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T31 vs T75.830D

T31 (Burns classified according to extent of body surface involved) compared with T75.830D (Gulf war illness, subsequent encounter), from the official CMS tabular data.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources

Summary

These codes can be reported together when both conditions are documented, because T75.830D lists T31 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named and billing status.T31 is “Burns classified according to extent of body surface involved”; T75.830D is “Gulf war illness, subsequent encounter”. T31 is a non-billable header; T75.830D is billable.

Registry fact

Can these codes be reported together?

Yes, when both are documented.T75.830D lists T31 under Excludes2: “burns (electric) (T20-T31)”. 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. T75.830D carries 1 Excludes1 note covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

Yes.T75.830D’s tabular entry: “burns (electric) (T20-T31)”. The note covers T31.

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.T31 is a non-billable header, but T75.830D 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

T75.830D
Gulf war illness, subsequent encounter
↔
T31
Burns classified according to extent of body surface involved

What we found

Yes, when both are documented.T75.830D carries an Excludes2 note covering T31: “burns (electric) (T20-T31)”

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 FY2027

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

Similar descriptions do not make codes interchangeable. The documentation and the official instructions decide which code applies.

Official descriptionDiffers
T31

Burns classified according to extent of body surface involved

T75.830D

Gulf war illness, subsequent encounter

StatusDiffers
T31
Non-billable header

A header is not reported on a claim; a code beneath it is.

Report instead: T31.0, T31.10, T31.11, T31.20, T31.21

T75.830D
Billable
Excludes1Differs
T31

None at this code

T75.830D
  • adverse effects NEC (T78.-)
Excludes2Differs
T31

None at this code

T75.830D
  • burns (electric) (T20-T31)
Use additional codeDiffers
T31

None at this code

T75.830D
  • code to identify associated manifestations
Code alsoDiffers
T31

None at this code

T75.830D
  • , if applicable, place of occurrence, such as:
  • highway rest stop (Y92.523)
  • school (private) (public) (state) as the place of occurrence of the external cause (Y92.21-)
  • service areas as the place of occurrence of the external cause (Y92.52-)
  • single-family non-institutional (private) house as the place of occurrence of the external cause (Y92.01-)
  • transport vehicle as the place of occurrence of the external cause (Y92.81-)
CategoryDiffers
T31

Is itself a category

T75.830D

T75 Other and unspecified effects of other external causes

ChapterSame for both

S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)

IncludesDiffers
T31

None at this code

T75.830D
  • Gulf war syndrome
7th characterDiffers
T31

None at this code

T75.830D
  • The appropriate 7th character is to be added to each code from category T75

No Code first note at either code.

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. In a row that differs, notes every code shares are dimmed.

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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