ICD-10-CM 2027 diagnosis code
T84.5Infection and inflammatory reaction due to internal joint prosthesis
T84.5 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it and add the required 7th character.Short description: Infect/inflm reaction due to internal joint prosthesis
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About T84.5
T84.5 is the ICD-10-CM diagnosis code for infection and inflammatory reaction due to internal joint prosthesis. It belongs to category T84 (complications of internal orthopedic prosthetic devices, implants and grafts), block T80-T88 (complications of surgical and medical care, not elsewhere classified) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.
Within T84 (complications of internal orthopedic prosthetic devices, implants and grafts), T84.5 is specifically for infection and inflammatory reaction due to internal joint prosthesis. Related codes cover mechanical complication of internal joint prosthesis (T84.0), mechanical complication of internal fixation device of bones of limb (T84.1), mechanical complication of internal fixation device of other bones (T84.2), mechanical complication of other bone devices, implants and grafts (T84.3), mechanical complication of other internal orthopedic devices, implants and grafts (T84.4), infection and inflammatory reaction due to internal fixation device (T84.6), infection and inflammatory reaction due to other internal orthopedic prosthetic devices, implants and grafts (T84.7), other specified complications of internal orthopedic prosthetic devices, implants and grafts (T84.8) and 1 more.
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
Use an additional code to identify infection.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
7th character
The appropriate 7th character is to be added to each code from category T84
- T84.50Infection and inflammatory reaction due to unspecified internal joint prosthesis
- T84.51Infection and inflammatory reaction due to internal right hip prosthesis
- T84.52Infection and inflammatory reaction due to internal left hip prosthesis
- T84.53Infection and inflammatory reaction due to internal right knee prosthesis
- T84.54Infection and inflammatory reaction due to internal left knee prosthesis
- T84.59Infection and inflammatory reaction due to other internal joint prosthesis
- Ainitial encounter
- Dsubsequent encounter
- Ssequela
Coding notes
- code to identify infection
Notes that apply from higher levels
Instructions written at a parent level also apply to T84.5.
Alphabetic index entries
2 entriesTerms in the official ICD-10-CM index that lead to T84.5.
Codes whose notes reference T84.5
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about T84.5
Is T84.5 billable?
- No. T84.5 is a header code. Report one of its more specific subcodes instead.