Z03.81Encounter for observation for suspected exposure to biological agents ruled out

Z03.81 is the ICD-10-CM diagnosis code for encounter for observation for suspected exposure to biological agents ruled out. It belongs to category Z03 (encounter for medical observation for suspected diseases and conditions ruled out), block Z00-Z13 (persons encountering health services for examinations) and chapter 21 (factors influencing health status and contact with health services). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within Z03.8 (encounter for observation for other suspected diseases and conditions ruled out), Z03.81 is specifically for encounter for observation for suspected exposure to biological agents ruled out. Related codes cover suspected foreign body ruled out (Z03.82), suspected conditions related to home physiologic monitoring device ruled out (Z03.83) and other suspected diseases and conditions ruled out (Z03.89).

To report this condition, pick the subcode that matches the documentation: Z03.810 (out) and Z03.818 (out).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.