2026 ICD-10-CM Diagnosis Code T82.198SOther mechanical complication of other cardiac electronic device, sequela

ICD-10-CM Codes›S00–T88›T80-T88›T82

ICD-10-CM T82.198S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T82.198S is a billable ICD-10-CM diagnosis code for other mechanical complication of other cardiac electronic device, 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
T82.198S
Billable Status
Yes — Valid for Submission
Code Describes
Other mechanical complication of other cardiac electronic device, sequela
Short Description
Mech compl of other cardiac electronic device, sequela
Parent Code
T82.198
Other mechanical complication of other cardiac electronic device

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 CodeT82.198SOther mechanical complication of other cardiac electronic device, sequela

Present on Admission (POA)Billing

T82.198S 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.

  • Cardiac pacemaker twiddler syndrome
  • Disorder of defibrillator function
  • Disorder of implantable defibrillator
  • High threshold for implanted defibrillator
  • High voltage component dysfunction of implantable cardioverter defibrillator
  • Implantable cardioverter battery end of life
  • Implantable cardioverter defibrillator battery elective replacement required
  • Implantable cardioverter defibrillator generator dysfunction
  • Implantable cardioverter defibrillator ventricular lead fracture
  • Inappropriate implantable cardioverter shock
  • Inappropriate shocks from implanted defibrillator
  • Inappropriate withholding of pacing by implantable cardioverter defibrillator
  • Malfunction of automatic implantable cardioverter defibrillator
  • Malfunction of implantable defibrillator ventricular lead
  • Mechanical malfunction of biventricular automatic implantable cardioverter defibrillator

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

Patient EducationClinical

Pacemakers and Implantable Defibrillators

An arrhythmia is any disorder of your heart rate or rhythm. It means that your heart beats too quickly, too slowly, or with an irregular pattern. Most arrhythmias result from problems in the electrical system of the heart. If your arrhythmia is serious, you may need a cardiac pacemaker or an implantable cardioverter defibrillator (ICD).

Read the full article at MedlinePlus

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

Convert T82.198S 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 T82.198SOverview

Is T82.198S a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other mechanical complication of other cardiac electronic device, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in T82.198S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the other mechanical complication of other cardiac electronic device itself has resolved, not the original event.

What MS-DRG does T82.198S group to?

When other mechanical complication of other cardiac electronic device, 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 T82.198S 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 mechanical complication of other cardiac electronic device, sequela on inpatient claims.

What is the ICD-9 equivalent of T82.198S?

Under the General Equivalence Mappings, other mechanical complication of other cardiac electronic device, sequela converts to ICD-9-CM 909.3 (late eff surg/med compl). The mapping is approximate, so confirm the match fits the documentation.