S46.312D (Strain of muscle, fascia and tendon of triceps, left arm, subsequent encounter) compared with S46.319D (Strain of muscle, fascia and tendon of triceps, unspecified arm, subsequent encounter), from the official CMS tabular data. S46.312D and S46.319D 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. S46.312D and S46.319D 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.
| S46.312DStrain of muscle, fascia and tendon of triceps, left arm, subsequent encounter | S46.319DStrain of muscle, fascia and tendon of triceps, unspecified arm, subsequent 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 | Strain of muscle, fascia and tendon of triceps, left arm, subsequent encounter is a billable ICD-10-CM diagnosis code (S46.312D). | Strain of muscle, fascia and tendon of triceps, unspecified arm, subsequent encounter is a billable ICD-10-CM diagnosis code (S46.319D). |
| 7th character | The appropriate 7th character is to be added to each code from category S46 | The appropriate 7th character is to be added to each code from category S46 |
| 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