In your ICD-10-CM book, turn to code J17 in the Tabular List. Under this code is a "Code first underlying disease, such as: Q fever" notation. What is the code next to the Q fever?

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The code next to the Q fever is A78, which is the ICD-10-CM code for Q fever. The "code first underlying disease" notation means that when a patient has a respiratory infection due to Q fever, the code for Q fever should be listed first, followed by the code for the respiratory infection (J17 in this case).

In Your ICD-10-CM Book, Turn to Code J17 in the Tabular