M43.1 – Spondylolisthesis

ICD-10-CM 2027 diagnosis code · Deforming dorsopathies

Non-billable header

ICD-10-CM code M43.1

Code: M43.1 (claims format: M431)
Description: Spondylolisthesis
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
Block: M40-M43 Deforming dorsopathies
Parent codes: M43

Billable codes under M43.1

M43.1 is a header code and cannot be used on claims. Choose the most specific code:

M43.10 – Spondylolisthesis, site unspecifiedBillable
M43.11 – Spondylolisthesis, occipito-atlanto-axial regionBillable
M43.12 – Spondylolisthesis, cervical regionBillable
M43.13 – Spondylolisthesis, cervicothoracic regionBillable
M43.14 – Spondylolisthesis, thoracic regionBillable
M43.15 – Spondylolisthesis, thoracolumbar regionBillable
M43.16 – Spondylolisthesis, lumbar regionBillable
M43.17 – Spondylolisthesis, lumbosacral regionBillable
M43.18 – Spondylolisthesis, sacral and sacrococcygeal regionBillable
M43.19 – Spondylolisthesis, multiple sites in spineBillable

Notes for M43.1

Excludes1 (not coded here):

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

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

M43 – Other deforming dorsopathies

Excludes1 (not coded here):

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.-)

Related codes in M43

M43.0 – SpondylolysisHeader
M43.2 – Fusion of spineHeader
M43.3 – Recurrent atlantoaxial dislocation with myelopathyBillable
M43.4 – Other recurrent atlantoaxial dislocationBillable
M43.5 – Other recurrent vertebral dislocationHeader
M43.6 – TorticollisBillable
M43.8 – Other specified deforming dorsopathiesHeader
M43.9 – Deforming dorsopathy, unspecifiedBillable

Frequently asked questions

What is ICD-10 code M43.1?

M43.1 is the ICD-10-CM code for spondylolisthesis, in the block M40-M43 (Deforming dorsopathies).

Is M43.1 a billable code?

No. M43.1 is a header code with more specific child codes; report one of the billable codes listed above.

What category does M43.1 belong to?

It belongs to category M43 – Other deforming dorsopathies.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.