S45.819A vs S45.819S

S45.819A (Laceration of other specified blood vessels at shoulder and upper arm level, unspecified arm, initial encounter) compared with S45.819S (Laceration of other specified blood vessels at shoulder and upper arm level, unspecified arm, sequela), from the official CMS tabular data. S45.819A and S45.819S code the same injury at a different phase of treatment.

Relationship

Review

Encounter relationship

S45.819A

Initial encounter

Laceration of other specified blood vessels at shoulder and upper arm level, unspecified arm, initial encounter

↔

S45.819S

Sequela

Laceration of other specified blood vessels at shoulder and upper arm level, unspecified arm, sequela

Same underlying diagnosis, different encounter phase.

The 7th character records the phase of care for the encounter being coded, so a single encounter takes one of these characters, not several. Review whether both phases belong on the same episode of care.

Source: ICD-10-CM Official Guidelines, Section I.C.19.a

Can these codes be reported together?

Same injury, other encounter phase. S45.819A and S45.819S code the same injury at a different phase of treatment, set by the 7th character.

The 7th character records the type of care given at the encounter being coded (ICD-10-CM Official Guidelines, Section I.C.19.a), so one encounter takes one of these, not both.

Side by side

	S45.819ALaceration of other specified blood vessels at shoulder and upper arm level, unspecified arm, initial encounter	S45.819SLaceration of other specified blood vessels at shoulder and upper arm level, unspecified arm, sequela
Billing status	Billable	Billable
Classification	S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)	S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
Definition	Laceration of other specified blood vessels at shoulder and upper arm level, unspecified arm, initial encounter is a billable ICD-10-CM diagnosis code (S45.819A).	Laceration of other specified blood vessels at shoulder and upper arm level, unspecified arm, sequela is a billable ICD-10-CM diagnosis code (S45.819S).
7th character	The appropriate 7th character is to be added to each code from category S45	The 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