2026 ICD-10-CM Diagnosis Code T85.818SEmbolism due to other internal prosthetic devices, implants and grafts, sequela

ICD-10-CM Codes›S00–T88›T80-T88›T85

ICD-10-CM T85.818S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T85.818S is a billable ICD-10-CM diagnosis code for embolism due to other internal prosthetic devices, implants and grafts, 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 embolism due to any device, implant AND/OR graft. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication, sequela.

Code Identity

ICD-10-CM Code
T85.818S
Billable Status
Yes — Valid for Submission
Code Describes
Embolism due to other internal prosthetic devices, implants and grafts, sequela
Short Description
Embolism due to other internal prosth dev/grft, sequela
Parent Code
T85.818
Embolism due to other internal prosthetic devices, implants and grafts

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT80-T88Complications of surgical and medical care, not elsewhere classified
CategoryT85Complications of other internal prosthetic devices, implants and grafts
This CodeT85.818SEmbolism due to other internal prosthetic devices, implants and grafts, sequela

Present on Admission (POA)Billing

T85.818S 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.

  • Embolism due to any device, implant AND/OR graft
  • Internal prosthetic device causing embolism

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Complications of other internal prosthetic devices, implants and grafts (T85). 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 T85.818S 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 T85.818S replaces the following previously assigned code(s):

  • T85.81XS - Embolism due to internal prosth dev/grft, NEC, 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 T85.818SOverview

Is T85.818S a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report embolism due to other internal prosthetic devices, implants and grafts, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in T85.818S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the embolism due to other internal prosthetic devices, implants and grafts itself has resolved, not the original event.

What MS-DRG does T85.818S group to?

When embolism due to other internal prosthetic devices, implants and grafts, 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 T85.818S 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 embolism due to other internal prosthetic devices, implants and grafts, sequela on inpatient claims.

What is the ICD-9 equivalent of T85.818S?

Under the General Equivalence Mappings, embolism due to other internal prosthetic devices, implants and grafts, sequela converts to ICD-9-CM 909.3 (late eff surg/med compl). The mapping is approximate, so confirm the match fits the documentation.