Wiki Long-term anticoagulant use coding

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karinlouk

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We have a Warfarin Management Program here and we have been coding the reason the patient is on warfarin (i.e. a-fib, history of PE/DVT, etc.) and then we use Z79.01 for long-term anticoagulant use. One of the coders said that we should also use Z51.81 for therapeutic drug level monitoring. I feel like we are not really monitoring the level of a drug but the effect a drug is having so is the Z51.81 code really relevant?
 
The Z51.81 is the correct code to use first listed for any drug monitoring. You ar specifically looking at the amount of drug in the patient's system to determine if the amount is in the correct therapeutic range. The Coumadin will then be adjusted as needed based on that level.
 
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