T78.3XXA
T78.3XXA — Angioneurotic edema, initial encounter
Billable / specific codeICD-10-CM
T78.3XXA is a billable, specific ICD-10-CM code for angioneurotic edema, initial encounter. It is valid for submission on a claim.
7th 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
Risk adjustment
T78.3XXA 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
T78.3XXA is named in 22 Medicare coverage policies — 22 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56558Billing and Coding: Allergy Testing
- A56612Billing and Coding: CT of the Head
- A56625Billing and Coding: Echocardiography
- A56625Billing and Coding: Echocardiography
Related codes at this level
Codes that share T78.3. If T78.3XXA is not quite right, the correct code is usually one of these.
Questions about T78.3XXA
- Is T78.3XXA a billable ICD-10-CM code?
- Yes. T78.3XXA is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does T78.3XXA 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).
- What cannot be coded together with T78.3XXA?
- T78.3XXA carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.