1. ICD-10-CM Codes
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2. G00-G99 Diseases of the nervous system
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3. G70-G73 Diseases of myoneural junction and muscle
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4. G71- Primary disorders of muscles
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5. 2021 ICD-10-CM Diagnosis Code G71.13

2021 ICD-10-CM Diagnosis Code G71.13

Myotonic chondrodystrophy

2016 2017 2018 2019 2020 2021 Billable/Specific Code

• G71.13 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2021 edition of ICD-10-CM G71.13 became effective on October 1, 2020.
• This is the American ICD-10-CM version of G71.13 - other international versions of ICD-10 G71.13 may differ.

• A syndrome of short stature; generalized myotonia with contractures of major joints, microstomia, and muscle rigidity; ocular anomalies, mainly blepharophimosis; and characteristic facies marked by pinched or frozen smile puckered lips. Some degree of mental retardation occurs in about 25% of patients. The affected children usually appear normal at birth and the symptoms become recognizable at 1 to 3 years of age. Malignant hyperthermia is a potentially lethal hazard during anesthesia.

• 091 Other disorders of nervous system with mcc
• 092 Other disorders of nervous system with cc
• 093 Other disorders of nervous system without cc/mcc

Convert G71.13 to ICD-9-CM

• 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
• 2017 (effective 10/1/2016): No change
• 2018 (effective 10/1/2017): No change
• 2019 (effective 10/1/2018): No change
• 2020 (effective 10/1/2019): No change
• 2021 (effective 10/1/2020): No change

• Type 2 Excludes: Q68
  , Q77
  , Q78
  ICD-10-CM Diagnosis Code Q68

  Other congenital musculoskeletal deformities

  2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code

  Type 1 Excludes

  • reduction defects of limb(s) (Q71-Q73)

  Type 2 Excludes

  • congenital myotonic chondrodystrophy (G71.13)
  ICD-10-CM Diagnosis Code Q77

  Osteochondrodysplasia with defects of growth of tubular bones and spine

  2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code

  Type 1 Excludes

  • mucopolysaccharidosis (E76.0-E76.3)

  Type 2 Excludes

  • congenital myotonic chondrodystrophy (G71.13)
  ICD-10-CM Diagnosis Code Q78

  Other osteochondrodysplasias

  2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code

  Type 2 Excludes

  • congenital myotonic chondrodystrophy (G71.13)

• Chondrodystrophy, chondrodystrophia (familial) (fetalis) (hypoplastic) Q78.9
  ICD-10-CM Diagnosis Code Q78.9

  Osteochondrodysplasia, unspecified

  2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt

  Applicable To

  • Chondrodystrophy NOS
  • Osteodystrophy NOS
  • myotonic G71.13 (congenital)
• Disease, diseased - see also Syndrome
  • Schwartz-Jampel G71.13
• Myotonia (acquisita) (intermittens) M62.89
  ICD-10-CM Diagnosis Code M62.89

  Other specified disorders of muscle

  2016 2017 2018 2019 2020 2021 Billable/Specific Code

  Applicable To

  • Muscle (sheath) hernia
  • chondrodystrophic G71.13
• Schwartz G71.13 (-Jampel)
• Syndrome - see also Disease
  • Schwartz G71.13 (-Jampel)

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.