T18.5 Foreign body in anus and rectum

✓ Billable ICD-10-CM 2026
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The ICD-10-CM code for Foreign body in anus and rectum is T18.5 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Section
T15-T19: Effects of foreign body entering through natural orifice (T15-T19)
Category T18
21 codes (15 billable)
FY2026 Status
Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to T18.5:

  • Foreign body › alimentary tract › rectosigmoid (junction)
  • Foreign body › entering through orifice › anus
  • Foreign body › alimentary tract › anus
  • Foreign body › entering through orifice › rectum
  • Foreign body › alimentary tract › rectum
  • Foreign body › entering through orifice › rectosigmoid (junction)

Inclusion Terms

  • Foreign body in rectosigmoid (junction)

Official Coding Guidelines

Sequence blood vessel/nerve injury first (fragment)

injury is to the blood vessels or nerves, that injury should be sequenced first.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.19.b.2
Do not assign injury codes for iatrogenic injuries; code complication

3) Iatrogenic injuries Injury codes from Chapter 19 should not be assigned for injuries that occur during, or as a result of, a medical intervention. Assign the appropriate complication code(s).

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.19.b.3

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

Parent Code

T18 Foreign body in alimentary tract

Related Codes in T18

T18 Foreign body in alimentary tract T18.0 Foreign body in mouth T18.1 Foreign body in esophagus T18.10 Unspecified foreign body in esophagus T18.100 Unspecified foreign body in esophagus causing compression of trachea T18.108 Unspecified foreign body in esophagus causing other injury T18.11 Gastric contents in esophagus T18.110 Gastric contents in esophagus causing compression of trachea T18.118 Gastric contents in esophagus causing other injury T18.12 Food in esophagus T18.120 Food in esophagus causing compression of trachea T18.128 Food in esophagus causing other injury T18.19 Other foreign object in esophagus T18.190 Other foreign object in esophagus causing compression of trachea T18.198 Other foreign object in esophagus causing other injury T18.2 Foreign body in stomach T18.3 Foreign body in small intestine T18.4 Foreign body in colon T18.8 Foreign body in other parts of alimentary tract T18.9 Foreign body of alimentary tract, part unspecified
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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