Z87.820

Personal history of traumatic brain injury

Z87.820 is a clinical classification used to document a patient's past medical history of a traumatic brain injury (TBI). This code is appropriate for patients who have previously sustained a TBI (ranging from mild concussions to severe penetrating injuries) and are no longer in the acute phase of treatment, though they may or may not experience residual sequelae. Clinical awareness of a history of TBI is paramount for long-term health management, as it serves as a critical indicator for increased risks of post-traumatic epilepsy, neurodegenerative diseases (such as Chronic Traumatic Encephalopathy), and neuropsychiatric disorders. In clinical practice, this code assists in risk stratification for surgical anesthesia, guides return-to-play or return-to-work protocols, and informs the evaluation of new-onset neurological or cognitive complaints. It distinguishes between patients with a history of simple head trauma without brain involvement and those with documented brain tissue injury.

Clinical Symptoms

Cognitive deficits including memory loss or executive dysfunction
Chronic post-traumatic headaches or migraines
Post-traumatic epilepsy or lowered seizure threshold
Residual vestibular dysfunction and balance instability
Emotional lability, irritability, or personality changes
Sensory processing sensitivities (photophobia or phonophobia)
Sleep architecture disturbances or insomnia
Tinnitus or persistent hearing changes
Difficulty with sustained attention and mental fatigue
Aphasia or subtle speech and language impairments

Common Causes

Previous falls from heights or on level ground
Historical motor vehicle, motorcycle, or pedestrian-vehicle accidents
Prior sports-related concussions or high-impact athletic collisions
Past physical assaults or domestic violence incidents
History of blast injuries or combat-related trauma
Struck-by-object injuries in occupational settings
Penetrating injuries (e.g., historical gunshot wounds or shrapnel)

Documentation & Coding Tips

Distinguish between personal history and active sequelae to ensure accurate code selection.

Example: Patient seen for management of recurrent tension headaches. Past medical history is significant for a severe traumatic brain injury in 2012 following a fall from height, which resulted in a subdural hematoma requiring evacuation. Patient has no current cognitive or motor deficits related to that event. History of TBI is noted as a relevant risk factor for current neurological status. Diagnosis: Personal history of traumatic brain injury (Z87.820).

Billing Focus: Documentation must specify that the acute phase of the injury has resolved and no current sequelae (late effects) are being actively treated as the primary focus of the visit.

Incorporate the mechanism and severity of the original injury when documenting history for longitudinal care.

Example: A 45-year-old male presents for a physical exam. He has a remote history of a moderate traumatic brain injury (TBI) from a 2005 motor vehicle accident involving a 15-minute loss of consciousness. He underwent extensive rehabilitation and is currently asymptomatic. History of TBI (Z87.820) is relevant for future risk assessment of neurodegenerative processes.

Billing Focus: While Z87.820 is a non-specific history code, clinical granularity regarding the original LOC and injury type supports medical necessity for periodic neurological surveillance.

Clarify that the TBI is a historical event rather than a current injury undergoing active treatment.

Example: Patient is here for preoperative clearance for elective knee surgery. History includes a traumatic brain injury sustained during military service in 2010. Neuropsychological status is stable, and the patient has been cleared by neurology. Diagnosis includes Personal history of traumatic brain injury (Z87.820).

Billing Focus: Use Z87.820 only when the patient is not presenting with a current concussion or intracranial injury. For encounters focused on late effects like post-traumatic epilepsy, use the specific S06 code with the 7th character S.

Avoid using history codes if the patient still presents with chronic deficits directly resulting from the TBI.

Example: Patient presents for follow-up of post-concussional syndrome with associated cognitive deficits. Though the injury occurred three years ago, the patient continues to experience active symptoms. I am coding the sequelae S06.9X9S instead of Z87.820 because the patient has persistent neurological deficits.

Billing Focus: Z87.820 is specifically for a history of a condition that no longer exists in an active or late-effect symptomatic form.

Document the absence of current neurological symptoms to justify the use of a history code.

Example: Follow-up for hypertension management. Patient history includes a closed head injury TBI in 1994. Patient denies any current memory loss, seizures, or motor weakness. He is neurologically intact on exam. Personal history of traumatic brain injury (Z87.820) added to the problem list for completeness.

Billing Focus: Documenting a negative review of systems for neurological symptoms supports that the TBI is indeed a personal history and not an active condition.

Relevant CPT Codes

99213 - Office or other outpatient visit for the evaluation and management of an established patient, which requires a low level of medical decision making or 20-29 minutes of total time spent on the date of the encounter
Used for stable patients where the history of TBI is noted but does not significantly increase complexity.
99214 - Office or other outpatient visit for the evaluation and management of an established patient, which requires a moderate level of medical decision making or 30-39 minutes of total time spent on the date of the encounter
Appropriate when the provider must evaluate how the TBI history interacts with new or chronic symptoms.
96132 - Neuropsychological testing evaluation services by physician or other qualified health care professional, first hour
Used to establish a baseline or monitor for cognitive decline in patients with a known history of TBI.
99483 - Assessment of and care planning for a patient with cognitive impairment
Indicated for patients with a history of TBI who are now showing signs of cognitive decline or dementia.
90791 - Psychiatric diagnostic evaluation
Used to evaluate psychiatric symptoms (like PTSD or depression) in a patient with a history of TBI.
70551 - Magnetic resonance (eg, proton) imaging, brain; without contrast material
May be ordered to evaluate for chronic structural changes in a patient with a history of TBI.
95819 - Electroencephalogram (EEG); routine, awake and asleep
Ordered if a patient with a history of TBI develops new-onset seizure-like activity.
97161 - Physical therapy evaluation: low complexity
Assesses balance and gait in patients where a history of TBI may contribute to current mobility issues.
92002 - Ophthalmological services: medical examination and evaluation with initiation of diagnostic and treatment program; intermediate, new patient
Used to evaluate long-term visual field or ocular motor changes following TBI history.
99212 - Office or other outpatient visit for the evaluation and management of an established patient, which requires a straightforward level of medical decision making or 10-19 minutes of total time spent on the date of the encounter
Used when the history of TBI is updated in the medical record during a simple visit.