M43.6 – Torticollis

ICD-10-CM 2027 diagnosis code · Deforming dorsopathies

Billable code

ICD-10-CM code M43.6

Code: M43.6 (claims format: M436)
Description: Torticollis
Billable: Yes – valid for HIPAA-covered transactions
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

Notes for M43.6

Excludes1 (not coded here):

congenital (sternomastoid) torticollis (Q68.0)
current injury - see Injury, of spine, by body region
ocular torticollis (R29.891)
psychogenic torticollis (F45.8)
spasmodic torticollis (G24.3)
torticollis due to birth injury (P15.2)

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.-)

Index terms for M43.6

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in M43

M43.0 – SpondylolysisHeader
M43.1 – SpondylolisthesisHeader
M43.2 – Fusion of spineHeader
M43.3 – Recurrent atlantoaxial dislocation with myelopathyBillable
M43.4 – Other recurrent atlantoaxial dislocationBillable
M43.5 – Other recurrent vertebral dislocationHeader
M43.8 – Other specified deforming dorsopathiesHeader
M43.9 – Deforming dorsopathy, unspecifiedBillable

Frequently asked questions

What is ICD-10 code M43.6?

M43.6 is the ICD-10-CM code for torticollis, in the block M40-M43 (Deforming dorsopathies).

Is M43.6 a billable code?

Yes. M43.6 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does M43.6 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.