2026 ICD-10-CM Diagnosis Code T82.6XXAInfection and inflammatory reaction due to cardiac valve prosthesis, initial encounter

ICD-10-CM Codes›S00–T88›T80-T88›T82

ICD-10-CM T82.6XXA
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T82.6XXA is a billable ICD-10-CM diagnosis code for infection and inflammatory reaction due to cardiac valve prosthesis, 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 314 through 316. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication of cardiovascular device, implant or graft, initial encounter.

Code Identity

ICD-10-CM Code
T82.6XXA
Billable Status
Yes — Valid for Submission
Code Describes
Infection and inflammatory reaction due to cardiac valve prosthesis, initial encounter
Short Description
Infect/inflm reaction due to cardiac valve prosthesis, init
Parent Code
T82.6
Infection and inflammatory reaction due to cardiac valve prosthesis

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT80-T88Complications of surgical and medical care, not elsewhere classified
CategoryT82Complications of cardiac and vascular prosthetic devices, implants and grafts
This CodeT82.6XXAInfection and inflammatory reaction due to cardiac valve prosthesis, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abscess at site of cardiac valve prosthesis
  • Disorder of aortic valve prosthesis
  • Disorder of mitral valve prosthesis
  • Disorder of tricuspid valve prosthesis
  • Endocarditis of prosthetic aortic valve
  • Endocarditis of prosthetic mitral valve
  • Endocarditis of prosthetic tricuspid valve
  • Infection associated with cardiac implant
  • Inflammation associated with cardiac implant
  • Inflammation of aortic valve
  • Prosthetic cardiac valve vegetation
  • Prosthetic valve endocarditis
  • Vegetation of heart

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Complications of cardiac and vascular prosthetic devices, implants and grafts (T82). 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 INJ033
Complication of cardiovascular device, implant or graft, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Early Prosthetic Valve Endocarditis

    prosthetic valve endocarditis that occurs days to weeks after surgery.

  • Late Prosthetic Valve Endocarditis

    prosthetic valve endocarditis that occurs several months to years following valve replacement.

  • Prosthetic Valve Endocarditis

    endocarditis occurring on parts of a valve prosthesis or a reconstructed heart valve; it can be classified into early and late prosthetic valve endocarditis.

Patient EducationClinical

Heart Valve Diseases

Heart valve disease happens when one or more of your heart valves don't work well.

The full article covers:

  • What are heart valve diseases?
  • What are the types of heart valve diseases?
  • What causes heart valve diseases?
  • Who is more likely to develop heart valve diseases?
  • What are the symptoms of heart valve diseases?
  • What other problems can heart valve diseases cause?
  • How is heart valve disease diagnosed?
  • What are the treatments for heart valve diseases?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert T82.6XXA to ICD-9-CMHistory

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

ICD-9-CM
996.61 React-cardiac dev/graft
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 T82.6XXAOverview

Is T82.6XXA a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report infection and inflammatory reaction due to cardiac valve prosthesis, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character A in T82.6XXA mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for infection and inflammatory reaction due to cardiac valve prosthesis, such as an emergency visit or first evaluation.

What MS-DRG does T82.6XXA group to?

When infection and inflammatory reaction due to cardiac valve prosthesis, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 314, 315, 316, with relative weights from 0.6821 to 2.0852 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of T82.6XXA?

Under the General Equivalence Mappings, infection and inflammatory reaction due to cardiac valve prosthesis, initial encounter converts to ICD-9-CM 996.61 (react-cardiac dev/graft). The mapping is approximate, so confirm the match fits the documentation.