T84.191S Other mechanical complication of internal fixation device of left humerus, sequela

ICD-10-CM T84.191S: Other mechanical complication of internal fixation device of left humerus, sequela

ICD-10-CM code T84.191S identifies a sequela involving an other mechanical complication of an internal fixation device of the left humerus. The terminology record is active and classifies the concept as an injury or poisoning. It appears in official code lists and research mappings, though sources do not establish specific payer coverage rules. 1 3 4

Plain-language overview

This diagnosis code represents a sequela involving an other mechanical complication of an internal fixation device placed in the left humerus, and its semantic type is classified as an injury or poisoning. 1

What this code represents

The official display label for T84.191S is other mechanical complication of internal fixation device of left humerus, sequela, and the record status is active. 1

The parent concept for this specific diagnosis code is T84.191, which is the broader category for other mechanical complication of internal fixation device of left humerus. 1

Coding details

The terminology record for T84.191S is active for the 2026 version of ICD-10-CM and includes an abbreviation for mechanical complication of internal fixation of left humerus, sequela. 1

Official code lists include distinct codes for initial encounters, subsequent encounters, and sequelae of other mechanical complications of internal fixation devices of the left humerus. 3

Documentation considerations

The terminology record specifies the left humerus as the anatomical site and includes a sequela encounter character, while the phecode list distinguishes this sequela from initial and subsequent encounters. 1 3

Coverage and utilization context

The code T84.191S appears in an official MS-DRG definitions manual and a phecode mapping system, but these sources do not establish that a code guarantees reimbursement or specific payer coverage. 3 4

What the sources add

While the terminology record defines the diagnosis, a separate biomechanical study establishes that internal fixation of distal humerus fractures has a postoperative complication rate as high as thirty-four percent. 1 2

Comparing the sources reveals that the terminology record provides the official code definition, whereas the biomechanical study provides clinical context regarding fixation stability and postoperative complications for distal humerus fractures. 1 2

Sources

1. ICD-10-CM T84.191S terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Evaluation of internal fixation stability of distal humerus C-type fractures based on musculoskeletal dynamics: finite element analysis under dynamic loading — pmc.ncbi.nlm.nih.gov; accessed 2026-07-27.
3. Phecode 858 · ExPRSweb — csg.sph.umich.edu; accessed 2026-07-27.
4. ICD-10-CM/PCS MS-DRGv33 Definitions Manual — cms.gov; accessed 2026-07-27.