ICD-10-CM 2027 diagnosis code
T84.05Periprosthetic osteolysis of internal prosthetic joint
T84.05 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.
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 T84.05
T84.05 is the ICD-10-CM diagnosis code for Periprosthetic osteolysis of internal prosthetic joint. 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 T84.0 (mechanical complication of internal joint prosthesis), T84.05 is specifically for Periprosthetic osteolysis of internal prosthetic joint. Related codes cover broken internal joint prosthesis (T84.01), dislocation of internal joint prosthesis (T84.02), mechanical loosening of internal prosthetic joint (T84.03), wear of articular bearing surface of internal prosthetic joint (T84.06) and other mechanical complication of internal joint prosthesis (T84.09).
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 major osseous defect, if applicable (M89.7-).
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
- T84.050Periprosthetic 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
- Ainitial encounter
- Dsubsequent encounter
- Ssequela
Coding notes
- code to identify major osseous defect, if applicable (M89.7-)
Notes that apply from higher levels
Instructions written at a parent level also apply to T84.05.
Alphabetic index entries
4 entriesTerms in the official ICD-10-CM index that lead to T84.05.
- Complication (s) (from) (of) › joint prosthesis, internal › mechanical › osteolysis › hip
- Complication (s) (from) (of) › joint prosthesis, internal › mechanical › osteolysis › knee
- Complication (s) (from) (of) › joint prosthesis, internal › mechanical › periprosthetic osteolysis, by site
- Disease, diseased › polyethylene
Codes whose notes reference T84.05
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 T84.05
Is T84.05 billable?
- No. T84.05 is a header code. Report one of its more specific subcodes instead.