Version 2024

2024 ICD-10-CM Diagnosis Code G71.1

Myotonic disorders

ICD-10-CM Code:
G71.1
ICD-10 Code for:
Myotonic disorders
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Diseases of the nervous system
    (G00–G99)
    • Diseases of myoneural junction and muscle
      (G70-G73)
      • Primary disorders of muscles
        (G71)

G71.1 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of myotonic disorders. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Myotonic disorders

Non-specific codes like G71.1 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for myotonic disorders:

  • Use G71.11 for Myotonic muscular dystrophy - BILLABLE CODE

  • Use G71.12 for Myotonia congenita - BILLABLE CODE

  • Use G71.13 for Myotonic chondrodystrophy - BILLABLE CODE

  • Use G71.14 for Drug induced myotonia - BILLABLE CODE

  • Use G71.19 for Other specified myotonic disorders - BILLABLE CODE

Clinical Information

  • Myotonic Disorders

    diseases characterized by myotonia, which may be inherited or acquired. myotonia may be restricted to certain muscles (e.g., intrinsic hand muscles) or occur as a generalized condition.
  • Myotonia

    prolonged failure of muscle relaxation after contraction. this may occur after voluntary contractions, muscle percussion, or electrical stimulation of the muscle. myotonia is a characteristic feature of myotonic disorders.

Patient Education


Muscle Disorders

Your muscles help you move and help your body work. Different types of muscles have different jobs. There are many problems that can affect muscles. Muscle disorders can cause weakness, pain or even paralysis.

Causes of muscle disorders include:

  • Injury or overuse, such as sprains or strains, cramps or tendinitis
  • A genetic disorder, such as muscular dystrophy
  • Some cancers
  • Inflammation, such as myositis
  • Diseases of nerves that affect muscles
  • Infections
  • Certain medicines

Sometimes the cause of muscle disorders is unknown.


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.