T78.41XS — Arthus phenomenon, sequela
T78.41XS is a billable, specific ICD-10-CM code for arthus phenomenon, 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 T78
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Arthus reaction
Risk adjustment
T78.41XS 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
T78.41XS is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A57068Billing and Coding: Ocular Photography - External
- A57181Billing and Coding: Allergy Testing
- A57181Billing and Coding: Allergy Testing
- A57361Billing and Coding: Monitored Anesthesia Care
Related codes at this level
Codes that share T78.41. If T78.41XS is not quite right, the correct code is usually one of these.
Questions about T78.41XS
- Is T78.41XS a billable ICD-10-CM code?
- Yes. T78.41XS is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does T78.41XS sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Other and unspecified effects of external causes (T66-T78).