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ICD-10-CM/Diseases of the circulatory system

I10-I1A

Hypertensive diseases (I10-I1A)

I10-I1A contains 7 categories and 25 ICD-10-CM codes for FY2027.

I10Essential (primary) hypertension1 billable
I11Hypertensive heart disease2 billable
I12Hypertensive chronic kidney disease2 billable
I13Hypertensive heart and chronic kidney disease4 billable
I15Secondary hypertension5 billable
I16Hypertensive crisis3 billable
I1AOther hypertension1 billable

Every ICD-10-CM code, and whether you can actually bill it

Built directly from the official ICD-10-CM FY2027 release published by the CDC / National Center for Health Statistics and CMS.

FY2027 codes are valid for encounters from October 1, 2026 through September 30, 2027.

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Coding guides

Billable vs Non-Billable ICD-10 Codes Explained
Excludes1 vs Excludes2 in ICD-10-CM: The Difference
Unspecified codes and denial risk
ICD-10-CM 7th Characters (A, D, S) and Placeholder X
Code first, use additional code, and code also
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FY2027 updates
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Not medical or billing advice. This site reproduces the ICD-10-CM classification for reference. Code selection must be based on the provider’s documentation and the ICD-10-CM Official Guidelines for Coding and Reporting. Verify against payer policy before submitting a claim. ICDcodes.org is not affiliated with CMS, CDC or NCHS.

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