T46.995D — Adverse effect of other agents primarily affecting the cardiovascular system, subsequent encounter
T46.995D is a billable, specific ICD-10-CM code for adverse effect of other agents primarily affecting the cardiovascular system, 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 T46
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Excludes1 inherited from the categories above T46.995D
These are not written on T46.995D, but they bind it: a note on a category applies to every code beneath it. Billing T46.995D with anything listed here is a denial.
Risk adjustment
T46.995D 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
T46.995D is named in 20 Medicare coverage policies — 20 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
- A56844Billing and Coding: RAST Type Tests
Code history
T46.995D has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share T46.995. If T46.995D is not quite right, the correct code is usually one of these.
Questions about T46.995D
- Is T46.995D a billable ICD-10-CM code?
- Yes. T46.995D is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does T46.995D sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50).
- What cannot be coded together with T46.995D?
- T46.995D carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above T46.995D (T46) and apply to it just the same.