T84.611D Infection and inflammatory reaction due to internal fixation device of left humerus, subsequent encounter

ICD-10-CM T84.611D: Infection and inflammatory reaction due to internal fixation device of left humerus, subsequent encounter

ICD-10-CM code T84.611D identifies an infection and inflammatory reaction due to an internal fixation device of the left humerus during a subsequent encounter. The code belongs to the T84 category for complications of internal orthopedic prosthetic devices, implants, and grafts. It is distinct from initial encounter and sequela codes, and it appears in Medicare billing and coding articles. 3 4 6

Plain-language overview

Code T84.611D represents an infection and inflammatory reaction due to an internal fixation device of the left humerus during a subsequent encounter. This diagnosis code is listed within the T84 category for complications of internal orthopedic prosthetic devices, implants, and grafts. 3 4

What this code represents

The seventh character D in T84.611D specifies a subsequent encounter for this left humerus infection. This distinguishes it from T84.611A, which uses the seventh character A to designate the initial encounter for the same condition. 4 6

Coding details

The code T84.611D provides specific anatomical laterality for the internal fixation device complication by identifying the left humerus. Related codes in the same category specify complications for other left arm bones, including the left radius and left ulna. 4 5

Documentation considerations

The official display label for T84.611D specifies an infection and inflammatory reaction due to an internal fixation device of the left humerus, subsequent encounter. The code T84.619D exists for infections due to internal fixation devices of an unspecified bone of the arm. 3 4

Coverage and utilization context

The Centers for Medicare and Medicaid Services includes the diagnosis code T84.611D in a billing and coding article concerning molecular syndromic panels for infectious disease pathogen identification testing. The article lists this code alongside ICD-10-CM diagnosis codes. 3

What the sources add

A study of fracture-related infections identified patient claims using the broader ICD-10 code T84.6 for infection and inflammatory reaction due to an internal fixation device. This research analyzed infections following closed or open reduction and internal fixation of the proximal humerus. 2

Clinical research notes that unremoved internal fixation devices may cause strain forces resulting in an inflammatory reaction around the steel plate. The study states that removing the internal fixation device eliminated this strain force and decreased inflammatory indexes significantly. 1

The Swedish insurance claims study identified the broader T84.6 code by matching it with fracture codes and procedural fixation codes in a patient database. In contrast, the CMS article lists the highly specific T84.611D code for billing and coding purposes. 2 3

Clinical context

Research on fracture-related infections following internal fixation of the proximal humerus indicates that Cutibacterium species are pathogens in these infections. The study states these organisms appear as either monomicrobial infections or in combination with CoNS as polymicrobial infections. 2

Sources

1. Clinical effect of minimally invasive technique of internal fixation device removal in patients with healed long tubular bone fractures — pmc.ncbi.nlm.nih.gov; accessed 2026-07-25.
2. Analysis of fracture-related infections from Swedish insurance claims between 2011 and 2021 — pmc.ncbi.nlm.nih.gov; accessed 2026-07-25.
3. Article - Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing (A58747) — cms.gov; accessed 2026-07-25.
4. ICD-10-CM 2024 | T84 - Complications of internal orthopedic prosthetic devices, implants and grafts — unboundmedicine.com; accessed 2026-07-25.
5. Medical Billing Code Search — app.drchrono.com; accessed 2026-07-25.
6. T84.611A — Infection and inflammatory reaction due to internal fixation device of left humerus, initial encounter | ICD-10 Code · Eleplan — eleplan.com; accessed 2026-07-25.