ICD-10-CM 2027 diagnosis code
T84.0Mechanical complication of internal joint prosthesis
T84.0 is a header code, so it can't be reported by itself. Choose one of the 7 more specific codes beneath it and add the required 7th character.
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 T84.0
T84.0 is the ICD-10-CM diagnosis code for mechanical complication of 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 7 subcodes must be used instead.
Within T84 (complications of internal orthopedic prosthetic devices, implants and grafts), T84.0 is specifically for mechanical complication of internal joint prosthesis. Related codes cover 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 joint prosthesis (T84.5), 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.
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
- T84.01Broken internal joint prosthesis
- T84.02Dislocation of internal joint prosthesis
- T84.020Dislocation of internal right hip prosthesis
- T84.021Dislocation of internal left hip prosthesis
- T84.022Instability of internal right knee prosthesis
- T84.023Instability of internal left knee prosthesis
- T84.028Dislocation of other internal joint prosthesis
- T84.029Dislocation of unspecified internal joint prosthesis
- T84.03Mechanical loosening of internal prosthetic joint
- T84.030Mechanical loosening of internal right hip prosthetic joint
- T84.031Mechanical loosening of internal left hip prosthetic joint
- T84.032Mechanical loosening of internal right knee prosthetic joint
- T84.033Mechanical loosening of internal left knee prosthetic joint
- T84.038Mechanical loosening of other internal prosthetic joint
- T84.039Mechanical loosening of unspecified internal prosthetic joint
- T84.04Periprosthetic fracture around internal prosthetic joint
- T84.05Periprosthetic osteolysis of internal prosthetic joint
- T84.050Periprosthetic osteolysis of internal prosthetic right hip joint
- T84.051Periprosthetic osteolysis of internal prosthetic left hip joint
- T84.052Periprosthetic osteolysis of internal prosthetic right knee joint
- T84.053Periprosthetic osteolysis of internal prosthetic left knee joint
- T84.058Periprosthetic osteolysis of other internal prosthetic joint
- T84.059Periprosthetic osteolysis of unspecified internal prosthetic joint
- T84.06Wear of articular bearing surface of internal prosthetic joint
- T84.060Wear of articular bearing surface of internal prosthetic right hip joint
- T84.061Wear of articular bearing surface of internal prosthetic left hip joint
- T84.062Wear of articular bearing surface of internal prosthetic right knee joint
- T84.063Wear of articular bearing surface of internal prosthetic left knee joint
- T84.068Wear of articular bearing surface of other internal prosthetic joint
- T84.069Wear of articular bearing surface of unspecified internal prosthetic joint
- T84.09Other mechanical complication of internal joint prosthesis
- T84.090Other mechanical complication of internal right hip prosthesis
- T84.091Other mechanical complication of internal left hip prosthesis
- T84.092Other mechanical complication of internal right knee prosthesis
- T84.093Other mechanical complication of internal left knee prosthesis
- T84.098Other mechanical complication of other internal joint prosthesis
- T84.099Other mechanical complication of unspecified internal joint prosthesis
- Ainitial encounter
- Dsubsequent encounter
- Ssequela
Notes that apply from higher levels
Instructions written at a parent level also apply to T84.0.
Codes whose notes reference T84.0
- T81.59Excludes2
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 T84.0
Is T84.0 billable?
- No. T84.0 is a header code. Report one of its more specific subcodes instead.