S06.2X4A vs S06.2X4S

S06.2X4A (Diffuse traumatic brain injury with loss of consciousness of 6 hours to 24 hours, initial encounter) compared with S06.2X4S (Diffuse traumatic brain injury with loss of consciousness of 6 hours to 24 hours, sequela), from the official CMS tabular data. S06.2X4A and S06.2X4S code the same injury at a different phase of treatment. MedCoder-derived

Relationship

Review

Encounter relationship

S06.2X4A

Initial encounter

Diffuse traumatic brain injury with loss of consciousness of 6 hours to 24 hours, initial encounter

↔

S06.2X4S

Sequela

Diffuse traumatic brain injury with loss of consciousness of 6 hours to 24 hours, 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. S06.2X4A and S06.2X4S 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

	S06.2X4ADiffuse traumatic brain injury with loss of consciousness of 6 hours to 24 hours, initial encounter	S06.2X4SDiffuse traumatic brain injury with loss of consciousness of 6 hours to 24 hours, sequela
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	Diffuse traumatic brain injury with loss of consciousness of 6 hours to 24 hours, initial encounter is a billable ICD-10-CM diagnosis code (S06.2X4A).	Diffuse traumatic brain injury with loss of consciousness of 6 hours to 24 hours, sequela is a billable ICD-10-CM diagnosis code (S06.2X4S).
7th character	The appropriate 7th character is to be added to each code from category S06, except as noted below	The appropriate 7th character is to be added to each code from category S06, except as noted below
Includes	traumatic brain injury injuries of ear injuries of eye injuries of face [any part]	traumatic brain injury injuries of ear injuries of eye injuries of face [any part]
Use additional code	code, if applicable, for traumatic brain compression or herniation (S06.A-) code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)	code, if applicable, for traumatic brain compression or herniation (S06.A-) code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)

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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