertebral body below.

  • Grade 4 Spondylolisthesis|Spondylolisthesis, grade 4

    anterior displacement of a vertebra by greater than 75% of its normal position.

  • Have Joint Problems that Cause Pain, Recent Fracture or Fracture Caused by Osteoporosis or Cancer, Displaced Vertebra and/or Spondylolisthesis/Pars Defect Question|Do you have joint problems causing pain, a recent fracture or fracture caused by osteoporosis or cancer, displaced vertebra (e.g., spondylolisthesis), and/or spondylolysis/pars defect (a crack in the bony ring on the back of the spinal column)|Have Joint Problems that Cause Pain, Recent Fracture or Fracture Caused by Osteoporosis or Cancer, Displaced Vertebra and/or Spondylolisthesis/Pars Defect

    a question about whether an individual has joint problems causing pain, a recent fracture or fracture caused by osteoporosis or cancer, displaced vertebra , and/or spondylolysis/pars defect.

  • Spondylolisthesis

    a condition in which there is forward displacement of a vertebral bone over the on below it.

Patient EducationClinical

Neck Injuries and Disorders

Any part of your neck - muscles, bones, joints, tendons, ligaments, or nerves - can cause neck problems. Neck pain is very common. Pain may also come from your shoulder, jaw, head, or upper arms.

Read the full article at MedlinePlus

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

Convert M43.12 to ICD-9-CMHistory

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

ICD-9-CM
738.4 Acq spondylolisthesis
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 M43.12Overview

Is M43.12 (Spondylolisthesis) a billable code?

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

What MS-DRG does M43.12 group to?

When spondylolisthesis, cervical region is the principal diagnosis on an inpatient stay, it groups to MS-DRG 551, 552, with relative weights from 0.9613 to 1.6761 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M43.12?

Under the General Equivalence Mappings, spondylolisthesis, cervical region converts to ICD-9-CM 738.4 (acq spondylolisthesis). 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.