2026 ICD-10-CM Diagnosis Code I15Secondary hypertension
I15 is a non-billable ICD-10-CM category code for secondary hypertension, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I15.0, I15.1, I15.2, and I15.8.
Code Identity
Code Classification
Specific Coding for Secondary hypertensionOverview
Non-specific codes like I15 require more characters. Use one of these billable codes instead:
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Code Also
- underlying condition
Type 1 Excludes
- postprocedural hypertension I97.3
Type 2 Excludes
- secondary hypertension involving vessels of brain I60 I69
- secondary hypertension involving vessels of eye H35.0
A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Patient EducationClinical
High Blood Pressure
Blood pressure is the force of your blood pushing against the walls of your arteries. Each time your heart beats, it pumps blood into the arteries. Your blood pressure is highest when your heart beats, pumping the blood. This is called systolic pressure. When your heart is at rest, between beats, your blood pressure falls.
The full article covers:
- What is blood pressure?
- How is high blood pressure diagnosed?
- What are the different types of high blood pressure?
- Why do I need to worry about high blood pressure?
- What are the treatments for high blood pressure?
Read the full article at MedlinePlus
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