U.S. ICD-10-CM · FY 2027

I10 ICD-10-CM Code: Essential (primary) hypertension

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

I10

Essential (primary) hypertension

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where I10 sits

  1. 1

    Chapter 9

    Diseases of the circulatory system (I00-I99)

  2. 2

    Section

    Hypertensive diseases (I10-I1A)

  3. 3

    Category I10

    Essential (primary) hypertension

  4. 4

    Code I10

    Essential (primary) hypertension

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for I10.

Code first

No “code first” instruction is listed for I10.

Use additional code

No “use additional code” instruction is listed for I10.

Excludes1

Conditions that should not be reported together with this code.

  • hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)

Excludes2

Conditions not included here that may be reported separately when present.

  • essential (primary) hypertension involving vessels of brain (I60-I69)
  • essential (primary) hypertension involving vessels of eye (H35.0-)

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code I10 mean?

I10 is the FY 2027 U.S. ICD-10-CM code for “Essential (primary) hypertension.”

Is I10 a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, I10 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.

Where is I10 located in ICD-10-CM?

I10 is listed in Chapter 9, Diseases of the circulatory system (I00-I99), within Hypertensive diseases (I10-I1A) (I10–I1A), under category I10, Essential (primary) hypertension.

What coding notes are listed for I10?

No inclusion terms are listed for I10 in this reference record. No code-first instruction is listed. Excludes1 notes: hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16). Excludes2 notes: essential (primary) hypertension involving vessels of brain (I60-I69); essential (primary) hypertension involving vessels of eye (H35.0-).

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