2026 ICD-10-CM Diagnosis Code T84.59XSInfection and inflammatory reaction due to other internal joint prosthesis, sequela

ICD-10-CM Codes›S00–T88›T80-T88›T84

ICD-10-CM T84.59XS
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T84.59XS is a billable ICD-10-CM diagnosis code for infection and inflammatory reaction due to other internal joint prosthesis, 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication, sequela.

Code Identity

ICD-10-CM Code
T84.59XS
Billable Status
Yes — Valid for Submission
Code Describes
Infection and inflammatory reaction due to other internal joint prosthesis, sequela
Short Description
Infect/inflm reaction due to oth int joint prosth, sequela
Parent Code
T84.59
Infection and inflammatory reaction due to other internal joint prosthesis

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 CodeT84.59XSInfection and inflammatory reaction due to other internal joint prosthesis, sequela

Present on Admission (POA)Billing

T84.59XS 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.

  • Arthritis of temporomandibular joint caused by internal joint prosthesis
  • Infection associated with prosthesis of hip joint
  • Infection associated with prosthesis of left ankle joint
  • Infection associated with prosthesis of left elbow joint
  • Infection associated with prosthesis of left shoulder joint
  • Infection associated with prosthesis of right ankle joint
  • Infection associated with prosthesis of right elbow joint
  • Infection associated with prosthesis of right shoulder joint
  • Infection associated with prosthetic joint of left wrist region
  • Infection associated with prosthetic joint of right wrist region
  • Infection associated with prosthetic joint of wrist region
  • Infection of total ankle joint prosthesis
  • Infection of total hip joint prosthesis
  • Infection of total knee joint prosthesis
  • Infection of total shoulder joint prosthesis
  • Infection of unicondylar knee joint prosthesis
  • Infectious arthritis of temporomandibular joint
  • Infectious arthritis of temporomandibular joint caused by internal joint prosthesis

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

Patient EducationClinical

Joint Disorders

Your joints are places where two or more bones come together. Your shoulders, elbows, hips, knees, and knuckles are all joints. Your spine has joints, too.

The full article covers:

  • What are joints?
  • What are joint disorders?
  • What diseases can affect the joints?
  • What types of joint disorders happen from sudden injuries?
  • What types of joint disorders happen from overuse?
  • How can I keep my joints healthy?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert T84.59XS 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 T84.59XSOverview

Is T84.59XS a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report infection and inflammatory reaction due to other internal joint prosthesis, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in T84.59XS mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the infection and inflammatory reaction due to other internal joint prosthesis itself has resolved, not the original event.

What MS-DRG does T84.59XS group to?

When infection and inflammatory reaction due to other internal joint prosthesis, 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 T84.59XS 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 infection and inflammatory reaction due to other internal joint prosthesis, sequela on inpatient claims.

What is the ICD-9 equivalent of T84.59XS?

Under the General Equivalence Mappings, infection and inflammatory reaction due to other internal joint prosthesis, sequela converts to ICD-9-CM 909.3 (late eff surg/med compl). The mapping is approximate, so confirm the match fits the documentation.