2026 ICD-10-CM Diagnosis Code M43.07Spondylolysis, lumbosacral region

ICD-10-CM Codes›M00–M99›M40-M43›M43

ICD-10-CM M43.07
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M43.07 is a billable ICD-10-CM diagnosis code for spondylolysis, lumbosacral 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 spondylolysis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Spondylopathies/spondyloarthropathy (including infective).

Code Identity

ICD-10-CM Code
M43.07
Billable Status
Yes — Valid for Submission
Code Describes
Spondylolysis, lumbosacral region
Short Description
Spondylolysis, lumbosacral region
Same as the full description in the CMS dataset.
Parent Code
M43.0
Spondylolysis

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM40-M43Deforming dorsopathies
CategoryM43Other deforming dorsopathies
This CodeM43.07Spondylolysis, lumbosacral region

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired spondylolysis
  • Acquired spondylolysis of lumbar spine
  • Acquired spondylolysis of lumbosacral spine
  • Spondylolysis of lumbosacral region

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.

    • Spondylolysis(acquired)
      • lumbosacral 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

  • Spondylolysis

    deficient development or degeneration of a portion of the vertebra, usually in the pars interarticularis (the bone bridge between the superior and inferior facet joints of the lumbar vertebrae) leading to spondylolisthesis.

  • 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.

  • Congenital Spondylolysis

    spondylolysis, the cause of which is present from birth.

  • Congenital Spondylolysis, Lumbosacral Region

    a defect in the pars interarticularis of the vertebral arch of a lumbar or sacral vertebra that is present at the time of birth.

  • Spondylolysis

    a defect in the pars interarticularis of a vertebral bone.

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 M43.07 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 M43.07Overview

Is M43.07 (Spondylolysis) a billable code?

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

What MS-DRG does M43.07 group to?

When spondylolysis, lumbosacral 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 M43.07?

Under the General Equivalence Mappings, spondylolysis, lumbosacral 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.