S44.50XA vs S44.50XS

S44.50XA (Injury of cutaneous sensory nerve at shoulder and upper arm level, unspecified arm, initial encounter) compared with S44.50XS (Injury of cutaneous sensory nerve at shoulder and upper arm level, unspecified arm, sequela), from the official CMS tabular data. S44.50XA and S44.50XS code the same injury at a different phase of treatment. MedCoder-derived

Relationship

Review

Encounter relationship

S44.50XA

Initial encounter

Injury of cutaneous sensory nerve at shoulder and upper arm level, unspecified arm, initial encounter

↔

S44.50XS

Sequela

Injury of cutaneous sensory nerve 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. S44.50XA and S44.50XS 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

	S44.50XAInjury of cutaneous sensory nerve at shoulder and upper arm level, unspecified arm, initial encounter	S44.50XSInjury of cutaneous sensory nerve 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	Injury of cutaneous sensory nerve at shoulder and upper arm level, unspecified arm, initial encounter is a billable ICD-10-CM diagnosis code (S44.50XA).	Injury of cutaneous sensory nerve at shoulder and upper arm level, unspecified arm, sequela is a billable ICD-10-CM diagnosis code (S44.50XS).
7th character	The appropriate 7th character is to be added to each code from category S44	The appropriate 7th character is to be added to each code from category S44
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