S40.861A (Insect bite (nonvenomous) of right upper arm, initial encounter) compared with S40.869A (Insect bite (nonvenomous) of unspecified upper arm, initial encounter), from the official CMS tabular data. S40.861A and S40.869A 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. S40.861A and S40.869A 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.
| S40.861AInsect bite (nonvenomous) of right upper arm, initial encounter | S40.869AInsect bite (nonvenomous) of unspecified upper arm, initial encounter | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | S00-T88 — Injury, poisoning and certain other consequences of external causes | S00-T88 — Injury, poisoning and certain other consequences of external causes |
| Definition | Insect bite (nonvenomous) of right upper arm, initial encounter is a billable ICD-10-CM diagnosis code (S40.861A). | Insect bite (nonvenomous) of unspecified upper arm, initial encounter is a billable ICD-10-CM diagnosis code (S40.869A). |
| 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