M43 – Other deforming dorsopathies
ICD-10-CM 2027 diagnosis code · Deforming dorsopathies
ICD-10-CM code
M43
- Code
M43(claims format:M43)- Description
- Other deforming dorsopathies
- 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
Billable codes under M43
M43 is a header code and cannot be used on claims. Choose the most specific code:
- M43.0 – SpondylolysisHeader (more codes below)
- M43.1 – SpondylolisthesisHeader (more codes below)
- M43.2 – Fusion of spineHeader (more codes below)
- M43.3 – Recurrent atlantoaxial dislocation with myelopathyBillable
- M43.4 – Other recurrent atlantoaxial dislocationBillable
- M43.5 – Other recurrent vertebral dislocationHeader (more codes below)
- M43.6 – TorticollisBillable
- M43.8 – Other specified deforming dorsopathiesHeader (more codes below)
- M43.9 – Deforming dorsopathy, unspecifiedBillable
Notes for M43
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.-)
Frequently asked questions
What is ICD-10 code M43?
M43 is the ICD-10-CM code for other deforming dorsopathies, in the block M40-M43 (Deforming dorsopathies).
Is M43 a billable code?
No. M43 is a header code with more specific child codes; report one of the billable codes listed above.
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.