ICD-10-CM Code M43.6


Version 2020 Billable Code

Valid for Submission

M43.6 is a billable code used to specify a medical diagnosis of torticollis. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code M43.6 might also be used to specify conditions or terms like acquired deformity of neck, acute muscle stiffness of neck, atlantoaxial subluxation, benign paroxysmal torticollis of infancy, cervical spine stiff, decreased range of cervical spine movement, etc

Short Description:Torticollis
Long Description:Torticollis

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code M43.6:

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • 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

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code M43.6 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Acquired deformity of neck
  • Acute muscle stiffness of neck
  • Atlantoaxial subluxation
  • Benign paroxysmal torticollis of infancy
  • Cervical spine stiff
  • Decreased range of cervical spine movement
  • Grisel's syndrome
  • Head tilt
  • Intermittent torticollis
  • Paroxysmal dystonia
  • Paroxysmal dystonia
  • Rheumatic torticollis
  • Sandifer syndrome
  • Stiff back
  • Stiff neck
  • Stiff neck symptom
  • Torticollis

Clinical Information

  • TORTICOLLIS-. a symptom not a disease of a twisted neck. in most instances the head is tipped toward one side and the chin rotated toward the other. the involuntary muscle contractions in the neck region of patients with torticollis can be due to congenital defects trauma inflammation tumors and neurological or other factors.

Diagnostic Related Groups

The ICD-10 code M43.6 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.


Convert M43.6 to ICD-9

Code Classification

  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Deforming dorsopathies (M40-M43)
      • Other deforming dorsopathies (M43)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients

Neck Injuries and Disorders

Any part of your neck - muscles, bones, joints, tendons, ligaments, or nerves - can cause neck problems. Neck pain is very common. Pain may also come from your shoulder, jaw, head, or upper arms.

Muscle strain or tension often causes neck pain. The problem is usually overuse, such as from sitting at a computer for too long. Sometimes you can strain your neck muscles from sleeping in an awkward position or overdoing it during exercise. Falls or accidents, including car accidents, are another common cause of neck pain. Whiplash, a soft tissue injury to the neck, is also called neck sprain or strain.

Treatment depends on the cause, but may include applying ice, taking pain relievers, getting physical therapy or wearing a cervical collar. You rarely need surgery.

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