MCMCB Pro
T80.52XD

T80.52XDAnaphylactic reaction due to vaccination, subsequent encounter

Billable / specific codeICD-10-CMPOA exempt

T80.52XD is a billable, specific ICD-10-CM code for anaphylactic reaction due to vaccination, 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 T80

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

T80.52XD 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

T80.52XD is named in 13 Medicare coverage policies 13 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A53058Billing and Coding: Home Health Physical Therapy
  • A53065Billing and Coding: Outpatient Physical Therapy
  • A56538Billing and Coding: Allergen Immunotherapy
  • A56558Billing and Coding: Allergy Testing

Related codes at this level

Codes that share T80.52. If T80.52XD is not quite right, the correct code is usually one of these.

Questions about T80.52XD

Is T80.52XD a billable ICD-10-CM code?
Yes. T80.52XD is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does T80.52XD 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.