I99.9
Unspecified disorder of circulatory system
Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 1 more
specific code sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 10 never code together
I00-I99chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
- systemic connective tissue disorders (M30-M36)M30-M36
- transient cerebral ischemic attacks and related syndromes (G45.-)G45.-
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes
No further instructional notes apply.
Index entries leading here 10
- Angiopathia, angiopathy I99.9
- Disease, diseased — see also Syndrome
- Change (s) (in) (of) — see also Removal
- Defect, defective Q89.9
- Circulation
- defective (lower extremity) I99.9
- Disturbance (s) — see also Disease
- Complication (s) (from) (of)
- vascular I99.9
- Damage
- vascular I99.9
- Deficiency, deficient
- vascular I99.9
- Lesion (s) (nontraumatic)
- vascular I99.9
Alongside this code 1 same parent — I99
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.