2027 ICD-10-CM Diagnosis Code T33.532SSuperficial frostbite of left finger(s), sequela
T33.532S is a billable ICD-10-CM diagnosis code for superficial frostbite 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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 922 through 923. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Effect of other external causes, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
T33.532S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Frostbite (T33-T34).
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Frostbite of all digits of left hand
- Frostbite of finger of left hand
- Frostbite of index finger
- Frostbite of left hand
- Frostbite of left index finger
- Frostbite of left little finger
- Frostbite of left middle finger
- Frostbite of left ring finger
- Frostbite of left thumb
- Frostbite of little finger
- Frostbite of middle finger
- Frostbite of ring finger
- Frostbite of thumb
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Superficial frostbite (T33). 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 2027, published by CMS and the National Center for Health Statistics.
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to T33.532S: its own notes plus those printed at T33, block T33-T34, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- frostbite with partial thickness skin loss
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to identify any retained foreign body, if applicable (Z18.-)
Notes
General instructions on how these codes are used.
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
7th Character
Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.
- The appropriate 7th character is to be added to each code from category T33
- Ainitial encounter
- Dsubsequent encounter
- Ssequela this code
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name T33.532S, its category, or a range that includes it.
Excludes2 2
These codes carry an Excludes2 note naming T33.532S: its condition is not part of those codes, and both may be reported when the patient has both.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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 T33.532S to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T33.532SOverview
What is the ICD-10 code for superficial frostbite of left finger(s), sequela?
The ICD-10-CM code for superficial frostbite of left finger(s), sequela is T33.532S (sometimes written as T33532S). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is T33.532S (Superficial frostbite of left finger(s)) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report superficial frostbite of left finger(s), sequela on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What does the 7th character S in T33.532S mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the superficial frostbite of left finger(s) itself has resolved, not the original event.
What MS-DRG does T33.532S group to?
When superficial frostbite of left finger(s), sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 923, 922, with relative weights from 0.9980 to 1.6248 depending on complications. Higher weights mean higher Medicare reimbursement.
Is T33.532S 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 superficial frostbite of left finger(s), sequela on inpatient claims. The code appears in the Frostbite (T33-T34) range of the CMS exempt list.
