T78.41XA: Arthus phenomenon, initial encounter
T78.41XA is a billable, specific ICD-10-CM code for arthus phenomenon, initial encounter. It is valid for submission on a claim.
Check T78.41XA with the rest of the claim: free scrubber7th character "A": initial encounter
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
Excludes1 inherited from the categories above T78.41XA
A category’s note binds every code beneath it.
Written on T78.4: Other and unspecified allergy
Excludes2 inherited from the categories above T78.41XA
Not part of this code, but both may be coded when both are present.
Other codes that can never be billed with T78.41XA
Their own Excludes1 notes name this code, so the conflict is not listed above.
- T75Other and unspecified effects of other external causes
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
T78.41XA is named in 1 Medicare coverage policy: 1 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A57361Billing and Coding: Monitored Anesthesia Care
Code history
Unchanged in every release from FY2024 to FY2027.