2026 ICD-10-CM Diagnosis Code T84.018SBroken internal joint prosthesis, other site, sequela
T84.018S is a billable ICD-10-CM diagnosis code for broken internal joint prosthesis, other site, 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 breakage of joint prosthesis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
T84.018S 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.
- Breakage of joint prosthesis
- Breakage of prosthesis
- Breakage of shoulder joint prosthesis
- Periprosthetic fracture of hip
- Prosthetic joint mechanical failure
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.
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 T84.018S to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T84.018SOverview
Is T84.018S (Broken internal joint prosthesis, other site) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report broken internal joint prosthesis, other site, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in T84.018S mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the broken internal joint prosthesis, other site itself has resolved, not the original event.
What MS-DRG does T84.018S group to?
When broken internal joint prosthesis, other site, 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 T84.018S 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 broken internal joint prosthesis, other site, sequela on inpatient claims.
What is the ICD-9 equivalent of T84.018S?
Under the General Equivalence Mappings, broken internal joint prosthesis, other site, sequela converts to ICD-9-CM 909.3 (late eff surg/med compl). The mapping is approximate, so confirm the match fits the documentation.
