2026 ICD-10-CM Diagnosis Code T84.9XXSUnspecified complication of internal orthopedic prosthetic device, implant and graft, sequela

ICD-10-CM Codes›S00–T88›T80-T88›T84

ICD-10-CM T84.9XXS
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T84.9XXS is a billable ICD-10-CM diagnosis code for unspecified complication of internal orthopedic prosthetic device, implant and graft, 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 complication associated with musculoskeletal implant. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication, sequela.

Code Identity

ICD-10-CM Code
T84.9XXS
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified complication of internal orthopedic prosthetic device, implant and graft, sequela
Short Description
Unsp comp of internal orthopedic prosth dev/grft, sequela
Parent Code
T84.9
Unspecified complication of internal orthopedic prosthetic device, implant and graft

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT80-T88Complications of surgical and medical care, not elsewhere classified
CategoryT84Complications of internal orthopedic prosthetic devices, implants and grafts
This CodeT84.9XXSUnspecified complication of internal orthopedic prosthetic device, implant and graft, sequela

Present on Admission (POA)Billing

T84.9XXS 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.

  • Complication associated with musculoskeletal implant
  • Complication associated with orthopedic device
  • Disorder of cartilage graft
  • Disorder of muscle graft
  • Disorder of prosthetic joint
  • Disorder of tendon graft
  • Disorder of tendon repair
  • Failure of tendon graft

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Complications of internal orthopedic prosthetic devices, implants and grafts (T84). 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 T84.9XXS 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 HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About T84.9XXSOverview

Is T84.9XXS a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified complication of internal orthopedic prosthetic device, implant and graft, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in T84.9XXS mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the unspecified complication of internal orthopedic prosthetic device, implant and graft itself has resolved, not the original event.

What MS-DRG does T84.9XXS group to?

When unspecified complication of internal orthopedic prosthetic device, implant and graft, 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 T84.9XXS 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 unspecified complication of internal orthopedic prosthetic device, implant and graft, sequela on inpatient claims.

What is the ICD-9 equivalent of T84.9XXS?

Under the General Equivalence Mappings, unspecified complication of internal orthopedic prosthetic device, implant and graft, sequela converts to ICD-9-CM 909.3 (late eff surg/med compl). The mapping is approximate, so confirm the match fits the documentation.