2026 ICD-10-CM Diagnosis Code T84.623SInfection and inflammatory reaction due to internal fixation device of left tibia, sequela
T84.623S is a billable ICD-10-CM diagnosis code for infection and inflammatory reaction due to internal fixation device of left tibia, 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 infection of tibia associated with internal fixation device. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
T84.623S 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.
- Infection of tibia associated with internal fixation device
- Left tibia infection associated with internal fixation device
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
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Read the full article at MedlinePlus
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Convert T84.623S to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T84.623SOverview
Is T84.623S a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report infection and inflammatory reaction due to internal fixation device of left tibia, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in T84.623S 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 internal fixation device of left tibia itself has resolved, not the original event.
What MS-DRG does T84.623S group to?
When infection and inflammatory reaction due to internal fixation device of left tibia, 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 T84.623S 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 internal fixation device of left tibia, sequela on inpatient claims.
What is the ICD-9 equivalent of T84.623S?
Under the General Equivalence Mappings, infection and inflammatory reaction due to internal fixation device of left tibia, sequela converts to ICD-9-CM 909.3 (late eff surg/med compl). The mapping is approximate, so confirm the match fits the documentation.
