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S45.991 vs S45.999

S45.991 (Other specified injury of unspecified blood vessel at shoulder and upper arm level, right arm) compared with S45.999 (Other specified injury of unspecified blood vessel at shoulder and upper arm level, unspecified arm), from the official CMS tabular data. S45.991 and S45.999 code the same condition on opposite sides.

Relationship

Review

Laterality relationship

S45.991
Right
Other specified injury of unspecified blood vessel at shoulder and upper arm level, right arm
↔
S45.999
Unspecified
Other specified injury of unspecified blood vessel at shoulder and upper arm level, unspecified arm

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)

Can these codes be reported together?

Same condition, opposite side. S45.991 and S45.999 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.

Side by side

S45.991Other specified injury of unspecified blood vessel at shoulder and upper arm level, right armS45.999Other specified injury of unspecified blood vessel at shoulder and upper arm level, unspecified arm
Billing statusNon-billable header

Report instead: S45.991A, S45.991D, S45.991S

Non-billable header

Report instead: S45.999A, S45.999D, S45.999S

ClassificationS00-T88 — Injury, poisoning and certain other consequences of external causesS00-T88 — Injury, poisoning and certain other consequences of external causes
DefinitionOther specified injury of unspecified blood vessel at shoulder and upper arm level, right arm is a non-billable ICD-10-CM category code (S45.991).Other specified injury of unspecified blood vessel at shoulder and upper arm level, unspecified arm is a non-billable ICD-10-CM category code (S45.999).
7th characterThe appropriate 7th character is to be added to each code from category S45The appropriate 7th character is to be added to each code from category S45
Includes
injuries of axilla
injuries of scapular region
injuries of axilla
injuries of scapular region
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources