MCMCB Pro
T84.54XA

T84.54XAInfection and inflammatory reaction due to internal left knee prosthesis, initial encounter

Billable / specific codeICD-10-CMleft

T84.54XA is a billable, specific ICD-10-CM code for infection and inflammatory reaction due to internal left knee prosthesis, initial encounter. It is valid for submission on a claim.

7th character "A" — initial encounter

The appropriate 7th character is to be added to each code from category T84

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

T84.54XA does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

T84.54XA is named in 18 Medicare coverage policies 18 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A52465Knee Orthoses - Policy Article
  • A52465Knee Orthoses - Policy Article
  • A52868Billing and Coding: Transesophageal Echocardiography (TEE)
  • A56777Billing and Coding: Total Joint Arthroplasty

Related codes at this level

Codes that share T84.54. If T84.54XA is not quite right, the correct code is usually one of these.

Questions about T84.54XA

Is T84.54XA a billable ICD-10-CM code?
Yes. T84.54XA is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does T84.54XA sit in the tabular list?
Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Complications of surgical and medical care, not elsewhere classified (T80-T88).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.