AHA Coding Clinic® for ICD-9 - 2013 Issue 2; Ask the Editor

Systemic Mastocytosis Exacerbation

The patient has systemic mastocytosis and is  admitted with recurrent episodes of anaphylaxis. The patient started to decompensate about 2 weeks ago for unclear reasons. He experienced recurrent flushing, which progressed to severe headaches, tremors and abdominal discomfort. The day of admission the patient awoke with new erythematous, generalized tremors and slightly swollen lips. What are the appropriate ICD-9-CM codes for systemic mastocytosis and recurrent anaphylactic episodes that are not due to a drug? ...

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