T39.4X6ABillable
Underdosing of antirheumatics, not elsewhere classified, initial encounter
Short description: Underdosing of antirheumatics, NEC, init
- Chapter
- 19. Injury, poisoning and certain other consequences of external causes
- Category
- T39
- Effective date
- October 1, 2026
Related codes in category T39
T39Nonopioid analgesics, antipyretics and antirheumaticsT39.0SalicylatesT39.01Poisoning by, adverse effect of and underdosing of aspirinT39.011Poisoning by aspirin, accidental (unintentional)T39.011APoisoning by aspirin, accidental (unintentional), initYesT39.011DPoisoning by aspirin, accidental (unintentional), subsYesT39.011SPoisoning by aspirin, accidental (unintentional), sequelaYesT39.012Poisoning by aspirin, intentional self-harmT39.012APoisoning by aspirin, intentional self-harm, init encntrYesT39.012DPoisoning by aspirin, intentional self-harm, subs encntrYesT39.012SPoisoning by aspirin, intentional self-harm, sequelaYesT39.013Poisoning by aspirin, assault
Frequently asked questions
What is ICD-10 code T39.4X6A?
T39.4X6A is an ICD-10-CM diagnosis code for Underdosing of antirheumatics, not elsewhere classified, initial encounter.
Is T39.4X6A a billable code?
Yes. T39.4X6A is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is T39.4X6A in?
T39.4X6A falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.
When did T39.4X6A become effective?
T39.4X6A has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to T39.4X6A?
T39.4X6A belongs to category T39, 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.