Medical Rule Out for Depression: Initial Evaluation Steps

Step 1: Assess for Immediate Safety Concerns

The American College of Physicians recommends evaluating for risk of harm to self or others, which requires immediate emergency psychiatric referral 1, 2, 4
Severe agitation warrants urgent evaluation, according to the American Psychiatric Association 1, 3
Psychosis requires immediate psychiatric consultation, as stated by the American Medical Association 1, 2
Confusion or delirium demands immediate medical evaluation, as recommended by the American College of Emergency Physicians 1, 2, 4

The American Academy of Family Physicians states that medical conditions and substances must be identified and treated before diagnosing primary depression 1, 2, 3, 6
Neurological causes to evaluate include stroke, traumatic brain injury, CNS infections, CNS malignancies, seizure disorders, and neurodegenerative diseases, as recommended by the American Academy of Neurology 7
Metabolic and endocrine disturbances to evaluate include hypoglycemia, hyponatremia, hypocalcemia, and thyroid disorders, as stated by the Endocrine Society 7
Substance-induced causes to evaluate include medication side effects, drug intoxication, and withdrawal states, as recommended by the American Society of Addiction Medicine 1, 2, 3, 7

The American Psychiatric Association recommends distinguishing organic from psychiatric presentation, as organic flat affect can mimic primary psychiatric depression 7
Post-stroke aprosodic speech appears as flat affect but results from neurological damage, not depression, as stated by the American Heart Association 7
Fluctuating presentation suggests delirium rather than primary mood disorder, according to the American College of Physicians 7
Persistent flat affect in the context of neurological findings indicates organic cause, as recommended by the American Academy of Neurology 7

The American Academy of Family Physicians recommends using the PHQ-9 for systematic assessment of depression severity 1, 2, 3, 4
The PHQ-9 score interpretation is as follows: 1-7 (minimal symptoms), 8-14 (moderate symptoms), 15-19 (moderate to severe symptoms), and 20-27 (severe symptoms), as stated by the American Psychiatric Association 1, 5, 9
The American Medical Association recommends referring patients with PHQ-9 scores ≥15 to psychiatry/psychology 5, 9, 10

The American College of Physicians recommends treating unrelieved medical symptoms that may be causing or exacerbating depressive symptoms 2, 6
Many physical symptoms overlap with depression, making it essential to address treatable medical contributors first, as stated by the American Academy of Family Physicians 2, 6

The American Geriatrics Society recommends tailored assessment approaches for older adults, as depression is more difficult to detect and often presents atypically 1, 8, 3
The American Academy of Neurology recommends modified assessment approaches for patients with cognitive impairment 1, 8, 3
The American Psychiatric Association recommends using culturally sensitive assessment tools when possible for culturally diverse patients 1, 8, 3