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Home/Diagnosis/ICD-10 Coding for Long QT Syndrome

ICD-10 Coding for Long QT Syndrome

I45.81
Q87.89

Complete ICD-10-CM coding and documentation guide for icd-10 coding for long qt syndrome includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
Long QT Interval
LQTS
Romano-Ward Syndrome
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Key Information: ICD-10 Coding for Long QT Syndrome

Essential facts and insights about ICD-10 Coding for Long QT Syndrome

Use ICD-10 code I45.81 for long qt syndrome, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Long QT syndrome

Billable Code
I45.81
Billable

Diagnostic Criteria

clinical:
  • • QTc ≥480 ms in females, ≥470 ms in males
  • • Genetic testing confirming pathogenic variant
documentation:
  • • Presence of arrhythmias and family history

Applicable To

  • • Prolonged QT interval

Important Notes

  • • Ensure documentation specifies whether the condition is congenital or acquired.

Other specified congenital malformation syndromes

Billable Code
Q87.89
Billable

Diagnostic Criteria

clinical:
  • • Genetic confirmation of congenital syndrome
  • • Family history of sudden cardiac death

Applicable To

  • • Romano-Ward syndrome
  • • Jervell and Lange-Nielsen syndrome

Important Notes

  • • Document specific congenital syndrome and genetic findings.
Ancillary Codes

Additional codes that may be used with this diagnosis

R94.3

Abnormal cardiovascular study

Use for asymptomatic patients with ECG findings but no active symptoms.

Frequently Asked Questions

What is the ICD-10 code for Long QT Syndrome?

The ICD-10 code for Long QT Syndrome is I45.81. For congenital forms, use Q87.89 as an additional code.

How is Long QT Syndrome documented?

Documentation should include QTc measurements, genetic test results, and specify whether the condition is congenital or acquired.

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