T50.991ABillable
Poisoning by other drugs, medicaments and biological substances, accidental (unintentional), initial encounter
Short description: Poisoning by oth drug/meds/biol subst, accidental, init
- Chapter
- 19. Injury, poisoning and certain other consequences of external causes
- Category
- T50
- Effective date
- October 1, 2026
Related codes in category T50
T50Diuretics and oth and unsp drug/meds/biol substT50.0Mineralocorticoids and their antagonistsT50.0XMineralocorticoids and their antagonistsT50.0X1Poisoning by mineralocorticoids and their antag, accidentalT50.0X1APoisoning by mineralocorticoids and their antag, acc, initYesT50.0X1DPoisoning by mineralocorticoids and their antag, acc, subsYesT50.0X1SPoisoning by mineralocorticoids and antag, acc, sequelaYesT50.0X2Poisoning by mineralocorticoids and their antag, self-harmT50.0X2APoisoning by mineralocorticoids and antag, self-harm, initYesT50.0X2DPoisoning by mineralocorticoids and antag, self-harm, subsYesT50.0X2SPoisn by mineralocorticoids and antag, self-harm, sequelaYesT50.0X3Poisoning by mineralocorticoids and their antag, assault
Frequently asked questions
What is ICD-10 code T50.991A?
T50.991A is an ICD-10-CM diagnosis code for Poisoning by other drugs, medicaments and biological substances, accidental (unintentional), initial encounter.
Is T50.991A a billable code?
Yes. T50.991A is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is T50.991A in?
T50.991A falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.
When did T50.991A become effective?
T50.991A has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to T50.991A?
T50.991A belongs to category T50, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.