Ask Dr. Z

If a patient comes in for a abscess drain check and/or exchange and the diagnosis for the visit is one of the T codes that receive the 7th character A,D,S, would it still be considered active treatment "A" on each return visit until the drain is removed? Or would the return visits be coded with "D" for subsequent for all the drain check/exchange visits following initial placement? If they are still treating/managing the abscess with checking, evaluating, and sometimes replacing the drain, wouldn't this be considered "active" treatment on the return visits?