MCMCB Pro
T46.0X4A

T46.0X4APoisoning by cardiac-stimulant glycosides and drugs of similar action, undetermined, initial encounter

Billable / specific codeICD-10-CM

T46.0X4A is a billable, specific ICD-10-CM code for poisoning by cardiac-stimulant glycosides and drugs of similar action, undetermined, 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 T46

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

T46.0X4A 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

T46.0X4A is named in 13 Medicare coverage policies 13 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A54799Billing and Coding: Urine Drug Testing
  • A55001Billing and Coding: Urine Drug Testing
  • A56612Billing and Coding: CT of the Head
  • A56645Billing and Coding: Controlled Substance Monitoring and Drugs of Abuse Testing

Related codes at this level

Codes that share T46.0X4. If T46.0X4A is not quite right, the correct code is usually one of these.

Questions about T46.0X4A

Is T46.0X4A a billable ICD-10-CM code?
Yes. T46.0X4A is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does T46.0X4A 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).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.