I10 is the code for primary (essential) hypertension. It's one of the most-reported diagnosis codes in primary care.
Common questions
Is I10 a billable code?
Yes. I10 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.
Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. About BillingBrief and our sources.
