Disease staging: CliniCal anD CoDeD Criteria - HCUP

Clinical Criteria with Description, Diagnostic Findings and ICD-9-CM codes
DXCat Number: NEU17
MultiStage: No
DXCat Label: Myasthenia Gravis Specificity: A
Etiology:
Immune
Stage Description Diagnostic findings ICD-9-CM Codes
1.01 Localized myasthenia gravis Acetylcholine receptor antibodies [chemistry report]
DX 3580-35801, 7752;
OR positive response to edrophonium test
OR positive response to anti-cholinesterase agent
OR decline in height of muscle action potential [EMG report]
AND ptosis
OR diplopia
OR easy fatigability of ocular muscles
OR dysarthria
OR dysphonia
2.01 with dysphagia or thymoma Stage 1.01
AND dysphagia
OR thymoma
OR thymic hyperplasia
2.02 with generalized weakness Stage 1.01-2.01
AND weakness in any extremity
3.01 with myasthenic crisis or respiratory failure Stage 1.01-2.02
AND respiratory failure:
3.02 with shock Stage 3.01
AND shock:
4.00 with death Stage 3.01-3.02
AND death
STAGE 1.01 + (DX 1640, 2126,
2409, 24220, 7872-78729);
STAGE 1.01-2.01 + DX 78079;
STAGE 1.01-2.02 + GROUP
RESP_FAIL;
STAGE 1.01-3.01 + (GROUP
SHOCKC OR GROUP SHOCKN) ;
NO;
References:
Aminoff MJ. Nervous system. In: Tierney Jr LM, McPhee SJ, Papadakis MA, eds. Current Medical Diagnosis & Treatment. Stamford, CT: Appleton & Lange; 1998:916-973.
Drachman DB. Myasthenia gravis and other diseases of the neuromuscular junction. In: Fauci AS, Braunwald E, Isselbacher KJ, Wilson JD, Martin JB, Kasper DL, Hauser SL,
Longo DL, eds. Harrison's Principles of Internal Medicine. 14th ed. New York, NY: McGraw-Hill; 1998:2469-2473.
Keesey J, Myasthenia gravis. Archives of Neurology. 1998;55(5):745-6.
Wittbrodt ET. Drugs and myasthenia gravis. An update. Archives of Internal Medicine. 1997;157(4):399-408, 1997 Feb 24.
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