2018 ICD-10-CM Diagnosis Code G13.2

Systemic atrophy primarily affecting the central nervous system in myxedema

ICD-10-CM Coding Rules
Code First
Code First Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • underlying disease, such as:
  • hypothyroidism (
    ICD-10-CM Diagnosis Code E03
    • E03 Other hypothyroidism
      • E03.0 Congenital hypothyroidism with diffuse goiter...
      • E03.1 Congenital hypothyroidism without goiter
      • E03.2 Hypothyroidism due to medicaments and other e...
      • E03.3 Postinfectious hypothyroidism
      • E03.4 Atrophy of thyroid (acquired)
      • E03.5 Myxedema coma
      • E03.8 Other specified hypothyroidism
      • E03.9 Hypothyroidism, unspecified
    E03.-
    )
  • myxedematous congenital iodine deficiency (
    ICD-10-CM Diagnosis Code E00.1

    Congenital iodine-deficiency syndrome, myxedematous type

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Endemic hypothyroid cretinism
    • Endemic cretinism, myxedematous type
    E00.1
    )
The following code(s) above G13.2 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 G13.2:
  • G00-G99
    2018 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
ICD-10-CM G13.2 is grouped within Diagnostic Related Group(s) (MS-DRG v35.0):

Convert G13.2 to ICD-9-CM

Code History
Code annotations containing back-references to G13.2:
ICD-10-CM Codes Adjacent To G13.2
G12.22 Progressive bulbar palsy
G12.23 Primary lateral sclerosis
G12.24 Familial motor neuron disease
G12.25 Progressive spinal muscle atrophy
G12.29 Other motor neuron disease
G12.8 Other spinal muscular atrophies and related syndromes
G12.9 Spinal muscular atrophy, unspecified
G13 Systemic atrophies primarily affecting central nervous system in diseases classified elsewhere
G13.0 Paraneoplastic neuromyopathy and neuropathy
G13.1 Other systemic atrophy primarily affecting central nervous system in neoplastic disease
G13.2 Systemic atrophy primarily affecting the central nervous system in myxedema
G13.8 Systemic atrophy primarily affecting central nervous system in other diseases classified elsewhere
G14 Postpolio syndrome
G20 Parkinson's disease
G21 Secondary parkinsonism
G21.0 Malignant neuroleptic syndrome
G21.1 Other drug-induced secondary parkinsonism
G21.11 Neuroleptic induced parkinsonism
G21.19 Other drug induced secondary parkinsonism
G21.2 Secondary parkinsonism due to other external agents
G21.3 Postencephalitic parkinsonism

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