ICD-10 Code I15: Secondary hypertension
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the circulatory system (I00-I99).
đź“‹Clinical overview
This ICD-10 code is commonly used when documentation describes elevated blood pressure or hypertensive disease. The most accurate code depends on whether the condition is primary, secondary, or linked with heart or kidney involvement.
When is it used?
- May be used when a clinician documents secondary hypertension in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
đź©şClinical context
- Primary care, cardiology, nephrology, and pre-operative documentation where blood pressure disease is part of the active problem list.
- Chronic disease follow-up and risk-adjustment workflows where hypertension status affects longitudinal care planning.
- Clinical follow-up often includes blood-pressure measurement, medication review, kidney-risk assessment, and cardiovascular risk management.
- Documentation becomes more specific when the chart links hypertension with heart failure, chronic kidney disease, or another secondary cause.
- Specialist context already linked on this page includes Cardiologist, General Physician.
🔍Key distinctions
- ICD-10 hypertension coding is often broader than the actual treatment plan; the exact code depends on whether associated heart or kidney disease is documented.
- Secondary hypertension and hypertensive heart or kidney disease generally require more specific codes than uncomplicated essential hypertension.
- postprocedural hypertension (I97.3)
- secondary hypertension involving vessels of brain (I60-I69)
- secondary hypertension involving vessels of eye (H35.0-)
Code hierarchy
Official coding notes
- postprocedural hypertension (I97.3)
- secondary hypertension involving vessels of brain (I60-I69)
- secondary hypertension involving vessels of eye (H35.0-)
- underlying condition
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
Related codes
Sibling codes
Coding guidelines
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Common synonyms
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.