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L74 vs T67.2XXA

L74 (Eccrine sweat disorders) compared with T67.2XXA (Heat cramp, initial 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 20, 2026 · All releases and sources

Summary

These codes can be reported together when both conditions are documented, because T67.2XXA lists L74 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named, billing status and chapter.L74 is “Eccrine sweat disorders”; T67.2XXA is “Heat cramp, initial encounter”. L74 is a non-billable header; T67.2XXA is billable. L74 sits in L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99); T67.2XXA in S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88).

Registry fact

Can these codes be reported together?

Yes, when both are documented.T67.2XXA lists L74 under Excludes2: “sweat disorder due to heat (L74-L75)”. 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. L74 carries 1 Excludes1 note and T67.2XXA carries 3 Excludes1 notes covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

Yes.T67.2XXA’s tabular entry: “sweat disorder due to heat (L74-L75)”. The note covers L74.

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.L74 is a non-billable header, but T67.2XXA 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

T67.2XXA
Heat cramp, initial encounter
↔
L74
Eccrine sweat disorders

What we found

Yes, when both are documented.T67.2XXA carries an Excludes2 note covering L74: “sweat disorder due to heat (L74-L75)”

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

L74Eccrine sweat disordersT67.2XXAHeat cramp, initial encounter
Billing statusNon-billable header

Report instead: L74.0, L74.1, L74.2, L74.3, L74.4

Billable
ClassificationL00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99)S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
DefinitionEccrine sweat disorders is a non-billable ICD-10-CM category code (L74).Heat cramp, initial encounter is a billable ICD-10-CM diagnosis code (T67.2XXA).
7th character—The appropriate 7th character is to be added to each code from category T67
Excludes1
congenital malformations of integument (Q84.-)
erythema [dermatitis] ab igne (L59.0)
malignant hyperpyrexia due to anesthesia (T88.3)
radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
Excludes2
generalized hyperhidrosis (R61)
burns (T20-T31)
sunburn (L55.-)
sweat disorder due to heat (L74-L75)
Code also—
, 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-)

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