T67.6XXD ICD-10-CM Code: Heat fatigue, transient, subsequent encounter
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Inpatient Payment Groups (MS-DRG)
MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.
- MS-DRG 949 — AFTERCARE WITH CC/MCC (MDC 23)
- MS-DRG 950 — AFTERCARE WITHOUT CC/MCC (MDC 23)
A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for T67.6XXD in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
- erythema [dermatitis] ab igne (L59.0) Compare T67.6XXD vs L59.0 →
- malignant hyperpyrexia due to anesthesia (T88.3) Compare T67.6XXD vs T88.3 →
- radiation-related disorders of the skin and subcutaneous tissue (L55-L59) Compare T67.6XXD vs L55 →
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- burns (T20-T31) Compare T67.6XXD vs T20 →
- sunburn (L55.-) Compare T67.6XXD vs L55 →
- sweat disorder due to heat (L74-L75) Compare T67.6XXD vs L74 →
Code Also
Additional codes that may be required to fully describe the encounter.
- 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-)
Change history
No changes recorded for this code — unchanged since the FY2016 baseline of the change ledger.
Verify Before Coding
- Billable — reportable as written.
From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.
Referenced by Other Codes
Clinical classification (AHRQ CCSR):INJ058 — Effect of other external causes, subsequent encounter (default).
Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.
Potential MS-DRG Relationships (FY2026)
Not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity.
Named in the grouper logic of 2 MS-DRGs: DRG 949 (MDC 23), DRG 950 (MDC 23).
From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.
Official ICD-10-CM tabular notes on other codes that name T67.6XXD or its code family.
1 Excludes1 notes: R53.8 (via T67.-).
Frequently Asked Questions (FAQ) & Clinical Guidance
Does T67.6XXD require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category T67.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to T67.6XXD in its code family, with their registry titles.
- T67.5XXA — Heat exhaustion, unspecified, initial encounter
- T67.5XXD — Heat exhaustion, unspecified, subsequent encounter
- T67.5XXS — Heat exhaustion, unspecified, sequela
- T67.6 — Heat fatigue, transient
- T67.6XXA — Heat fatigue, transient, initial encounter
- T67.6XXS — Heat fatigue, transient, sequela
- T67.7 — Heat edema
- T67.7XXA — Heat edema, initial encounter
- T67.7XXD — Heat edema, subsequent encounter
- T67.7XXS — Heat edema, sequela