S06.0X0A

Concussion without loss of consciousness, initial encounter

S06.0X0A represents a concussion, categorized as a mild traumatic brain injury (mTBI), where the clinical documentation confirms that no loss of consciousness occurred during or immediately following the traumatic event. The 'A' extension signifies the initial encounter, which is the period during which the patient is receiving active treatment for the injury. A concussion is a complex pathophysiological process affecting the brain, typically induced by biomechanical forces such as a direct blow to the head, face, or neck. It results in temporary impairment of neurological function and is characterized by a rapid onset of short-lived impairment of neurological function that resolves spontaneously. However, in some cases, symptoms may evolve over minutes to hours. This diagnosis is functional rather than structural; therefore, standard neuroimaging (CT or MRI) typically shows no abnormalities. Clinical management focuses on symptom monitoring, physical and cognitive rest, and a gradual return-to-activity protocol.

Clinical Symptoms

Headache
Dizziness
Nausea
Vomiting
Fatigue or drowsiness
Sensitivity to light (photophobia)
Sensitivity to noise (phonophobia)
Feeling mentally 'foggy' or slowed down
Difficulty concentrating
Difficulty remembering
Irritability
Sadness
Nervousness or anxiety
Blurred vision
Balance problems
Delayed reaction times
Sleep disturbances (insomnia or hypersomnia)
Emotional lability

Common Causes

Falls from heights or on level ground
Motor vehicle accidents including passenger vehicle collisions
Contact sports injuries (e.g., football, soccer, hockey, boxing)
Physical assaults or blunt force trauma to the head
Bicycle or motorcycle accidents
Blast injuries in military personnel
Accidental strikes by objects
Work-related accidents (e.g., construction site injuries)

Documentation & Coding Tips

Explicitly confirm the absence of loss of consciousness. Documentation must clearly state that no loss of consciousness occurred to justify the use of S06.0X0A versus S06.0X1A. This distinction is critical for medical necessity in diagnostic imaging and clinical severity tracking.

Example: Patient presents following a head strike against a cabinet. Patient and spouse both confirm no loss of consciousness was observed. GCS 15. The encounter is the initial treatment for an acute concussion without loss of consciousness. Note includes current diagnosis of type 2 diabetes which requires monitoring for secondary symptoms like hypoglycemia that could mimic post-concussive daze. Billing Focus: Initial encounter (A). Risk Adjustment: Concurrent management of metabolic conditions affecting recovery.

Billing Focus: Initial encounter (A) and loss of consciousness status.

Specify the episode of care using the seventh character. Use A for the initial encounter while the patient is receiving active treatment. Use D for subsequent encounters during recovery and S for sequelae. Accurate seventh character assignment ensures correct processing of global periods and claim adjudication.

Example: An 18-year-old athlete seen for initial assessment of a head injury sustained during a wrestling match. No LOC reported. Patient reports headache and light sensitivity. This initial encounter involves a comprehensive neurological exam. External cause code W21.89XA is applied. Patient has a history of chronic migraines (G43.909) which is documented as it may exacerbate concussion symptoms. Billing Focus: Seventh character A. Risk Adjustment: Comorbid chronic headache disorder.

Billing Focus: Seventh character A (initial encounter).

Incorporate standardized neurocognitive assessment scores. Documentation of Glasgow Coma Scale (GCS) or Sport Concussion Assessment Tool (SCAT) scores supports the severity of the diagnosis and provides a baseline for monitoring recovery or potential deterioration.

Example: Initial evaluation of concussion without loss of consciousness following a motor vehicle accident. Patient is awake and alert. GCS score documented as 15 (E4, V5, M6). SCAT6 symptom scale score is 42. Billing Focus: Clinical severity documentation. Risk Adjustment: Severe GCS scores (not applicable here but required for higher-tier head injuries) or traumatic brain injury markers.

Billing Focus: Clinical severity and objective scoring.

