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T33-T34 vs T69

T33-T34 (Frostbite (T33-T34)) compared with T69 (Other effects of reduced temperature), from the official CMS tabular data.

Summary

These codes can be reported together when both conditions are documented, because T33-T34 lists T69 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named.T33-T34 is “Frostbite (T33-T34)”; T69 is “Other effects of reduced temperature”.

Registry fact

Can these codes be reported together?

Yes, when both are documented.T33-T34 lists T69 under Excludes2: “hypothermia and other effects of reduced temperature (T68, T69.-)”. 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.T33-T34’s tabular entry: “hypothermia and other effects of reduced temperature (T68, T69.-)”. The note covers T69.

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?

Both are headers.Both are non-billable headers, and neither contains the other.

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

T33-T34
Frostbite (T33-T34)
↔
T69
Other effects of reduced temperature

What we found

Yes, when both are documented.T33-T34 carries an Excludes2 note covering T69: “hypothermia and other effects of reduced temperature (T68, T69.-)”

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

T33-T34Frostbite (T33-T34)T69Other effects of reduced temperature
Billing statusNon-billable headerNon-billable header

Report instead: T69.011A, T69.011D, T69.011S, T69.012A, T69.012D

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)
DefinitionFrostbite (T33-T34) is a non-billable ICD-10-CM category code (T33-T34).Other effects of reduced temperature is a non-billable ICD-10-CM category code (T69).
7th character—The appropriate 7th character is to be added to each code from category T69
Excludes2
hypothermia and other effects of reduced temperature (T68, T69.-)
frostbite (T33-T34)
Use additional code—
code to identify source of exposure:
Exposure to excessive cold of man-made origin (W93)
Exposure to excessive cold of natural origin (X31)
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