M43.18 Spondylolisthesis, sacral and sacrococcygeal region

Billable ICD-10-CM code, FY2026.

Applies from M43 Other deforming dorsopathies

Excludes1 (never code together)

• 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.-)

Applies from M43.1 Spondylolisthesis

Excludes1 (never code together)

• acute traumatic of lumbosacral region (S33.1)
• acute traumatic of sites other than lumbosacral- code to Fracture, vertebra, by region
• congenital spondylolisthesis (Q76.2)

MS-DRG index

Defines the logic of DRG(s) 551-552 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 738.4 Acquired spondylolisthesis (approximate)

Code annotations containing back-references to M43.18

Back-references to M43.1

• Type 1 Excludes: M43.0 Spondylolysis ("spondylolisthesis (M43.1)")
• Type 1 Excludes: Q76.2 Congenital spondylolisthesis ("spondylolisthesis (acquired) (M43.1-)")

Back-references to M43

• Type 2 Excludes: M95 Other acquired deformities of musculoskeletal system and connective tissue ("deforming dorsopathies (M40-M43)")

Diagnosis Index entries for M43.18

• Spondylolisthesis (acquired) (degenerative) › sacrococcygeal region

Nearby codes

• M43.13 Spondylolisthesis, cervicothoracic region
• M43.14 Spondylolisthesis, thoracic region
• M43.15 Spondylolisthesis, thoracolumbar region
• M43.16 Spondylolisthesis, lumbar region
• M43.17 Spondylolisthesis, lumbosacral region
• M43.18 Spondylolisthesis, sacral and sacrococcygeal region (this code)
• M43.19 Spondylolisthesis, multiple sites in spine
• M43.2 Fusion of spine
• M43.20 Fusion of spine, site unspecified
• M43.21 Fusion of spine, occipito-atlanto-axial region
• M43.22 Fusion of spine, cervical region