What diagnosis code is used to report asthma-related anxiety in a child?

The appropriate International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) code is found by looking under the main term anxiety in the alphabetic index. The sub-term, due to or associated with physical condition, will direct to code 293.84, anxiety disorder in conditions classified elsewhere. The appropriate ICD-9-CM code to describe the patient’s asthma should be reported first in keeping with the ICD-9-CM convention that requires the underlying condition to be sequenced first, followed by the manifestation. For example

When reporting with International Classification of Diseases, 10th Revision, Clinical Modification, the alphabetic index term anxiety does not lead to a code for anxiety due to conditions classified elsewhere. Rather, the main term in the index is disorder with sub-terms of anxiety due to general medical condition and organic anxiety. This leads to code F06.4,...

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