Z18 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Retained foreign body fragments.
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Embedded fragment (status)
Embedded splinter (status)
Retained foreign body status
Artificial joint prosthesis status (Z96.6-)
Foreign body accidentally left during a procedure (T81.5-)
Foreign body entering through orifice (T15-T19)
In situ cardiac device (Z95.-)
Organ or tissue replaced by means other than transplant (Z96.-, Z97.-)
Organ or tissue replaced by transplant (Z94.-)
Personal history of retained foreign body fully removed Z87.821
Superficial foreign body (non-embedded splinter) - code to superficial foreign body, by site
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