I15.8

Billable

Other secondary hypertension

HCC Category Mapping

RxHCCHCC 187 — Hypertension

0.000

What This Code Means

High blood pressure caused by another medical condition or medication, not otherwise specified. This includes secondary hypertension from various identifiable causes.

Coding Tips

•Always identify and code the underlying cause of hypertension (e.g., kidney disease, endocrine disorder) as an additional diagnosis
•Use this code only when the specific secondary cause doesn't fit other I15 subcategories

Clinical Significance

Other secondary hypertension captures hypertension due to identifiable causes not classified under renovascular, renal, or endocrine categories. This includes hypertension secondary to coarctation of the aorta, sleep apnea, medications, or other systemic conditions. Identifying the underlying cause may enable targeted treatment beyond standard antihypertensive therapy.

Documentation Requirements

✓Provider documentation explicitly identifying the secondary cause of hypertension
✓Identification of the specific underlying condition causing hypertension
✓Blood pressure readings
✓Additional code for the underlying causative condition
✓Current treatment plan addressing both the hypertension and the underlying cause
✓Documentation that the cause is not renovascular, renal, or endocrine (which have specific I15.x codes)

Commonly Confused Codes

I10 — Essential hypertension (use when no secondary cause is identified)I15.0 — Renovascular hypertension (use when renal artery stenosis is the cause)I15.1 — Hypertension secondary to renal disorders (use for renal causes)I15.2 — Hypertension secondary to endocrine disorders (use for endocrine causes)I15.9 — Secondary hypertension, unspecified (use when a secondary cause is known to exist but is not specified)

Code Hierarchy

└I15Secondary hypertension └I15.8Other secondary hypertension

└I15.8Other secondary hypertension