I10 – Essential (primary) hypertension

ICD-10-CM 2027 diagnosis code · Hypertensive diseases

Billable code

ICD-10-CM code I10

Code: I10 (claims format: I10)
Description: Essential (primary) hypertension
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 9. Diseases of the circulatory system (I00-I99)
Block: I10-I1A Hypertensive diseases

Notes for I10

Includes:

high blood pressure
hypertension (arterial) (benign) (essential) (malignant) (primary) (systemic)

Excludes1 (not coded here):

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

Excludes2 (not included here):

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

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block I10-I1A

Excludes1 (not coded here):

neonatal hypertension (P29.2)
primary pulmonary hypertension (I27.0)

Excludes2 (not included here):

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

Use additional code:

code to identify:
exposure to environmental tobacco smoke (Z77.22)
history of tobacco dependence (Z87.891)
occupational exposure to environmental tobacco smoke (Z57.31)
tobacco dependence (F17.-)
tobacco use (Z72.0)

Index terms for I10

Entries in the ICD-10-CM alphabetic index that lead to this code:

Hypertension, hypertensive

Frequently asked questions

What is ICD-10 code I10?

I10 is the ICD-10-CM code for essential (primary) hypertension, in the block I10-I1A (Hypertensive diseases).

Is I10 a billable code?

Yes. I10 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.