I82.B21 (Chronic embolism and thrombosis of right subclavian vein) compared with I82.B29 (Chronic embolism and thrombosis of unspecified subclavian vein), from the official CMS tabular data. I82.B21 and I82.B29 code the same condition on opposite sides.
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. I82.B21 and I82.B29 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
| I82.B21Chronic embolism and thrombosis of right subclavian vein | I82.B29Chronic embolism and thrombosis of unspecified subclavian vein | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | I00-I99 — Diseases of the Circulatory System (I00-I99) |
| Definition | Chronic embolism and thrombosis of right subclavian vein is a billable ICD-10-CM diagnosis code (I82.B21). | Chronic embolism and thrombosis of unspecified subclavian vein is a billable ICD-10-CM diagnosis code (I82.B29). |
| Code first | venous embolism and thrombosis complicating: abortion, ectopic or molar pregnancy (O00-O07, O08.7) | 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