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ICD-10-CM 2027 diagnosis code

T85.818AEmbolism due to other internal prosthetic devices, implants and grafts, initial encounter

✓ Billable / specificRequires 7th character

T85.818A is a valid, billable ICD-10-CM code for embolism due to other internal prosthetic devices, implants and grafts, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Embolism due to other internal prosth dev/grft, init

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 T85.818A

T85.818A is the ICD-10-CM diagnosis code for embolism due to other internal prosthetic devices, implants and grafts, initial encounter. It belongs to category T85 (complications of other internal 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.

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 919 (Complications of Treatment with MCC, relative weight 1.763), DRG 920 (Complications of Treatment with CC, relative weight 0.9975) and DRG 921 (Complications of Treatment without CC/MCC, relative weight 0.6722), in MDC 21 (Injuries, Poisonings and Toxic Effects of Drugs), 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 996.79 (other complications due to other internal prosthetic device, implant, and graft).

7th character

Ainitial encounter

Other encounter types for T85.818:

Notes that apply from higher levels

Instructions written at a parent level also apply to T85.818A.

› From T85 Complications of other internal 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 →
  • 996.79Other complications due to other internal prosthetic 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 T85.818A

Is T85.818A billable?

Yes. T85.818A 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 T85.818A 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 T85.818A be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict T85.818A as a principal diagnosis.

Is T85.818A a CC or MCC?

No. T85.818A is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does T85.818A group to?

T85.818A is used in the MS-DRG v44.0 logic for MS-DRG 919 (Complications of Treatment with MCC), MS-DRG 920 (Complications of Treatment with CC) and MS-DRG 921 (Complications of Treatment 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 T85.818A?

The CMS General Equivalence Mappings map T85.818A to ICD-9-CM 996.79.