I77.9
BillableDisorder of arteries and arterioles, unspecified
HCC Category Mapping
V24HCC 108 — Vascular Disease
0.297ESRDHCC 108 — Vascular Disease
0.000What This Code Means
A general diagnosis of an unspecified disorder affecting arteries or small blood vessels.
Coding Tips
- •Avoid using this code when a more specific diagnosis is documented or can be determined
- •Query the provider for clarification on the specific arterial or arteriolar condition
Clinical Significance
Disorder of arteries and arterioles, unspecified, is the least specific code in the arterial disease category. It captures the presence of arterial disease when no further specificity is available. While it still maps to a vascular disease HCC, its unspecified nature creates significant audit risk and should prompt a query to the provider for more detailed documentation.
Documentation Requirements
- ✓Documentation of an arterial disorder requiring clinical attention
- ✓Provider query for more specific diagnosis when documentation is vague
- ✓Diagnostic workup results or clinical findings supporting arterial disease
- ✓Treatment or monitoring plan for the arterial condition
- ✓Rationale documented if no further specification is possible
Commonly Confused Codes
I77.89 — Other specified disorders of arteries and arterioles: use when a specific condition is described but has no unique codeI73.9 — Peripheral vascular disease, unspecified: for peripheral arterial disease specificallyI99.9 — Unspecified disorder of circulatory system: even broader, not limited to arteriesI70.x — Atherosclerosis codes: use when atherosclerotic disease is documented
Code Hierarchy
└I77Other disorders of arteries and arterioles└I77.9Disorder of arteries and arterioles, unspecified
└I77.9Disorder of arteries and arterioles, unspecified