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ICD-10-CM Code G71.12
Myotonia congenita

Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
| ICD-10 from 2011 - 2016

G71.12 is a billable ICD code used to specify a diagnosis of myotonia congenita. A 'billable code' is detailed enough to be used to specify a medical diagnosis.

The ICD code G711 is used to code Neuromyotonia

Neuromyotonia (NMT), also known as Isaacs Syndrome and Isaacs-Merton syndrome, is a form of peripheral nerve hyperexcitability that causes spontaneous muscular activity resulting from repetitive motor unit action potentials of peripheral origin. Prevalence is unknown but 100—200 cases have been reported so far.

Specialty: Neurology
MeSH Codes: D020386, D020967, D009222, D009224
ICD 9 Codes: 333.90, 359.2, 359.2, 359.2
Source: Wikipedia

Coding Notes for G71.12 Info for medical coders on how to properly use this ICD-10 code

Inclusion Terms:
Inclusion Terms
Inclusion Terms are a list of concepts for which a specific code is used. The list of Inclusion Terms is useful for determining the correct code in some cases, but the list is not necessarily exhaustive.
Acetazolamide responsive myotonia congenita
Dominant myotonia congenita [Thomsen disease]
Myotonia levior
Recessive myotonia congenita [Becker disease]

MS-DRG Mapping

  • DRG Group #091-093 - Other disorders of nervous system with MCC.
  • DRG Group #091-093 - Other disorders of nervous system with CC.
  • DRG Group #091-093 - Other disorders of nervous system without CC or MCC.

Related Concepts SNOMET-CT

  • Congenital myotonia, autosomal recessive form (disorder)

ICD-10-CM Alphabetical Index References for 'G71.12 - Myotonia congenita'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code G71.12. Click on any term below to browse the alphabetical index.

Thomsen disease (G71.12)


Myotonia congenita (exact match)

This is the official exact match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that in all cases where the ICD9 code 359.22 was previously used, G71.12 is the appropriate modern ICD10 code.

Parent Code: G71.1 - Myotonic disorders

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/G7112