T33.99XA — Superficial frostbite of other sites, 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.

Superficial frostbite of other sites, initial encounter is a billable ICD-10-CM diagnosis code (T33.99A).

Sequencing, inclusion, and exclusion notes published for T33.99XA in the official ICD-10-CM tabular list.

Conditions the official ICD-10-CM tabular list includes under this code.

Alternative terms the tabular list files under this code.

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 T33.

Official ICD-10-CM classifications closest to T33.99XA in its code family, with their registry titles.