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ICD-10-CM Code G73.1
Lambert-Eaton syndrome in neoplastic disease

Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
Manifestation Code
Certain ICD-10-CM codes identify an underlying condition known as an etiology code. Conditions that arise as a result of an underlying condition (etiology), are referred to as Manifestations. In ICD-10-CM, etiology codes must be coded first, followed by the manifestation codes. When a condition requires etiology and manifestation codes, there is a "use additional code" note following the etiology code and a "code first" note following the manifestation code.
| ICD-10 from 2011 - 2016

G73.1 is a billable ICD code used to specify a diagnosis of lambert-Eaton syndrome in neoplastic disease. A 'billable code' is detailed enough to be used to specify a medical diagnosis.

The ICD code G731 is used to code Lambert-Eaton myasthenic syndrome

Lambert–Eaton myasthenic syndrome (LEMS, also Lambert–Eaton syndrome, or Eaton–Lambert syndrome) is a rare autoimmune disorder that is characterized by muscle weakness of the limbs. It is the result of an autoimmune reaction in which antibodies are formed against presynaptic voltage-gated calcium channels, and likely other nerve terminal proteins, in the neuromuscular junction (the connection between nerves and the muscle that they supply). The prevalence is 3.4 cases per million. Around 60% of those with LEMS have an underlying malignancy, most commonly small cell lung cancer; it is therefore regarded as a paraneoplastic syndrome (a condition that arises as a result of cancer elsewhere in the body).

Specialty: Neurology
MeSH Code: D015624
ICD 9 Code: 358.1

"Neuromuscular junction. Lambert–Eaton myasthenic syndrome is caused by autoantibodies to the presynaptic membrane. Myasthenia gravis is caused by autoantibodies to the postsynaptic acetylcholine receptors. 1. Presynaptic terminal 2. Sarcolemma 3. Synaptic vesicle 4. Nicotinic acetylcholine receptor 5. Mitochondrion"

Source: Wikipedia

Coding Notes for G73.1 Info for medical coders on how to properly use this ICD-10 code

Underlying neoplasm See Section C00-D49
Code Type-1 Excludes:
Type-1 Excludes
Type-1 Excludes mean the conditions excluded are mutually exclusive and should never be coded together. Excludes 1 means "do not code here."
Lambert-Eaton syndrome not associated with neoplasm (G70.80-G70.81) - instead, use code G70.80-

MS-DRG Mapping

  • DRG Group #056-057 - Degenerative nervous system disorders with MCC.
  • DRG Group #056-057 - Degenerative nervous system disorders without MCC.

ICD-10-CM Alphabetical Index References for 'G73.1 - Lambert-Eaton syndrome in neoplastic disease'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code G73.1. Click on any term below to browse the alphabetical index.


Lambert-Eaton syndrome in neoplastic disease (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 358.31 was previously used, G73.1 is the appropriate modern ICD10 code.

Parent Code: G73 - Disorders of myoneural junction and muscle in diseases classified elsewhere

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/G731