I1A: Other hypertension
Codes under I1A (Other hypertension). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| I1A.0 | Resistant hypertension | ✓ |
| I1A.0 | Resistant hypertension | ✓ |
Frequently asked questions
What is ICD-10-CM code I1A?
I1A is an ICD-10-CM category covering Other hypertension. It contains 2 more specific diagnosis codes, 2 of which are billable.
Is I1A a billable code?
No — I1A is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example I1A.0 — Resistant hypertension). 2 of the 2 codes under I1A are billable.
What codes fall under I1A?
I1A includes I1A.0, I1A.0. See the full list with descriptions and billable status above.
More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees
Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
Code the diagnosis right
Join providers across the country delivering modern virtual care with CareNiva. Free to start, ready in minutes.
100% Satisfaction Guaranteed — try it risk-free