Is T78.081D a billable ICD-10-CM code?

Yes. T78.081D is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does T78.081D 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 T78.081D?

T78.081D carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

T78.081D

T78.081D — Anaphylactic reaction due to egg with reactivity to baked egg, subsequent encounter

Billable / specific codeICD-10-CMPOA exempt

T78.081D is a billable, specific ICD-10-CM code for anaphylactic reaction due to egg with reactivity to baked egg, 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 T78

A: initial encounter
D: subsequent encounter
S: sequela

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

Anaphylactic reaction due to egg with tolerance to baked egg (T78.080)

Risk adjustment

T78.081D 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

T78.081D is named in 29 Medicare coverage policies — 29 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
A56558Billing and Coding: Allergy Testing
A56558Billing and Coding: Allergy Testing
A56559Billing and Coding: Allergy Skin Testing

Code history

What changed, and when. Derived by diffing consecutive CMS release files — which matters when you are defending a code assigned under an earlier edition.

addedFY2024-FY2026
Anaphylactic reaction due to egg with reactivity to baked egg, subsequent encounter

Related codes at this level

Codes that share T78.081. If T78.081D is not quite right, the correct code is usually one of these.

Questions about T78.081D

Is T78.081D a billable ICD-10-CM code?: Yes. T78.081D is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does T78.081D 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 T78.081D?: T78.081D carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.