AHA Coding Clinic® for ICD-9 - 2011 Issue 1; Ask the Editor

Pancytopenia due to Drug

There has been some confusion about coding drug-induced pancytopenia. Coding Clinic advised how to code chemotherapy induced aplastic anemia but did not address pancytopenia secondary to drugs. In ICD-9-CM, pancytopenia is indexed to code 284.1, Pancytopenia. However, code 284.1 is excluded from pancytopenia due to or with aplastic anemia (284.9) as well as that which is drug induced (284.89). If the provider documents "pancytopenia due to chemotherapy" and there is no documentation of "aplastic anemia," how is this coded? ...

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