2026 ICD-10-CM Diagnosis Code T82.6XXSInfection and inflammatory reaction due to cardiac valve prosthesis, sequela

ICD-10-CM Codes›S00–T88›T80-T88›T82

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

T82.6XXS is a billable ICD-10-CM diagnosis code for infection and inflammatory reaction due to cardiac valve prosthesis, 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication, sequela.

Code Identity

ICD-10-CM Code
T82.6XXS
Billable Status
Yes — Valid for Submission
Code Describes
Infection and inflammatory reaction due to cardiac valve prosthesis, sequela
Short Description
Infect/inflm reaction due to cardiac valve prosth, sequela
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 CodeT82.6XXSInfection and inflammatory reaction due to cardiac valve prosthesis, sequela

Present on Admission (POA)Billing

T82.6XXS 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.

  • 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 INJ076
Complication, sequela
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 T82.6XXS to ICD-9-CMHistory

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

ICD-9-CM
909.3 Late eff surg/med compl
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 T82.6XXSOverview

Is T82.6XXS 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, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in T82.6XXS mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the infection and inflammatory reaction due to cardiac valve prosthesis itself has resolved, not the original event.

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

When infection and inflammatory reaction due to cardiac valve prosthesis, 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 T82.6XXS 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 infection and inflammatory reaction due to cardiac valve prosthesis, sequela on inpatient claims.

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

Under the General Equivalence Mappings, infection and inflammatory reaction due to cardiac valve prosthesis, sequela converts to ICD-9-CM 909.3 (late eff surg/med compl). The mapping is approximate, so confirm the match fits the documentation.