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T20.73XS

T20.73XSCorrosion of third degree of chin, sequela

Billable / specific codeICD-10-CMPOA exempt

T20.73XS is a billable, specific ICD-10-CM code for corrosion of third degree of chin, sequela. It is valid for submission on a claim.

7th character "S" — sequela

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

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

T20.73XS 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

T20.73XS is named in 8 Medicare coverage policies 8 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A53057Billing and Coding: Home Health Occupational Therapy
  • A53058Billing and Coding: Home Health Physical Therapy
  • A53064Billing and Coding: Outpatient Occupational Therapy
  • A53065Billing and Coding: Outpatient Physical Therapy

Related codes at this level

Codes that share T20.73. If T20.73XS is not quite right, the correct code is usually one of these.

Questions about T20.73XS

Is T20.73XS a billable ICD-10-CM code?
Yes. T20.73XS is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does T20.73XS 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.