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

The ICD-10 code for Long QT syndrome is I45.81, used when the syndrome is documented without congenital specification.

How do you code congenital Long QT syndrome?

Congenital Long QT syndrome, such as Romano-Ward, is coded as Q87.89, requiring genetic confirmation.

ICD-10 Coding for Prolonged QTc(I45.81, I45.8, Q87.89)

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Comprehensive guide on coding and documenting Prolonged QTc, including Long QT syndrome and congenital variants. Learn about ICD-10 codes, documentation requirements, and common pitfalls.

Also known as:

Long QT SyndromeQT Interval Prolongation

Related ICD-10 Code Ranges

Complete code families applicable to Prolonged QTc

I00-I99Primary Range

Diseases of the circulatory system

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Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

Code	Description	When to Use	Key Documentation
I45.81	Long QT syndrome	Use when Long QT syndrome is documented without congenital specification.	ECG showing prolonged QTc Documentation of syndrome
Q87.89	Other specified congenital malformation syndromes	Use when congenital syndrome is documented.	Genetic testing confirming congenital syndrome Family history of sudden cardiac death
R94.3	Abnormal cardiovascular function study	Use for isolated ECG findings of prolonged QTc.	ECG showing QTc prolongation No documented syndrome

Primary ICD-10-CM Codes

Long QT syndrome

I45.81Billable

Differential Codes

Alternative codes to consider when ruling out similar conditions

Other specified congenital malformation syndromesQ87.89

Use for congenital syndromes like Romano-Ward.

Long QT syndromeI45.81

Use for non-congenital Long QT syndrome.

Documentation & Coding Risks

Avoid these common issues when documenting Prolonged QTc.

Omitting genetic confirmation for congenital syndromes

Impact

Clinical: Leads to misdiagnosis and inappropriate treatment., Regulatory: Non-compliance with coding standards., Financial: Potential reimbursement issues.

Mitigation

Ensure genetic testing is performed and documented., Review family history for congenital syndromes.

Using R94.3 for documented Long QT syndrome

Impact

Reimbursement: May lead to incorrect DRG assignment., Compliance: Non-compliance with ICD-10 guidelines., Data Quality: Inaccurate clinical data representation.

Mitigation

Use I45.81 or Q87.89 based on syndrome documentation.

Documentation of congenital syndromes

Impact

Lack of genetic confirmation can lead to audit issues.

Mitigation

Ensure genetic testing is documented for congenital cases.

Frequently Asked Questions

Documentation requirements, coding pitfalls and FAQs for conditions coded with I45.81.

Primary Code

I45.81

Long QT syndrome

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ICD-10 codes4

Coding risks3

FAQs2

ICD-10 Coding for Prolonged QTc(I45.81, I45.8, Q87.89)

Documentation & Coding Risks

Frequently Asked Questions

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

How do you code congenital Long QT syndrome?

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