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Home/Diagnosis/ICD-10 Coding for Prolonged QT Interval

ICD-10 Coding for Prolonged QT Interval

I45.81
R94.31

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

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

Essential facts and insights about ICD-10 Coding for Prolonged QT Interval

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:
  • • Confirmed by ECG and/or genetic testing
documentation:
  • • Detailed documentation of QTc interval and related symptoms

Applicable To

  • • Congenital Long QT syndrome
  • • Acquired Long QT syndrome

Important Notes

  • • Ensure documentation specifies congenital or acquired and any related symptoms.

Abnormal electrocardiogram [ECG] [EKG]

Billable Code
R94.31
Billable

Diagnostic Criteria

clinical:
  • • QTc interval noted on ECG without other clinical confirmation of LQTS

Applicable To

  • • Prolonged QT interval without confirmed LQTS

Important Notes

  • • Document the reason for the abnormal ECG, such as drug-induced or electrolyte imbalance.
Ancillary Codes

Additional codes that may be used with this diagnosis

Q87.89

Other specified congenital malformation syndromes

Use with I45.81 for congenital LQTS.

Frequently Asked Questions

What is the ICD-10 code for prolonged QT?

The ICD-10 code for confirmed Long QT syndrome is I45.81. Use R94.31 for QT prolongation without confirmed syndrome.

How do you code drug-induced QT prolongation?

For drug-induced QT prolongation, use R94.31 along with the appropriate drug adverse effect code.

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