2026 ICD-10-CM Diagnosis Code T82.118ABreakdown (mechanical) of other cardiac electronic device, initial encounter
T82.118A is a billable ICD-10-CM diagnosis code for breakdown (mechanical) of other cardiac electronic device, 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
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Breakage of atrial insulation of implantable cardioverter and defibrillator
- Disorder of implanted defibrillator generator
- Fracture of atrial lead of implantable cardioverter and defibrillator
- Implantable cardioverter defibrillator ventricular lead insulation break
- Implanted defibrillator generator failure
- Malfunction of automatic implantable cardioverter defibrillator
- Malfunction of biventricular automatic implantable cardioverter defibrillator
- Malfunction of biventricular automatic implantable cardioverter defibrillator generator
- Malfunction of biventricular cardiac pacemaker
- Malfunction of cardiac pacemaker
- Malfunction of implantable defibrillator ventricular lead
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.
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 T82.118A to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T82.118AOverview
Is T82.118A (Breakdown (mechanical) of other cardiac electronic device) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report breakdown (mechanical) of other cardiac electronic device, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T82.118A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for breakdown (mechanical) of other cardiac electronic device, such as an emergency visit or first evaluation.
What MS-DRG does T82.118A group to?
When breakdown (mechanical) of other cardiac electronic device, 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 T82.118A?
Under the General Equivalence Mappings, breakdown (mechanical) of other cardiac electronic device, initial encounter converts to ICD-9-CM 996.09 (malfunc card dev/grf NEC). The mapping is approximate, so confirm the match fits the documentation.
