I45.81Billable
Long QT syndrome
- Chapter
- 9. Diseases of the circulatory system
- Category
- I45
- Effective date
- October 1, 2026
Related codes in category I45
I45Other conduction disordersI45.0Right fascicular blockYesI45.1Other and unspecified right bundle-branch blockI45.10Unspecified right bundle-branch blockYesI45.19Other right bundle-branch blockYesI45.2Bifascicular blockYesI45.3Trifascicular blockYesI45.4Nonspecific intraventricular blockYesI45.5Other specified heart blockYesI45.6Pre-excitation syndromeYesI45.8Other specified conduction disordersI45.89Other specified conduction disordersYes
Frequently asked questions
What is ICD-10 code I45.81?
I45.81 is an ICD-10-CM diagnosis code for Long QT syndrome.
Is I45.81 a billable code?
Yes. I45.81 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is I45.81 in?
I45.81 falls under Chapter 9: Diseases of the circulatory system.
When did I45.81 become effective?
I45.81 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to I45.81?
I45.81 belongs to category I45, 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.