I10
Billable codeEssential (primary) hypertension
The ICD-10 code for essential (primary) hypertension is I10.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
Excludes2 (not included here)
An Excludes2 note means the excluded condition is not part of this one, but a patient can have both at the same time — in that case both codes may be reported together.
Includes
Terms listed here further define or give examples of the conditions grouped under this code — they describe what the code covers, not a separate diagnosis.
- high blood pressure
- hypertension (arterial) (benign) (essential) (malignant) (primary) (systemic)
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- I11Hypertensive heart diseasenon-billable header
- I12Hypertensive chronic kidney diseasenon-billable header
- I13Hypertensive heart and chronic kidney diseasenon-billable header
- I15Secondary hypertensionnon-billable header
- I16Hypertensive crisisnon-billable header
- I1AOther hypertensionnon-billable header
- I10Essential (primary) hypertension
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 4010Approximate match
- 4011Approximate match
- 4019Approximate match
Associated MS-DRGs
I10 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.