I63.6 vs I82.56
I63.6 (Cerebral infarction due to cerebral venous thrombosis, nonpyogenic) compared with I82.56 (Chronic embolism and thrombosis of calf muscular vein), 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. I82.56 carries an Excludes2 note covering I63.6: “cerebral (I63.6, I67.6)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| I63.6Cerebral infarction due to cerebral venous thrombosis, nonpyogenic | I82.56Chronic embolism and thrombosis of calf muscular vein | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | I00-I99 — Diseases of the Circulatory System (I00-I99) |
| Definition | Cerebral infarction due to cerebral venous thrombosis, nonpyogenic is a billable ICD-10-CM diagnosis code (I63.6). | Chronic embolism and thrombosis of calf muscular vein is a non-billable ICD-10-CM category code (I82.56). |
| Includes | occlusion and stenosis of cerebral and precerebral arteries, resulting in cerebral infarction | Chronic embolism and thrombosis of calf muscular vein NOS Chronic embolism and thrombosis of gastrocnemial vein Chronic embolism and thrombosis of soleal vein |
| Use additional code | code, if applicable, to identify status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82) code, if known, to indicate National Institutes of Health Stroke Scale (NIHSS) score (R29.7-) code to identify presence of: | 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