T84.03
Mechanical loosening of internal prosthetic joint
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 4 never code together
T84code
Excludes2 — not included here, but the patient may have both. Code both when documented.
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 4
T84.03code
Inclusion terms
- Aseptic loosening of prosthetic joint
S00-T88chapter
Notes
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
Use additional code
- code to identify any retained foreign body, if applicable (Z18.-)Z18.-
Index entries leading here 1
Alongside this code 5 same parent — T84.0
T84.01 Broken internal joint prosthesis category T84.02 Dislocation of internal joint prosthesis category T84.05 Periprosthetic osteolysis of internal prosthetic joint category T84.06 Wear of articular bearing surface of internal prosth joint category T84.09 Other mechanical complication of internal joint prosthesis category
Subordinate codes 6
T84.030 Mechanical loosening of internal right hip prosthetic joint T84.031 Mechanical loosening of internal left hip prosthetic joint T84.032 Mechanical loosening of internal right knee prosthetic joint T84.033 Mechanical loosening of internal left knee prosthetic joint T84.038 Mechanical loosening of other internal prosthetic joint T84.039 Mechanical loosening of unsp internal prosthetic joint
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.