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ICD-10-CM 2027 diagnosis code

T82.855AStenosis of coronary artery stent, initial encounter

✓ Billable / specificRequires 7th characterCC — complication/comorbidity

T82.855A is a valid, billable ICD-10-CM code for stenosis of coronary artery stent, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About T82.855A

T82.855A is the ICD-10-CM diagnosis code for stenosis of coronary artery stent, initial encounter. It belongs to category T82 (complications of cardiac and vascular prosthetic devices, implants and grafts), block T80-T88 (complications of surgical and medical care, not elsewhere classified) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

The 7th character "A" means initial encounter: use it while the patient is receiving active treatment for the condition.

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 314 (Other Circulatory System Diagnoses with MCC, relative weight 2.0873), DRG 315 (Other Circulatory System Diagnoses with CC, relative weight 0.9508) and DRG 316 (Other Circulatory System Diagnoses without CC/MCC, relative weight 0.6677), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It was added in FY2017, effective October 1, 2016.

Before ICD-10, this condition was coded in ICD-9-CM as 996.72 (other complications due to other cardiac device, implant, and graft).

7th character

Ainitial encounter

CC/MCC status for this injury by encounter: CC for A; Neither CC nor MCC for D, S.

Other encounter types for T82.855:

Notes that apply from higher levels

Instructions written at a parent level also apply to T82.855A.

› From T82 Complications of cardiac and vascular prosthetic devices, implants and grafts
Excludes2
  • failure and rejection of transplanted organs and tissue (T86.-)

Broader instructions also apply from T80-T88 Complications of surgical and medical care, not elsewhere classified and Chapter 19: Injury, poisoning and certain other consequences of external causes.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 996.72Other complications due to other cardiac device, implant, and graftapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2017 (effective 10/1/2016): Added
  • No changes since FY2017.

Common questions about T82.855A

Is T82.855A billable?

Yes. T82.855A is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

What does the "A" at the end of T82.855A mean?

It is the 7th character for initial encounter. Per the official guidelines, use it while the patient is receiving active treatment for the condition.

Can T82.855A be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict T82.855A as a principal diagnosis.

Is T82.855A a CC or MCC?

T82.855A is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does T82.855A group to?

T82.855A is used in the MS-DRG v44.0 logic for MS-DRG 314 (Other Circulatory System Diagnoses with MCC), MS-DRG 315 (Other Circulatory System Diagnoses with CC) and MS-DRG 316 (Other Circulatory System Diagnoses without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for T82.855A?

The CMS General Equivalence Mappings map T82.855A to ICD-9-CM 996.72.