2027 ICD-10-CM Diagnosis Code T79.8XXSOther early complications of trauma, sequela
T79.8XXS is a billable ICD-10-CM diagnosis code for other early complications of trauma, 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 913 through 914. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
T79.8XXS is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Certain early complications of trauma (T79).
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acquired hypotonia
- Acquired porencephaly
- Acute confusional state, post-traumatic
- Acute traumatic otitis externa
- Acute-on-chronic respiratory failure
- Acute-on-chronic respiratory failure following trauma
- Alopecia due to friction and trauma
- Anemia due to mechanical damage
- Cerebrospinal fluid otorrhea
- Chronic respiratory failure
- Compression injury of nerve
- Contracture of gastrocnemius muscle due to traumatic injury
- Irritation of presacral tissue by content of ruptured viscera
- Lymphedema due to trauma
- Mucosal vesicle
- Porencephalic cyst
- Posttraumatic aphasia
- Post-traumatic cerebrospinal otorrhea
- Post-traumatic dementia with behavioral change
- Post-traumatic eczema
- Post-traumatic epilepsy
- Post-traumatic hydrocele
- Post-traumatic hypopituitarism
- Posttraumatic meningitis
- Post-traumatic nerve entrapment
- Posttraumatic porencephalic cyst of brain
- Post-traumatic scar
- Post-traumatic sterility
- Post-traumatic uveitis
- Respiratory failure following trauma
- Secondary eczematous condition
- Sterility
- Traumatic encephalopathy
- Traumatic fat necrosis
- Traumatic hemolytic anemia
- Traumatic hypotonia
- Traumatic iritis
- Traumatic oral hemorrhagic bulla
- Traumatic pneumonitis
- Ulcer of mouth due to trauma
- Vesicular stomatitis
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Certain early complications of trauma, not elsewhere classified (T79). 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 T79.8XXS: its own notes plus those printed at T79 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.-)
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 T79
- Ainitial encounter
- Dsubsequent encounter
- Ssequela this code
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Wounds and Injuries
An injury is damage to your body. It is a general term that refers to harm caused by accidents, falls, hits, weapons, and more. In the U.S., millions of people injure themselves every year. These injuries range from minor to life-threatening.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert T79.8XXS to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T79.8XXSOverview
What is the ICD-10 code for other early complications of trauma, sequela?
The ICD-10-CM code for other early complications of trauma, sequela is T79.8XXS (sometimes written as T798XXS). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is T79.8XXS (Other early complications of trauma) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other early complications of trauma, sequela on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What does the 7th character S in T79.8XXS mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the other early complications of trauma itself has resolved, not the original event.
What MS-DRG does T79.8XXS group to?
When other early complications of trauma, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 914, 913, with relative weights from 0.9281 to 1.5448 depending on complications. Higher weights mean higher Medicare reimbursement.
Is T79.8XXS 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 other early complications of trauma, sequela on inpatient claims. The code appears in the Certain early complications of trauma (T79) range of the CMS exempt list.
