2027 ICD-10-CM Diagnosis Code T69.1XXSChilblains, sequela
T69.1XXS is a billable ICD-10-CM diagnosis code for chilblains, 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. Coders also document this condition as chilblain lupus erythematosus. 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
T69.1XXS is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Other and unspecified effects of external causes (T66-T78).
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Chilblain lupus erythematosus
- Chilblains
- Chronic cutaneous lupus erythematosus
- Familial chilblain lupus erythematosus
- Local cold injury
- Pustular chilblain
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Other effects of reduced temperature (T69). 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 T69.1XXS: its own notes plus those printed at T69, block T66-T78, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.
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.-)
Code Also
A second code may be needed to fully describe the condition; the note gives no sequencing direction.
- 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-)
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 T69
- 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 T69.1XXS, its category, or a range that includes it.
Excludes2 2
These codes carry an Excludes2 note naming T69.1XXS: its condition is not part of those codes, and both may be reported when the patient has both.
- I73 Other peripheral vascular diseaseschilblains (T69.1) names T69.1, which includes this code
- Block T33-T34 Frostbitehypothermia and other effects of reduced temperature (T68, T69.-) names T69.-, which includes this code
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Chilblains
recurrent localized itching, swelling and painful erythema on the fingers, toes or ears, produced by exposure to cold.
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
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Convert T69.1XXS to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T69.1XXSOverview
What is the ICD-10 code for chilblains, sequela?
The ICD-10-CM code for chilblains, sequela is T69.1XXS (sometimes written as T691XXS). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is T69.1XXS (Chilblains) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report chilblains, sequela on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What does the 7th character S in T69.1XXS mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the chilblains itself has resolved, not the original event.
What MS-DRG does T69.1XXS group to?
When chilblains, 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 T69.1XXS 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 chilblains, sequela on inpatient claims. The code appears in the Other and unspecified effects of external causes (T66-T78) range of the CMS exempt list.
