ICD-10-CM I15 is the diagnosis code for Secondary hypertension. This code falls under the section "Hypertensive diseases" within Chapter 9 â Diseases of the circulatory system (I00-I99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as I15. They are mutually exclusive:
The following conditions are not included in I15. If the patient has both, code each condition separately:
Understanding where I15 sits in the ICD-10-CM classification helps ensure proper coding:
No, I15 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
I15 is the ICD-10-CM diagnosis code for "Secondary hypertension". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
I15 is located in Section I10-I1A â "Hypertensive diseases" within Chapter 9 of the ICD-10-CM Tabular List.
I15 has 5 sub-code(s) that provide more specific detail: I15.0, I15.1, I15.2, I15.8, I15.9.
Use I15 when the patients documented diagnosis matches "Secondary hypertension" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Secondary hypertension is I15.
No, I15 is non-billable. Use a more specific sub-code for primary diagnosis billing.
I15 is in Chapter 9 of the ICD-10-CM Tabular List.
Type 1 Excludes for I15 include: postprocedural hypertension (I97.3).
Yes, I15 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.