2026 ICD-10-CM Diagnosis Code T81.329SDeep disruption or dehiscence of operation wound, unspecified, sequela
T81.329S is a billable ICD-10-CM diagnosis code for deep disruption or dehiscence of operation wound, unspecified, 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 dehiscence of fascia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
T81.329S 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.
- Dehiscence of fascia
- Dehiscence of nerve repair
- Dehiscence of tendon repair
- Disorder of nerve repair
- Disorder of tendon repair
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Complications of procedures, not elsewhere classified (T81). 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.
Code History & ChangesHistory
Replacement T81.329S replaces the following previously assigned code(s):
- T81.32XS - Disrupt of internal operation (surgical) wound, NEC, sequela
Questions About T81.329SOverview
Is T81.329S a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report deep disruption or dehiscence of operation wound, unspecified, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in T81.329S mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the deep disruption or dehiscence of operation wound, unspecified itself has resolved, not the original event.
What MS-DRG does T81.329S group to?
When deep disruption or dehiscence of operation wound, unspecified, 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 T81.329S 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 deep disruption or dehiscence of operation wound, unspecified, sequela on inpatient claims.
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.
