2026 ICD-10-CM Diagnosis Code T79.2XXATraumatic secondary and recurrent hemorrhage and seroma, initial encounter

ICD-10-CM Codes›S00–T88›T79›T79

ICD-10-CM T79.2XXA
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T79.2XXA is a billable ICD-10-CM diagnosis code for traumatic secondary and recurrent hemorrhage and seroma, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. 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, 963 through 965. Coders also document this condition as early complication of trauma. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified injury.

Code Identity

ICD-10-CM Code
T79.2XXA
Billable Status
Yes — Valid for Submission
Code Describes
Traumatic secondary and recurrent hemorrhage and seroma, initial encounter
Short Description
Traumatic secondary and recurrent hemor and seroma, init
Parent Code
T79.2
Traumatic secondary and recurrent hemorrhage and seroma

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 CodeT79.2XXATraumatic secondary and recurrent hemorrhage and seroma, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Early complication of trauma
  • Secondary and recurrent hemorrhage
  • Secondary AND/OR recurrent hemorrhage as early complication of trauma
  • Secondary hemorrhage
  • Seroma
  • Seroma due to trauma

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 INJ026
Other specified injury
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Seroma

    tumor-like sterile accumulation of serum in a tissue, organ, or cavity. it results from a tissue insult and is the product of tissue inflammation. it most commonly occurs following mastectomy.

  • Mastectomy

    surgical procedure to remove one or both breasts.

  • Grade 1 Seroma, CTCAE|Grade 1 Seroma|Grade 1 Seroma

    symptomatic; simple aspiration indicated

  • Grade 2 Seroma, CTCAE|Grade 2 Seroma|Grade 2 Seroma

    symptomatic, elective invasive intervention indicated

  • Grade 3 Seroma, CTCAE|Grade 3 Seroma|Grade 3 Seroma

    a finding of leakage due to breakdown of an anastomosis (surgical connection of two separate anatomic structures) in the small bowel.

  • Seroma, CTCAE|Seroma|Seroma|Seroma

    asymptomatic; clinical or diagnostic observations only; intervention not indicated

  • Grade 1 Seroma, CTCAE|Grade 1 Seroma|Grade 1 Seroma

    asymptomatic; clinical or diagnostic observations only; intervention not indicated

  • Grade 2 Seroma, CTCAE|Grade 2 Seroma|Grade 2 Seroma

    symptomatic; simple aspiration indicated

  • Grade 3 Seroma, CTCAE|Grade 3 Seroma|Grade 3 Seroma

    symptomatic, elective invasive intervention indicated

  • Seroma

    a collection of serum in the body.

  • Seroma, CTCAE|Seroma|Seroma|Seroma

    a finding of tumor-like collection of serum in the tissues.

Convert T79.2XXA to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
958.2 Secondary/recur hemorr
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 T79.2XXAOverview

Is T79.2XXA (Traumatic secondary and recurrent hemorrhage and seroma) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report traumatic secondary and recurrent hemorrhage and seroma, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character A in T79.2XXA mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for traumatic secondary and recurrent hemorrhage and seroma, such as an emergency visit or first evaluation.

What MS-DRG does T79.2XXA group to?

When traumatic secondary and recurrent hemorrhage and seroma, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 922, 923, 963, 964, 965, with relative weights from 0.9405 to 2.7338 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of T79.2XXA?

Under the General Equivalence Mappings, traumatic secondary and recurrent hemorrhage and seroma, initial encounter converts to ICD-9-CM 958.2 (secondary/recur hemorr). 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.