I45.81 – Long QT syndrome
ICD-10-CM 2027 diagnosis code · Other forms of heart disease
ICD-10-CM code
I45.81
- Code
I45.81(claims format:I4581)- Description
- Long QT syndrome
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 9. Diseases of the circulatory system (I00-I99)
- Block
- I30-I5A Other forms of heart disease
- Parent codes
- I45 › I45.8
Index terms for I45.81
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in I45.8
Frequently asked questions
What is ICD-10 code I45.81?
I45.81 is the ICD-10-CM code for long QT syndrome, in the block I30-I5A (Other forms of heart disease).
Is I45.81 a billable code?
Yes. I45.81 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does I45.81 belong to?
It belongs to category I45 – Other conduction disorders.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.