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N166Remark Code (RARC)Deactivated

Effective 02/28/2003 · Stopped 01/31/2004

N166 Remark Code (Deactivated)

N166 is a retired remittance advice remark code. Payers stopped using it on 01/31/2004.

Seeing N166 on a Remittance?

N166 was retired effective 01/31/2004 and should not appear on new remittances.
Official retirement note: Consider using N159
If N166 appears on an old ERA you are reworking, interpret it per the remittance date, then follow the current code's guidance for any corrected claim.