2026 ICD-10-CM Diagnosis Code G70.00Myasthenia gravis without (acute) exacerbation

AHRQ’s CCSR groups this code into broader clinical categories.

• Myasthenia Gravis

  a disorder of neuromuscular transmission characterized by fatigable weakness of cranial and skeletal muscles with elevated titers of acetylcholine receptors or muscle-specific receptor tyrosine kinase (musk) autoantibodies. clinical manifestations may include ocular muscle weakness (fluctuating, asymmetric, external ophthalmoplegia; diplopia; ptosis; and weakness of eye closure) and extraocular fatigable weakness of facial, bulbar, respiratory, and proximal limb muscles. the disease may remain limited to the ocular muscles (ocular myasthenia). thymoma is commonly associated with this condition.

• Myasthenia Gravis, Autoimmune, Experimental

  any autoimmune animal disease model used in the study of myasthenia gravis. injection with purified neuromuscular junction acetylcholine receptor (achr) (see receptors, cholinergic) components results in a myasthenic syndrome that has acute and chronic phases. the motor endplate pathology, loss of acetylcholine receptors, presence of circulating anti-achr antibodies, and electrophysiologic changes make this condition virtually identical to human myasthenia gravis. passive transfer of achr antibodies or lymphocytes from afflicted animals to normals induces passive transfer experimental autoimmune myasthenia gravis. (from joynt, clinical neurology, 1997, ch 54, p3)

• Myasthenia Gravis, Neonatal

  a disorder of neuromuscular transmission that occurs in a minority of newborns born to women with myasthenia gravis. clinical features are usually present at birth or develop in the first 3 days of life and consist of hypotonia and impaired respiratory, suck, and swallowing abilities. this condition is associated with the passive transfer of acetylcholine receptor antibodies through the placenta. in the majority of infants the myasthenic weakness resolves (i.e., transient neonatal myasthenia gravis) although this disorder may rarely continue beyond the neonatal period (i.e., persistent neonatal myasthenia gravis). (from menkes, textbook of child neurology, 5th ed, p823; neurology 1997 jan;48(1):50-4)

• Myasthenic Syndromes, Congenital

  a heterogeneous group of disorders characterized by a congenital defect in neuromuscular transmission at the neuromuscular junction. this includes presynaptic, synaptic, and postsynaptic disorders (that are not of autoimmune origin). the majority of these diseases are caused by mutations of various subunits of the nicotinic acetylcholine receptor (receptors, nicotinic) on the postsynaptic surface of the junction. (from arch neurol 1999 feb;56(2):163-7)

• Congenital Myasthenic Syndrome

  a group of rare genetic neuromuscular disorders characterized by neuromuscular junction defects. the defects are classified as presynaptic, synaptic, or postsynaptic. signs and symptoms include muscle weakness, easy fatigability, feeding and respiratory difficulties, and scoliosis.

• Congenital Myasthenic Syndrome 12|CMS12

  an autosomal recessive form of congenital myasthenic syndrome caused by mutation(s) in the gfpt1 gene, encoding glutamine--fructose-6-phosphate aminotransferase 1.

• Congenital Myasthenic Syndrome 5|CMS5|EAD|Endplate Acetylcholinesterase Deficiency

  congenital myasthenic syndrome caused by mutation(s) in the colq gene, encoding acetylcholinesterase collagenic tail peptide. it is inherited in an autosomal recessive manner.

• Congenital Myasthenic Syndrome-4C|CMS4C|Myasthenic Syndrome, Congenital, 4C, Associated with Acetylcholine Receptor Deficiency

  an autosomal recessive form of congenital myasthenic syndrome caused by mutation(s) in the chrne gene, encoding acetylcholine receptor subunit epsilon.

• Presynaptic Congenital Myasthenic Syndrome 6|CMS6

  congenital myasthenic syndrome caused by mutation(s) in the chat gene, encoding choline o-acetyltransferase. it is inherited in an autosomal recessive manner.

Myasthenia Gravis

Myasthenia gravis, sometimes called MG, is a chronic (long-lasting) disease that causes weakness in your voluntary muscles. The voluntary muscles are the ones that you can control. They include the muscles you use for:

The full article covers:

• What is myasthenia gravis?
• What causes myasthenia gravis?
• Who is more likely to develop myasthenia gravis?
• What are the symptoms of myasthenia gravis?
• How is myasthenia gravis diagnosed?
• What are the treatments for myasthenia gravis?

Read the full article at MedlinePlus

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