tci Part B Insider - 2009 Issue 27

READER QUESTION: Get Details of the Patient's Asthma Cause Before You Assign Diagnosis Code

Hint: Know the definitions of intrinsic and extrinsic before you select your ICD-9 code. Question: What is the ICD-9 code that we should report when a patient presents with mild, intermittent asthma? We have been unable to find it in the ICD-9-CM manual and our carrier could not lead us to an appropriate code either. Answer: The ICD-9 manual does not include a specific code for mild, intermittent asthma. Rather, asthma is broadly classified under 493.x with several subclassifications, including the following, among others: • 493.0x -- Extrinsic asthma • 493.1x -- Intrinsic asthma • 493...

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