2026 ICD-10-CM Diagnosis Code T34.532SFrostbite with tissue necrosis of left finger(s), sequela

ICD-10-CM Codes›S00–T88›T33-T34›T34

ICD-10-CM T34.532S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T34.532S is a billable ICD-10-CM diagnosis code for frostbite with tissue necrosis of left finger(s), sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 922 through 923. The code is exempt from POA reporting. Coders also document this condition as frostbite of finger. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Effect of other external causes, sequela.

Code Identity

ICD-10-CM Code
T34.532S
Billable Status
Yes — Valid for Submission
Code Describes
Frostbite with tissue necrosis of left finger(s), sequela
Short Description
Frostbite with tissue necrosis of left finger(s), sequela
Same as the full description in the CMS dataset.
Parent Code
T34.532
Frostbite with tissue necrosis of left finger(s)

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT33-T34Frostbite
CategoryT34Frostbite with tissue necrosis
This CodeT34.532SFrostbite with tissue necrosis of left finger(s), sequela

Present on Admission (POA)Billing

T34.532S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Frostbite of finger
  • Frostbite of finger of left hand
  • Frostbite of left hand
  • Frostbite of left upper limb
  • Tissue necrosis of finger due to and following frostbite
  • Tissue necrosis of finger of left hand due to and following frostbite
  • Tissue necrosis of hand due to and following frostbite
  • Tissue necrosis of left hand due to and following frostbite
  • Tissue necrosis of left upper limb due to and following frostbite

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Frostbite with tissue necrosis (T34). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ074
Effect of other external causes, sequela
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Frostbite

Frostbite is an injury to the body that is caused by freezing. It most often affects the nose, ears, cheeks, chin, fingers, or toes. Frostbite can permanently damage the body, and severe cases can lead to amputation.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert T34.532S to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
909.4 Late eff cert ext cause
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About T34.532SOverview

Is T34.532S (Frostbite with tissue necrosis of left finger(s)) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report frostbite with tissue necrosis of left finger(s), sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in T34.532S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the frostbite with tissue necrosis of left finger(s) itself has resolved, not the original event.

What MS-DRG does T34.532S group to?

When frostbite with tissue necrosis of left finger(s), sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 922, 923, with relative weights from 1.0177 to 1.7494 depending on complications. Higher weights mean higher Medicare reimbursement.

Is T34.532S exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for frostbite with tissue necrosis of left finger(s), sequela on inpatient claims.

What is the ICD-9 equivalent of T34.532S?

Under the General Equivalence Mappings, frostbite with tissue necrosis of left finger(s), sequela converts to ICD-9-CM 909.4 (late eff cert ext cause). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.