I81 vs I82.563
I81 (Portal vein thrombosis) compared with I82.563 (Chronic embolism and thrombosis of calf muscular vein, bilateral), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. I82.563 carries an Excludes2 note covering I81: “portal (I81)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| I81Portal vein thrombosis | I82.563Chronic embolism and thrombosis of calf muscular vein, bilateral | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | I00-I99 — Diseases of the Circulatory System (I00-I99) |
| Definition | Portal vein thrombosis is a billable ICD-10-CM diagnosis code (I81). | Chronic embolism and thrombosis of calf muscular vein, bilateral is a billable ICD-10-CM diagnosis code (I82.563). |
| Includes | Portal (vein) obstruction | — |
| Use additional code | — | code, if applicable, for associated long-term (current) use of anticoagulants (Z79.01) |
| Code first | — | venous embolism and thrombosis complicating: abortion, ectopic or molar pregnancy (O00-O07, O08.7) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources