2020 ICD-10-CM Diagnosis Code G70.81

Lambert-Eaton syndrome in disease classified elsewhere

    2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
  • G70.81 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM G70.81 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of G70.81 - other international versions of ICD-10 G70.81 may differ.
ICD-10-CM Coding Rules
  • G70.81 describes the manifestation of an underlying disease, not the disease itself.
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
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as G70.81. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • Lambert-Eaton syndrome in neoplastic disease (
    ICD-10-CM Diagnosis Code G73.1

    Lambert-Eaton syndrome in neoplastic disease

      2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
    Code First
    Type 1 Excludes
    • Lambert-Eaton syndrome not associated with neoplasm (G70.80-G70.81)
    G73.1
    )
The following code(s) above G70.81 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 G70.81:
  • G00-G99
    2020 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
  • G70
    ICD-10-CM Diagnosis Code G70

    Myasthenia gravis and other myoneural disorders

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Myasthenia gravis and other myoneural disorders
Approximate Synonyms
  • Secondary eaton lambert syndrome
ICD-10-CM G70.81 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 056 Degenerative nervous system disorders with mcc
  • 057 Degenerative nervous system disorders without mcc

Convert G70.81 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
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to G70.81:
  • Type 1 Excludes: G73.1
    ICD-10-CM Diagnosis Code G73.1

    Lambert-Eaton syndrome in neoplastic disease

      2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
    Code First
    Type 1 Excludes
    • Lambert-Eaton syndrome not associated with neoplasm (G70.80-G70.81)

Diagnosis Index entries containing back-references to G70.81:
  • Syndrome - see also Disease
    • Lambert-Eaton G70.80
      ICD-10-CM Diagnosis Code G70.80

      Lambert-Eaton syndrome, unspecified

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Lambert-Eaton syndrome NOS
      • in
        • specified disease NEC G70.81

ICD-10-CM Codes Adjacent To G70.81
G65.1 Sequelae of other inflammatory polyneuropathy
G65.2 Sequelae of toxic polyneuropathy
G70 Myasthenia gravis and other myoneural disorders
G70.0 Myasthenia gravis
G70.00 …… without (acute) exacerbation
G70.01 …… with (acute) exacerbation
G70.1 Toxic myoneural disorders
G70.2 Congenital and developmental myasthenia
G70.8 Other specified myoneural disorders
G70.80 Lambert-Eaton syndrome, unspecified
G70.81 Lambert-Eaton syndrome in disease classified elsewhere
G70.89 Other specified myoneural disorders
G70.9 Myoneural disorder, unspecified
G71 Primary disorders of muscles
G71.0 Muscular dystrophy
G71.00 …… unspecified
G71.01 Duchenne or Becker muscular dystrophy
G71.02 Facioscapulohumeral muscular dystrophy
G71.09 Other specified muscular dystrophies
G71.1 Myotonic disorders
G71.11 Myotonic muscular dystrophy

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