Is I20.81 a billable ICD-10 code?

Yes. I20.81 (Angina pectoris with coronary microvascular dysfunction) is billable and can be used for insurance claims. Always verify payer-specific requirements.

I20.81 ✓ Billable

Angina pectoris with coronary microvascular dysfunction

Q: What is ICD-10 code I20.81?

ICD-10-CM code I20.81 stands for "Angina pectoris with coronary microvascular dysfunction". It is a billable code in the Diseases of the Circulatory System chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Diseases of the Circulatory System

Code

I20.81

System

ICD-10-CM

Billable

Yes — valid for submission

Effective

FY2026

Chapter

Diseases of the Circulatory System

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code I20.81?

ICD-10-CM code I20.81 represents Angina pectoris with coronary microvascular dysfunction. It is a billable diagnosis code in the Diseases of the Circulatory System chapter, effective October 1, 2025 – September 30, 2026.

Is I20.81 billable?

Yes. I20.81 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is I20.81 in?

I20.81 belongs to the Diseases of the Circulatory System chapter (I00–I99) of ICD-10-CM.

Related codes in the I20 category

I20 Angina pectoris Non-billable I20.0 Unstable angina Billable I20.1 Angina pectoris with documented spasm Billable I20.2 Refractory angina pectoris Billable I20.8 Other forms of angina pectoris Non-billable I20.9 Angina pectoris, unspecified Billable I20.89 Other forms of angina pectoris Billable

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