ICD-10-CM 2027
ICD-10 code for hypertension
Confirmed by the official ICD-10-CM index entry “hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)”. Page updated September 29, 2026.
About coding hypertension
The ICD-10-CM code for hypertension is I10 (Essential (primary) hypertension). The official index lists 17 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I10.
It is also searched as high blood pressure, HTN.
Don't report I10 together with the conditions in its Excludes1 note: hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16).
The conditions in its Excludes2 note aren't part of I10, but may be coded alongside it if the patient has both: essential (primary) hypertension involving vessels of brain (I60-I69) and essential (primary) hypertension involving vessels of eye (H35.0-).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Related Hypertension codes
- I11.0 Hypertensive heart disease with heart failure
- I11.9 Hypertensive heart disease without heart failure
- I12.0 Hypertensive chronic kidney disease with stage 5 chronic kidney disease or end stage renal disease
- I12.9 Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease
- I13.0 Hypertensive heart and chronic kidney disease with heart failure and stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease
- I13.10 Hypertensive heart and chronic kidney disease without heart failure, with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease
- I13.11 Hypertensive heart and chronic kidney disease without heart failure, with stage 5 chronic kidney disease, or end stage renal disease
- I13.2 Hypertensive heart and chronic kidney disease with heart failure and with stage 5 chronic kidney disease, or end stage renal disease
- I15.0 Renovascular hypertension
- I15.1 Hypertension secondary to other renal disorders
- I15.2 Hypertension secondary to endocrine disorders
- I15.8 Other secondary hypertension
- I15.9 Secondary hypertension, unspecified
- I16.0 Hypertensive urgency
- I16.1 Hypertensive emergency
- I16.9 Hypertensive crisis, unspecified
- I1A.0 Resistant hypertension
Don't confuse with (Excludes1 for I10)
Common questions about hypertension ICD-10 codes
What is the ICD-10 code for hypertension?
- I10 — Essential (primary) hypertension. More specific codes apply when the documentation supports them: I11.0, I11.9, I12.0, I12.9 and others below.
What is the ICD-10 code for hypertensive heart disease with heart failure?
- I11.0 — Hypertensive heart disease with heart failure.
What is the ICD-10 code for hypertensive heart disease without heart failure?
- I11.9 — Hypertensive heart disease without heart failure.
What is the ICD-10 code for hypertensive chronic kidney disease with stage 5 chronic kidney disease or end stage renal disease?
- I12.0 — Hypertensive chronic kidney disease with stage 5 chronic kidney disease or end stage renal disease.
What is the ICD-10 code for hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease?
- I12.9 — Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease.
What is the ICD-10 code for hypertensive heart and chronic kidney disease with heart failure and stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease?
- I13.0 — Hypertensive heart and chronic kidney disease with heart failure and stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease.
What is the ICD-10 code for hypertensive heart and chronic kidney disease without heart failure, with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease?
- I13.10 — Hypertensive heart and chronic kidney disease without heart failure, with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease.
Is I10 billable?
- Yes. I10 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I10 be used as a principal diagnosis?
- It can, but When it is the principal diagnosis, Medicare considers it a questionable reason for an inpatient admission, so claims may be reviewed.
Is I10 a CC or MCC?
- No. I10 is neither a CC nor an MCC under MS-DRG v44.0.