ICD-10-CM 2027
ICD-10 code for heart hypertension
From the official ICD-10-CM alphabetic index entry “Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) › heart (disease) (conditions in I51.4-I51.9 due to hypertension)”. Page updated September 29, 2026.
About coding heart hypertension
The ICD-10-CM code for heart hypertension is I11.9 (Hypertensive heart disease without heart failure). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on I11.9.
Within I11, choose I11.9 (without heart failure) only when documentation doesn't support a more specific option: with heart failure (I11.0).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 304 (Hypertension with MCC, relative weight 1.2011) and DRG 305 (Hypertension without MCC, relative weight 0.7581), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific heart hypertension codes (official index)
- with
- heart failure (congestive) I11.0 — Hypertensive heart disease with heart failure
- kidney disease (chronic)
Common questions about heart hypertension ICD-10 codes
What is the ICD-10 code for heart hypertension?
- I11.9 — Hypertensive heart disease without heart failure. More specific codes apply when the documentation supports them: I11.0.
Is I11.9 billable?
- Yes. I11.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I11.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I11.9 as a principal diagnosis.
Is I11.9 a CC or MCC?
- No. I11.9 is neither a CC nor an MCC under MS-DRG v44.0.