2026 ICD-10-CM Diagnosis Code T79.8XXSOther early complications of trauma, sequela

ICD-10-CM Codes›S00–T88›T79›T79

ICD-10-CM T79.8XXS
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

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 2026 (October 1, 2025 through September 30, 2026) 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

ICD-10-CM Code
T79.8XXS
Billable Status
Yes — Valid for Submission
Code Describes
Other early complications of trauma, sequela
Short Description
Other early complications of trauma, sequela
Same as the full description in the CMS dataset.
Parent Code
T79.8
Other early complications of trauma

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT79Certain early complications of trauma
CategoryT79Certain early complications of trauma, not elsewhere classified
This CodeT79.8XXSOther early complications of trauma, sequela

Present on Admission (POA)Billing

T79.8XXS 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.

  • 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 oral ulceration
  • Traumatic pneumonitis
  • 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 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

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

CCSR INJ073
Injury, sequela
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Vesicular Stomatitis

    a viral disease caused by at least two distinct species (serotypes) in the vesiculovirus genus: vesicular stomatitis indiana virus and vesicular stomatitis new jersey virus. it is characterized by vesicular eruptions on the oral mucosa in cattle, horses, pigs, and other animals. in humans, vesicular stomatitis causes an acute influenza-like illness.

  • Vesicular stomatitis Indiana virus

    the type species of vesiculovirus causing a disease symptomatically similar to foot-and-mouth disease in cattle, horses, and pigs. it may be transmitted to other species including humans, where it causes influenza-like symptoms.

  • Vesicular stomatitis New Jersey virus

    a species of vesiculovirus causing vesicular stomatitis primarily in cattle, horses, and pigs. it can be transmitted to humans where it causes influenza-like symptoms.

  • Vesiculovirus

    a genus of the family rhabdoviridae that infects a wide range of vertebrates and invertebrates. the type species is vesicular stomatitis indiana virus.

  • Cerebrospinal Fluid Otorrhea

    discharge of cerebrospinal fluid through the external auditory meatus or through the eustachian tube into the nasopharynx. this is usually associated with craniocerebral trauma (e.g., skull fracture involving the temporal bone;), neurosurgical procedures; or other conditions, but may rarely occur spontaneously. (from am j otol 1995 nov;16(6):765-71)

  • Traumatic Encephalopathy

    encephalopathy resulting from trauma.

  • Porencephalic Cyst

    a congenital or acquired cystic cavity within the cerebral hemisphere.

  • Cerebrospinal Fluid Otorrhea

    discharge of cerebrospinal fluid through the ear structures.

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.

ICD-9-CM
908.6 Late eff complic trauma
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 T79.8XXSOverview

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, 2025 through September 30, 2026.

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 913, 914, with relative weights from 0.8855 to 1.6346 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.

What is the ICD-9 equivalent of T79.8XXS?

Under the General Equivalence Mappings, other early complications of trauma, sequela converts to ICD-9-CM 908.6 (late eff complic trauma). 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.