Document the mechanism of injury with external cause codes. To provide a complete clinical picture for payers and public health tracking, always include the external cause, the place of occurrence, and the activity being performed at the time of injury.

Example: Patient seen for initial treatment of a concussion without loss of consciousness. Injury occurred when the patient tripped over a rug (W18.09XA) at home (Y92.019) while playing with a dog (Y93.K9). No LOC noted. Billing Focus: External cause coding (V, W, X codes). Risk Adjustment: Environmental factors contributing to injury risk in elderly or disabled patients.

Billing Focus: External cause, location, and activity codes.

Detail all associated symptoms to support medical decision making. List symptoms such as headache, nausea, vertigo, and cognitive slowing. This provides evidence for the level of Medical Decision Making (MDM) and the necessity of follow-up care or referrals to specialists.

Example: Patient presents for initial evaluation of concussion without LOC. Symptoms include persistent nausea, photophobia, and vestibular instability. Patient has a baseline of generalized anxiety disorder which is noted as a risk factor for prolonged recovery. Management includes vestibular therapy referral. Billing Focus: Level of MDM supported by symptom complexity. Risk Adjustment: Psychological comorbidities affecting rehabilitation duration.

Billing Focus: Symptom-based complexity for MDM.

Relevant CPT Codes

99203 - Office or other outpatient visit for the evaluation and management of a new patient, which requires a medically appropriate history and/or examination and Low level of medical decision making. When using time for code selection, 30-44 minutes of total time is spent on the day of the encounter.
Appropriate for a new patient presenting with a simple concussion and no complicating comorbidities.
99213 - Office or other outpatient visit for the evaluation and management of an established patient, which requires a medically appropriate history and/or examination and Low level of medical decision making. When using time for code selection, 20-29 minutes of total time is spent on the day of the encounter.
Used for patients previously seen by the practice who present with a new concussion injury.
99204 - Office or other outpatient visit for the evaluation and management of a new patient, which requires a medically appropriate history and/or examination and Moderate level of medical decision making. When using time for code selection, 45-59 minutes of total time is spent on the day of the encounter.
Required when the concussion evaluation involves complex decision making, such as determining the need for imaging or managing high-risk patients.
99214 - Office or other outpatient visit for the evaluation and management of an established patient, which requires a medically appropriate history and/or examination and Moderate level of medical decision making. When using time for code selection, 30-39 minutes of total time is spent on the day of the encounter.
Applied when an established patient has multiple symptoms or comorbidities requiring detailed management and risk assessment.
96132 - Neuropsychological testing evaluation services by physician or other qualified health care professional, including integration of patient data, interpretation of standardized test results and regional data, and decision making; first hour
Used to objectively measure cognitive deficits following a head injury to guide recovery and clearance.
96116 - Neurobehavioral status exam (clinical assessment of thinking, reasoning and judgment, e.g., acquired knowledge, attention, language, memory, planning and self-regulation, and visuospatial abilities) per hour of the psychologist's or physician's time, both face-to-face time with the patient and time interpreting test results and preparing the report; first hour
Supports the clinical diagnosis of cognitive impairment post-injury.
97161 - Physical therapy evaluation: low complexity, requiring a clinical decision-making capacity of low complexity; typically, 20 minutes are spent face-to-face with the patient and/or family
Commonly used for concussion patients with vestibular dysfunction or balance impairments.
99188 - Application of topical fluoride varnish by a physician or other qualified health care professional
While often for pediatrics, screening tools are used to check for cognitive impairment in concussion. Note: 99188 is fluoride; correcting for cognitive screen 96110 or 99483 as applicable in clinical settings.
70450 - Computed tomography, head or brain; without contrast material
Used to rule out intracranial hemorrhage in high-risk patients or those with worsening symptoms.
92002 - Ophthalmological services: medical examination and evaluation with initiation of diagnostic and treatment program; intermediate, new patient
Used when patients report visual disturbances or have abnormal extraocular movements.