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S05.4 vs T15.02XA

S05.4 (Penetrating wound of orbit with or without foreign body) compared with T15.02XA (Foreign body in cornea, left eye, initial encounter), from the official CMS tabular data.

Summary

These codes can be reported together when both conditions are documented, because S05.4 lists T15.02XA under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named and billing status.S05.4 is “Penetrating wound of orbit with or without foreign body”; T15.02XA is “Foreign body in cornea, left eye, initial encounter”. S05.4 is a non-billable header; T15.02XA is billable.

Registry fact

Can these codes be reported together?

Yes, when both are documented.S05.4 lists T15.02XA under Excludes2: “effects of foreign body on external eye (T15.-)”. Excludes2 marks distinct conditions that may both be reported when both are documented.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code.

Official rule

Is there an Excludes2 relationship?

Yes.S05.4’s tabular entry: “effects of foreign body on external eye (T15.-)”. The note covers T15.02XA.

Official ruleGuide: Excludes1 vs Excludes2

Is one more specific?

Not comparable.The codes sit in different categories; specificity is only comparable within one category.

Is one a parent or header code?

One is a header.S05.4 is a non-billable header, but T15.02XA is not one of its subdivisions.

Registry fact

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.

MedCoder-derived

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels

Can these codes be reported together?

Informational

Excludes2 relationship

S05.4
Penetrating wound of orbit with or without foreign body
↔
T15.02XA
Foreign body in cornea, left eye, initial encounter

What we found

Yes, when both are documented.S05.4 carries an Excludes2 note covering T15.02XA: “effects of foreign body on external eye (T15.-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

What to review

Report both only when the documentation supports both conditions; otherwise report the one documented.

Guide: Excludes1 vs Excludes2Check these on a claim

Why it matters

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source / rule

CMS ICD-10-CM tabular instructional notes

Official guidance behind these answers

  • Section I.A.12.b — Excludes2 · applies to: Excludes2

    A type 2 Excludes note represents “Not included here.” An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

    ICD-10-CM Official Guidelines FY2026

Quoted from the ICD-10-CM Official Guidelines for Coding and Reporting in effect for the release shown. The tabular notes above are the code-level instruction; these sections are the convention that says how such a note is applied. Source document (CMS PDF) · Release and checksum

Side by side

S05.4Penetrating wound of orbit with or without foreign bodyT15.02XAForeign body in cornea, left eye, initial encounter
Billing statusNon-billable header

Report instead: S05.40XA, S05.40XD, S05.40XS, S05.41XA, S05.41XD

Billable
ClassificationS00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
DefinitionPenetrating wound of orbit with or without foreign body is a non-billable ICD-10-CM category code (S05.4).Foreign body in cornea, left eye, initial encounter is a billable ICD-10-CM diagnosis code (T15.02XA).
7th characterThe appropriate 7th character is to be added to each code from category S05The appropriate 7th character is to be added to each code from category T15
Includes
open wound of eye and orbit
injuries of ear
injuries of eye
injuries of face [any part]
—
Excludes2
retained (old) foreign body following penetrating wound in orbit (H05.5-)
2nd cranial [optic] nerve injury (S04.0-)
3rd cranial [oculomotor] nerve injury (S04.1-)
open wound of eyelid and periocular area (S01.1-)
orbital bone fracture (S02.1-, S02.3-, S02.8-)
superficial injury of eyelid (S00.1-S00.2)
burns and corrosions (T20-T32)
effects of foreign body in ear (T16)
effects of foreign body in larynx (T17.3)
effects of foreign body in mouth NOS (T18.0)
effects of foreign body in nose (T17.0-T17.1)
effects of foreign body in pharynx (T17.2)
effects of foreign body on external eye (T15.-)
frostbite (T33-T34)
insect bite or sting, venomous (T63.4)
foreign body in penetrating wound of orbit and eye ball (S05.4-, S05.5-)
open wound of eyelid and periocular area (S01.1-)
retained foreign body in eyelid (H02.8-)
retained (old) foreign body in penetrating wound of orbit and eye ball (H05.5-, H44.6-, H44.7-)
superficial foreign body of eyelid and periocular area (S00.25-)
foreign body accidentally left in operation wound (T81.5-)
foreign body in penetrating wound - See open wound by body region
residual foreign body in soft tissue (M79.5)
splinter, without open wound - See superficial injury by body region
Use additional code—
code, if known, for foreign body entering into or through a natural orifice (W44.-)
Code also
for any associated infection
—

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on.

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Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources