Nearly 1 in 5 American adults has depression, yet most go untreated. A board-certified Texas physician explains how depression is diagnosed and treated in primary care — and why telehealth is closing the gap.
By Dr. Casey Dean, DO · Board-Certified Family Medicine Physician · Published 2026-05-12
Nearly one in five American adults — roughly 47.8 million people — currently have depression or are being treated for it, making major depressive disorder one of the most prevalent medical conditions in the United States. Yet despite how common it is, depression remains staggeringly undertreated: an estimated 29.5 million adults with a mental health condition received no treatment in 2024, and research consistently shows that the majority of depression in primary care goes undiagnosed. In Texas, the gap is even wider — more than 80% of Texas counties are designated mental health professional shortage areas, and the state ranks among the worst in the nation for mental health care access. If you have been feeling persistently low, exhausted, or disconnected from the things you used to enjoy, this article is for you — because depression is a medical condition, and it is one of the most treatable diagnoses in all of medicine.
Depression is not a character flaw. It is not laziness, weakness, or a bad attitude. Major depressive disorder (MDD) is a clinical diagnosis defined by the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) as a persistent change in mood and functioning lasting at least two weeks that causes significant distress or impairment in daily life.
At its core, depression involves measurable changes in brain chemistry — particularly in the neurotransmitters serotonin, norepinephrine, and dopamine — as well as alterations in neural circuitry, inflammation, and stress-hormone regulation. It is as biological as diabetes or hypertension, and like those conditions, it responds to medical treatment.
Depression is diagnosed clinically using DSM-5-TR criteria — typically requiring 5 or more symptoms (including either persistent low mood or loss of interest) present nearly every day for at least 2 weeks. Your physician will use validated screening tools (most commonly the PHQ-9), take a detailed history, screen for medical contributors (thyroid dysfunction, anemia, vitamin D deficiency, medication side effects), and rule out bipolar disorder before starting an antidepressant. No blood test diagnoses depression itself, but lab work is often ordered to rule out reversible causes.
Family medicine physicians are trained to diagnose and treat the majority of depression cases. In the United States, primary care providers manage most antidepressant prescriptions. Referral to a psychiatrist is appropriate for treatment-resistant depression, bipolar disorder, psychotic features, severe suicidal ideation, or complex medication regimens — but for typical major depressive disorder, your family physician is fully equipped to evaluate, prescribe, monitor, and adjust treatment.
Most SSRIs and SNRIs take 4–6 weeks at a therapeutic dose to show meaningful improvement, with some patients noticing early effects on sleep or anxiety within 1–2 weeks. Full benefit may take 8–12 weeks. If there is no significant response after 6–8 weeks at an adequate dose, your physician will typically adjust the dose, switch to a different medication, or augment with a second agent. Stopping an antidepressant too early — before 6–12 months of remission — significantly increases relapse risk.
No. SSRIs and SNRIs are not addictive — they do not cause cravings, tolerance, or compulsive use. However, they should not be stopped abruptly because the brain adapts to them and sudden discontinuation can cause withdrawal-like symptoms (dizziness, nausea, 'brain zaps,' irritability). When it's time to stop, your physician will taper the dose gradually over weeks. This is physiological dependence, not addiction.
Yes — depression is one of the most appropriate conditions for telehealth. Diagnosis is based on clinical interview and validated questionnaires, both of which work well over secure video. Texas faces severe mental health workforce shortages — over 80% of counties are designated mental health professional shortage areas — making telehealth often the most accessible path to care. At Trinity Family Medicine, depression evaluation and ongoing medication management is available statewide in Texas via HIPAA-compliant video visits starting at $49.99, with the same physician at every visit. If you are in crisis or having thoughts of self-harm, call or text 988 immediately.