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NSTEMI vs I21.A9 and sequencing of I21.A9 vs T82.867A

Date: Feb 6, 2018

Question:

The new MI codes are throwing us off a little. If our doctor admits the patient with a NSTEMI (I21.4), but after taking the pt to the cath lab an in-stent thrombosis is found, should we code the I21.4, I21.A9 and the T82.867A or leave the NSTEMI code off since by definition the stent thrombosis meets the definition of the new MI code I21.A9? Also, if we know an MI is due to an in-stent thrombosis, would you recommend sequencing the I21.A9 or the T82.867A first? Thank you.

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