Z18
⚠ Non-billable
Retained foreign body fragments
ICD-10-CM · FY2026 · Factors Influencing Health Status
Code
Z18
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Factors Influencing Health Status
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code Z18?
ICD-10-CM code Z18 represents Retained foreign body fragments. It is a non-billable header code requiring a more specific subcategory in the Factors Influencing Health Status chapter, effective October 1, 2025 – September 30, 2026.
Is Z18 billable?
No. Z18 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is Z18 in?
Z18 belongs to the Factors Influencing Health Status chapter (Z00–Z99) of ICD-10-CM.
Related codes in the Z18 category
Z18.0
Retained radioactive fragments
Non-billable
Z18.1
Retained metal fragments
Non-billable
Z18.2
Retained plastic fragments
Billable
Z18.3
Retained organic fragments
Non-billable
Z18.8
Other specified retained foreign body
Non-billable
Z18.9
Retained foreign body fragments, unspecified material
Billable
Z18.01
Retained depleted uranium fragments
Billable
Z18.09
Other retained radioactive fragments
Billable
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