T34.40XA — Frostbite with tissue necrosis of unspecified arm, initial 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 (FY2026), Appendix B.

MS-DRG 922 — OTHER INJURY, POISONING AND TOXIC EFFECT DIAGNOSES WITH MCC (MDC 21)
MS-DRG 923 — OTHER INJURY, POISONING AND TOXIC EFFECT DIAGNOSES WITHOUT MCC (MDC 21)

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.

Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.

Frostbite with tissue necrosis of unspecified arm, initial encounter is a billable ICD-10-CM diagnosis code (T34.40A).

Sequencing, inclusion, and exclusion notes published for T34.40XA in the official ICD-10-CM tabular list.

Conditions not covered by this code, but which may be reported alongside it when both are present.

Yes. The appropriate 7th character is to be added to each code from category T34.

Official ICD-10-CM classifications closest to T34.40XA in its code family, with their registry titles.

T34.3XXA — Frostbite with tissue necrosis of abdominal wall, lower back and pelvis, initial encounter
T34.3XXD — Frostbite with tissue necrosis of abdominal wall, lower back and pelvis, subsequent encounter
T34.3XXS — Frostbite with tissue necrosis of abdominal wall, lower back and pelvis, sequela
T34.4 — Frostbite with tissue necrosis of arm
T34.40 — Frostbite with tissue necrosis of unspecified arm
T34.40XD — Frostbite with tissue necrosis of unspecified arm, subsequent encounter
T34.40XS — Frostbite with tissue necrosis of unspecified arm, sequela
T34.41 — Frostbite with tissue necrosis of right arm
T34.41XA — Frostbite with tissue necrosis of right arm, initial encounter
T34.41XD — Frostbite with tissue necrosis of right arm, subsequent encounter