ICD-9-CM Vol. 1 Diagnostic Codes →
8. DISEASES OF THE RESPIRATORY SYSTEM (460-519) →
section notes
CHRONIC OBSTRUCTIVE PULMONARY DISEASE AND ALLIED CONDITIONS (490-496) →
section notes
493 Asthma →
section notes
493.9 Asthma, unspecified →
section notes
493.90   Asthma NOS
493.91   Asthma w status asthmat
493.92   Asthma NOS w (ac) exac
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