2026 ICD-10-CM Diagnosis Code T82.855SStenosis of coronary artery stent, sequela

ICD-10-CM Codes›S00–T88›T80-T88›T82

ICD-10-CM T82.855S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T82.855S is a billable ICD-10-CM diagnosis code for stenosis of coronary artery stent, 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. Coders also document this condition as coronary stent patency - finding. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication, sequela.

Code Identity

ICD-10-CM Code
T82.855S
Billable Status
Yes — Valid for Submission
Code Describes
Stenosis of coronary artery stent, sequela
Short Description
Stenosis of coronary artery stent, sequela
Same as the full description in the CMS dataset.
Parent Code
T82.855
Stenosis of coronary artery stent

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 CodeT82.855SStenosis of coronary artery stent, sequela

Present on Admission (POA)Billing

T82.855S 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.

  • Coronary stent patency - finding
  • Restenosis of coronary artery following insertion of stent into coronary artery
  • Restenosis of coronary artery stent

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

Convert T82.855S 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 History & ChangesHistory

Replacement T82.855S replaces the following previously assigned code(s):

  • T82.857S - Stenosis of cardiac prosth dev/grft, sequela
  • T82.857S - Stenosis of other cardiac prosth dev/grft, sequela
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About T82.855SOverview

Is T82.855S (Stenosis of coronary artery stent) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report stenosis of coronary artery stent, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in T82.855S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the stenosis of coronary artery stent itself has resolved, not the original event.

What MS-DRG does T82.855S group to?

When stenosis of coronary artery stent, 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 T82.855S 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 stenosis of coronary artery stent, sequela on inpatient claims.

What is the ICD-9 equivalent of T82.855S?

Under the General Equivalence Mappings, stenosis of coronary artery stent, sequela converts to ICD-9-CM 909.3 (late eff surg/med compl). The mapping is approximate, so confirm the match fits the documentation.