Retained stone or crystalline fragments

This diagnosis code indicates the presence of residual stone or crystalline material within the body, typically following a procedure to remove such formations or when they are identified incidentally. These fragments are distinct from actively forming stones and represent remnants that were not fully cleared.

Use this code when documentation specifies the presence of retained fragments of calculi or crystalline deposits after interventions like lithotripsy, ureteroscopy, or surgical removal. It also applies when imaging or pathology reports confirm residual stone material without evidence of active stone formation.

• Ensure documentation clearly distinguishes between retained fragments and active, newly formed calculi.
• Always code the specific location of the retained fragments if available (e.g., kidney, ureter, bladder).
• Consider sequencing this code after a procedure code for stone removal if the fragments are a post-procedural finding.