S06.30AA vs S06.30AS

S06.30AA (Unspecified focal traumatic brain injury with loss of consciousness status unknown, initial encounter) compared with S06.30AS (Unspecified focal traumatic brain injury with loss of consciousness status unknown, sequela), from the official CMS tabular data. S06.30AA and S06.30AS code the same injury at a different phase of treatment.

Relationship

Review

Encounter relationship

S06.30AA

Initial encounter

Unspecified focal traumatic brain injury with loss of consciousness status unknown, initial encounter

↔

S06.30AS

Sequela

Unspecified focal traumatic brain injury with loss of consciousness status unknown, 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. S06.30AA and S06.30AS 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

	S06.30AAUnspecified focal traumatic brain injury with loss of consciousness status unknown, initial encounter	S06.30ASUnspecified focal traumatic brain injury with loss of consciousness status unknown, 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	Unspecified focal traumatic brain injury with loss of consciousness status unknown, initial encounter is a billable ICD-10-CM diagnosis code (S06.30AA).	Unspecified focal traumatic brain injury with loss of consciousness status unknown, sequela is a billable ICD-10-CM diagnosis code (S06.30AS).
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