2026 ICD-10-CM Diagnosis Code T84.028SDislocation of other internal joint prosthesis, sequela

ICD-10-CM Codes›S00–T88›T80-T88›T84

ICD-10-CM T84.028S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T84.028S is a billable ICD-10-CM diagnosis code for dislocation of 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
T84.028S
Billable Status
Yes — Valid for Submission
Code Describes
Dislocation of other internal joint prosthesis, sequela
Short Description
Dislocation of other internal joint prosthesis, sequela
Same as the full description in the CMS dataset.
Parent Code
T84.028
Dislocation of 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 CodeT84.028SDislocation of other internal joint prosthesis, sequela

Present on Admission (POA)Billing

T84.028S 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.

  • Dislocation of hip joint prosthesis
  • Dislocation of knee joint prosthesis
  • Dislocation of left shoulder joint prosthesis
  • Dislocation of prosthetic joint of elbow
  • Dislocation of prosthetic joint of finger
  • Dislocation of prosthetic joint of left elbow
  • Dislocation of prosthetic joint of right elbow
  • Dislocation of right shoulder joint prosthesis
  • Dislocation of shoulder joint prosthesis
  • Instability of left shoulder joint
  • Instability of prosthesis of glenohumeral joint
  • Instability of prosthesis of joint of hip
  • Instability of prosthesis of joint of knee
  • Instability of prosthetic left shoulder joint
  • Instability of prosthetic right shoulder joint
  • Instability of right shoulder joint
  • Malposition of prosthetic joint of hip
  • Shoulder joint unstable
  • Subluxation of glenohumeral joint prosthesis
  • Subluxation of knee joint prosthesis
  • Subluxation of prosthesis of hip joint

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 T84.028S 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 T84.028SOverview

Is T84.028S (Dislocation of other internal joint prosthesis) a billable code?

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

What does the 7th character S in T84.028S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the dislocation of other internal joint prosthesis itself has resolved, not the original event.

What MS-DRG does T84.028S group to?

When dislocation of 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 T84.028S 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 dislocation of other internal joint prosthesis, sequela on inpatient claims.

What is the ICD-9 equivalent of T84.028S?

Under the General Equivalence Mappings, dislocation of 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.