T84.091S Other mechanical complication of internal left hip prosthesis, sequela

ICD-10-CM T84.091S: Other mechanical complication of internal left hip prosthesis, sequela

ICD-10-CM code T84.091S identifies a sequela of another mechanical complication involving an internal left hip prosthesis. The terminology record classifies this concept under the semantic type of injury or poisoning. It appears in official Medicare billing and coding articles for total joint arthroplasty. 1 3 4

Plain-language overview

This diagnosis code represents a sequela involving an internal left hip prosthesis, and the official terminology record assigns it the semantic type of Injury or Poisoning. 1 4

What this code represents

The official preferred name for T84.091S is Other mechanical complication of internal left hip prosthesis, sequela, and the concept holds an active record status in the ICD-10-CM version 2026 terminology. 1

The terminology record assigns T84.091S the semantic type of Injury or Poisoning, and an alternate published abbreviation is mechanical complication of internal left hip prosthesis, sequela. 1 4

Coding details

In the ICD-10-CM hierarchy, T84.091S is a narrower concept under the parent code T84.091, which denotes other mechanical complication of internal left hip prosthesis. 1

Code T84.091S specifies the left hip and the sequela encounter, distinguishing it from initial and subsequent encounter codes for the same left hip mechanical complication. 5

Documentation considerations

The official terminology record establishes the exact preferred name and published abbreviation for T84.091S as Other mechanical complication of internal left hip prosthesis, sequela. 1

Coverage and utilization context

The code T84.091S appears in a Medicare billing and coding article for total joint arthroplasty, which lists the diagnosis code alongside other joint prosthesis complication codes. 3

What the sources add

A CMS billing article for total hip arthroplasty lists related right hip prosthesis complication codes, while a separate total joint arthroplasty article explicitly includes the left hip sequela code T84.091S. 2 3

A third-party medical billing search tool lists T84.091S among a broader group of mechanical complications for hip and knee prostheses, corroborating the official terminology record for this exact code. 1 5

Sources

1. ICD-10-CM T84.091S terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Article - Billing and Coding: Total Hip Arthroplasty (A57683) — cms.gov; accessed 2026-07-27.
3. Article - Billing and Coding: Total Joint Arthroplasty (A56777) — cms.gov; accessed 2026-07-27.
4. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
5. Medical Billing Code Search — app.drchrono.com; accessed 2026-07-27.