S40.822 (Blister (nonthermal) of left upper arm) compared with S40.829 (Blister (nonthermal) of unspecified upper arm), from the official CMS tabular data. S40.822 and S40.829 code the same condition on opposite sides. MedCoder-derived
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. S40.822 and S40.829 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.
| S40.822Blister (nonthermal) of left upper arm | S40.829Blister (nonthermal) of unspecified upper arm | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | S00-T88 — Injury, poisoning and certain other consequences of external causes | S00-T88 — Injury, poisoning and certain other consequences of external causes |
| Definition | Blister (nonthermal) of left upper arm is a non-billable ICD-10-CM category code (S40.822). | Blister (nonthermal) of unspecified upper arm is a non-billable ICD-10-CM category code (S40.829). |
| 7th character | The appropriate 7th character is to be added to each code from category S40 | The appropriate 7th character is to be added to each code from category S40 |
| Includes | injuries of axilla injuries of scapular region | injuries of axilla injuries of scapular region |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources