MCMCB Pro
T20.54XD

T20.54XDCorrosion of first degree of nose (septum), subsequent encounter

Billable / specific codeICD-10-CMPOA exempt

T20.54XD is a billable, specific ICD-10-CM code for corrosion of first degree of nose (septum), subsequent encounter. It is valid for submission on a claim.

7th character "D" — subsequent encounter

The appropriate 7th character is to be added to each code from category T20

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

T20.54XD 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

T20.54XD is named in 2 Medicare coverage policies 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A57204Billing and Coding: MRI and CT Scans of the Head and Neck
  • A59186Billing and Coding: Magnesium

Related codes at this level

Codes that share T20.54. If T20.54XD is not quite right, the correct code is usually one of these.

Questions about T20.54XD

Is T20.54XD a billable ICD-10-CM code?
Yes. T20.54XD is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does T20.54XD sit in the tabular list?
Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Burns and corrosions of external body surface, specified by site (T20-T25).
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.