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Q&A: Complication codes versus condition codes

Q: When I started as a coder, I learned that the complication code, such as from ICD-9-CM series 998 or 999, takes precedence as the reason of admission when present with another contributing condition. Is this correct, and is there any written guidance from AHA Coding Clinic for ICD-9-CM/ICD-10-CM/PCS that discusses this?

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