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ICD-10-CM Codes
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G00-G99
Diseases of the nervous system
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G70-G73
Diseases of myoneural junction and muscle
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G73-
Disorders of myoneural junction and muscle in diseases classified elsewhere
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2020 ICD-10-CM Diagnosis Code G73.3
Myasthenic syndromes in other diseases classified elsewhere
2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
- G73.3 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 G73.3 became effective on October 1, 2019.
- This is the American ICD-10-CM version of G73.3 - other international versions of ICD-10 G73.3 may differ.
ICD-10-CM Coding Rules
- G73.3 describes the manifestation of an underlying disease, not the disease itself.
Code FirstCode 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.
The following code(s) above
G73.3 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
G73.3:
- Myasthenic syndrome due to another disorder
- Myasthenic syndrome in other disease
ICD-10-CM G73.3 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 G73.3 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
ICD-10-CM Codes Adjacent To G73.3
G72.4 Inflammatory and immune myopathies, not elsewhere classified
G72.41 Inclusion body myositis [IBM]
G72.49 Other inflammatory and immune myopathies, not elsewhere classified
G72.8 Other specified myopathies
G72.81 Critical illness myopathy
G72.89 Other specified myopathies
G72.9 Myopathy, unspecified
G73 Disorders of myoneural junction and muscle in diseases classified elsewhere
G73.1 Lambert-Eaton syndrome in neoplastic disease
G73.3
Myasthenic syndromes in other diseases classified elsewhere
G73.7 Myopathy in diseases classified elsewhere
G80.0 Spastic quadriplegic cerebral palsy
G80.1 Spastic diplegic cerebral palsy
G80.2 Spastic hemiplegic cerebral palsy
G80.3 Athetoid cerebral palsy
G80.4 Ataxic cerebral palsy
G80.8 Other cerebral palsy
G80.9 Cerebral palsy, unspecified
G81 Hemiplegia and hemiparesis
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
