ICD-10-CM Code G73.7

Myopathy in diseases classified elsewhere

Version 2020 Billable Code Manifestation Diagnoses

Valid for Submission

G73.7 is a billable code used to specify a medical diagnosis of myopathy in diseases classified elsewhere. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code G73.7 might also be used to specify conditions or terms like amyloid myopathy, autoimmune inflammation of skeletal muscle, autoimmune necrotizing myopathy, carcinomatous myopathic syndrome, chronic myopathy with hypocalcemia and hypophosphatemia, endocrine myopathy, etc

Short Description:Myopathy in diseases classified elsewhere
Long Description:Myopathy in diseases classified elsewhere

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code G73.7:

Code First

Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the 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.
  • underlying disease, such as:
  • hyperparathyroidism E21.0 E21.3
  • hypoparathyroidism E20
  • glycogen storage disease E74.0
  • lipid storage disorders E75

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10 Code Edits are applicable to this code:

  • Manifestation diagnoses - Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and therefore should not be used as a principal diagnosis.


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Amyloid myopathy
  • Autoimmune inflammation of skeletal muscle
  • Autoimmune necrotizing myopathy
  • Carcinomatous myopathic syndrome
  • Chronic myopathy with hypocalcemia and hypophosphatemia
  • Endocrine myopathy
  • Glycogen storage disease, muscular form
  • Human immunodeficiency virus myopathy
  • Hypothyroid myopathy
  • Idiopathic inflammatory myopathy
  • Lipid storage myopathy
  • Luft's hypermetabolic myopathy
  • Metabolic myopathy
  • Metabolic myopathy due to lactate transporter defect
  • Mitochondrial-lipid-glycogen storage myopathy
  • Myopathy co-occurrent and due to hypercalcemia
  • Myopathy due to Cushing's syndrome
  • Myopathy due to magnesium deficiency
  • Myopathy due to polyarteritis nodosa
  • Myopathy in acromegaly
  • Myopathy in Addison's disease
  • Myopathy in Cushing's disease
  • Myopathy in hyperparathyroidism
  • Myopathy in hypoparathyroidism
  • Myopathy in hypopituitarism
  • Myopathy in myasthenia gravis
  • Myopathy in osteomalacia
  • Neutral lipid storage disease with myopathy
  • Nutritional myopathy
  • Polyglucosan body myopathy type 1
  • Potassium depletion myopathy
  • Primary familial amyloid myopathy
  • Primary sporadic amyloid myopathy
  • Protein deficiency myopathy
  • Secondary myopathy
  • Secondary myopathy
  • Secondary myopathy
  • Symptomatic inflammatory myopathy
  • Symptomatic inflammatory myopathy associated with another disorder
  • Thyrotoxic myopathy

Convert G73.7 to ICD-9

  • 359.5 - Myopathy in endocrin dis (Approximate Flag)

Code Classification

  • Diseases of the nervous system (G00–G99)
    • Diseases of myoneural junction and muscle (G70-G73)
      • Disord of myoneural junction and muscle in dis classd elswhr (G73)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients

Muscle Disorders

Your muscles help you move and help your body work. Different types of muscles have different jobs. There are many problems that can affect muscles. Muscle disorders can cause weakness, pain or even paralysis.

Causes of muscle disorders include

  • Injury or overuse, such as sprains or strains, cramps or tendinitis
  • A genetic disorder, such as muscular dystrophy
  • Some cancers
  • Inflammation, such as myositis
  • Diseases of nerves that affect muscles
  • Infections
  • Certain medicines

Sometimes the cause is not known.

[Learn More]