2021 ICD-10-CM Code Z18

Retained foreign body fragments

Version 2021
Non-Billable Code

Not Valid for Submission

Z18 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of retained foreign body fragments. The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Short Description:Retained foreign body fragments
Long Description:Retained foreign body fragments

Code Classification

Specific Coding for Retained foreign body fragments

Header codes like Z18 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for retained foreign body fragments:

  • Z18.0 - Retained radioactive fragments
  • Z18.01 - Retained depleted uranium fragments
  • Z18.09 - Other retained radioactive fragments
  • Z18.1 - Retained metal fragments
  • Z18.10 - Retained metal fragments, unspecified
  • Z18.11 - Retained magnetic metal fragments
  • Z18.12 - Retained nonmagnetic metal fragments
  • Z18.2 - Retained plastic fragments
  • Z18.3 - Retained organic fragments
  • Z18.31 - Retained animal quills or spines
  • Z18.32 - Retained tooth
  • Z18.33 - Retained wood fragments
  • Z18.39 - Other retained organic fragments
  • Z18.8 - Other specified retained foreign body
  • Z18.81 - Retained glass fragments
  • Z18.83 - Retained stone or crystalline fragments
  • Z18.89 - Other specified retained foreign body fragments
  • Z18.9 - ... unspecified material

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code Z18:


This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Information for Patients

Foreign Bodies

If you've ever gotten a splinter or had sand in your eye, you've had experience with a foreign body. A foreign body is something that is stuck inside you but isn't supposed to be there. You may inhale or swallow a foreign body, or you may get one from an injury to almost any part of your body. Foreign bodies are more common in small children, who sometimes stick things in their mouths, ears, and noses.

Some foreign bodies, like a small splinter, do not cause serious harm. Inhaled or swallowed foreign bodies may cause choking or bowel obstruction and may require medical care.

[Learn More in MedlinePlus]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)