2026 ICD-10-CM Diagnosis Code T84.051SPeriprosthetic osteolysis of internal prosthetic left hip joint, sequela
T84.051S is a billable ICD-10-CM diagnosis code for periprosthetic osteolysis of internal prosthetic left hip joint, 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 osteolysis following surgical procedure on skeletal system. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
T84.051S 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.
- Osteolysis following surgical procedure on skeletal system
- Osteolysis of bone adjacent to hip joint prosthesis
- Osteolysis of bone adjacent to left hip joint prosthesis
- Periprosthetic osteolysis
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
Hip Replacement
Hip replacement is surgery for people with severe hip damage. The most common cause of damage is osteoarthritis. Osteoarthritis causes pain, swelling, and reduced motion in your joints. It can interfere with your daily activities.
Read the full article at MedlinePlus
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Convert T84.051S to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T84.051SOverview
Is T84.051S a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report periprosthetic osteolysis of internal prosthetic left hip joint, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in T84.051S mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the periprosthetic osteolysis of internal prosthetic left hip joint itself has resolved, not the original event.
What MS-DRG does T84.051S group to?
When periprosthetic osteolysis of internal prosthetic left hip joint, 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 T84.051S 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 periprosthetic osteolysis of internal prosthetic left hip joint, sequela on inpatient claims.
What is the ICD-9 equivalent of T84.051S?
Under the General Equivalence Mappings, periprosthetic osteolysis of internal prosthetic left hip joint, sequela converts to ICD-9-CM 909.3 (late eff surg/med compl). The mapping is approximate, so confirm the match fits the documentation.
