2019 ICD-10-CM Diagnosis Code G11.2

Late-onset cerebellar ataxia

    2016 2017 2018 2019 Billable/Specific Code Adult Dx (15-124 years)
  • G11.2 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM G11.2 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of G11.2 - other international versions of ICD-10 G11.2 may differ.
ICD-10-CM Coding Rules
  • G11.2 is applicable to adult patients aged 15 - 124 years inclusive.
The following code(s) above G11.2 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to G11.2:
  • G00-G99
    2019 ICD-10-CM Range G00-G99

    Diseases of the nervous system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the nervous system
  • G11
    ICD-10-CM Diagnosis Code G11

    Hereditary ataxia

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • cerebral palsy (G80.-)
    • hereditary and idiopathic neuropathy (G60.-)
    • metabolic disorders (E70-E88)
    Hereditary ataxia
Approximate Synonyms
  • Cerebellar ataxia (loss of muscle coordination)
  • Late onset cerebellar ataxia
ICD-10-CM G11.2 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 058 Multiple sclerosis and cerebellar ataxia with mcc
  • 059 Multiple sclerosis and cerebellar ataxia with cc
  • 060 Multiple sclerosis and cerebellar ataxia without cc/mcc

Convert G11.2 to ICD-9-CM

Code History
  • 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

Diagnosis Index entries containing back-references to G11.2:
  • Ataxia, ataxy, ataxic R27.0
    ICD-10-CM Diagnosis Code R27.0

    Ataxia, unspecified

      2016 2017 2018 2019 Billable/Specific Code
    Type 1 Excludes
    • ataxia following cerebrovascular disease (I69. with final characters -93)
    • cerebellar (hereditary) G11.9
      ICD-10-CM Diagnosis Code G11.9

      Hereditary ataxia, unspecified

        2016 2017 2018 2019 Billable/Specific Code
      Applicable To
      • Hereditary cerebellar ataxia NOS
      • Hereditary cerebellar degeneration
      • Hereditary cerebellar disease
      • Hereditary cerebellar syndrome
      • late-onset G11.2 (Marie's)
    • Marie's G11.2 (cerebellar) (heredofamilial) (late- onset)
    • Sanger-Brown's G11.2 (hereditary)
  • Marie's
    • cerebellar ataxia G11.2 (late-onset)
  • Sanger-Brown ataxia G11.2

ICD-10-CM Codes Adjacent To G11.2
G06.0 Intracranial abscess and granuloma
G06.1 Intraspinal abscess and granuloma
G06.2 Extradural and subdural abscess, unspecified
G07 Intracranial and intraspinal abscess and granuloma in diseases classified elsewhere
G08 Intracranial and intraspinal phlebitis and thrombophlebitis
G09 Sequelae of inflammatory diseases of central nervous system
G10 Huntington's disease
G11 Hereditary ataxia
G11.0 Congenital nonprogressive ataxia
G11.1 Early-onset cerebellar ataxia
G11.2 Late-onset cerebellar ataxia
G11.3 Cerebellar ataxia with defective DNA repair
G11.4 Hereditary spastic paraplegia
G11.8 Other hereditary ataxias
G11.9 Hereditary ataxia, unspecified
G12 Spinal muscular atrophy and related syndromes
G12.0 Infantile spinal muscular atrophy, type I [Werdnig-Hoffman]
G12.1 Other inherited spinal muscular atrophy
G12.2 Motor neuron disease
G12.20 …… unspecified
G12.21 Amyotrophic lateral sclerosis

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