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Home/Diagnosis/ICD-10 Coding for Prothrombin Time International Normalized Ratio

ICD-10 Coding for Prothrombin Time International Normalized Ratio

I48.21
Z79.01

Complete ICD-10-CM coding and documentation guide for icd-10 coding for prothrombin time international normalized ratio includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
PT/INR
Prothrombin Time
INR
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Key Information: ICD-10 Coding for Prothrombin Time International Normalized Ratio

Essential facts and insights about ICD-10 Coding for Prothrombin Time International Normalized Ratio

Use ICD-10 code I48.21 for permanent atrial fibrillation, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Permanent atrial fibrillation

Billable Code
I48.21
Billable

Diagnostic Criteria

  • • Patient has a confirmed diagnosis of permanent atrial fibrillation.

Applicable To

  • • Chronic atrial fibrillation

Important Notes

  • • Ensure documentation supports the chronic nature of atrial fibrillation.

Long term (current) use of anticoagulants

Billable Code
Z79.01
Billable

Applicable To

  • • Chronic use of warfarin

Important Notes

  • • Ensure therapy duration is clearly documented.
Ancillary Codes

Additional codes that may be used with this diagnosis

Z79.01

Long term (current) use of anticoagulants

Use to indicate ongoing anticoagulation therapy.

Frequently Asked Questions

What is the ICD-10 code for PT/INR?

The ICD-10 code for PT/INR monitoring related to atrial fibrillation is I48.21, with Z79.01 for long-term anticoagulant use.

How do you document INR results?

Document INR results by including the current INR value, therapeutic range, and any dose adjustments or follow-up plans.

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