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Seasonal Affective Disorder (SAD)

Care for the winter low.

Whole-person support for seasonal affective disorder that looks at light, sleep, and the biology behind the winter dip, by secure video across Washington or in person in Bellevue.

If your mood, energy, and motivation reliably sink as the days get shorter, you are not imagining it. In the Pacific Northwest, the long grey stretch from fall through early spring flattens a lot of people, and seasonal affective disorder is a real, treatable pattern, not a character flaw or something to just push through.

A whole-person approach to seasonal depression

Light matters, and so does the biology underneath. We look at your sleep and circadian rhythm, vitamin D and nutrient status, thyroid, blood sugar, activity, and how the darker months shift all of them, alongside supportive psychotherapy. Bright-light therapy can help, and we fold it into a fuller plan rather than treating it as the only tool.

What we look at

  • Your seasonal pattern: when the dip starts, how deep it goes, when it lifts
  • Light exposure, sleep timing, and circadian rhythm
  • Vitamin D, thyroid, iron, and other nutrient factors that worsen in winter
  • Whether low mood, fatigue, or anxiety travel with it

Get ahead of it

Seasonal patterns are predictable, which is a gift: we can build a plan before the darkest months hit rather than scrambling in January. Care is available by secure video across Washington or in person in Bellevue, led by Dr. Koichi Tanji, ND, LMHC.

Insurance and first steps

We are in-network with Premera, Regence, BlueCross BlueShield, Aetna, Cigna, and Kaiser PPO. To begin, book online or call +1 (425) 278-6166.

If you are in crisis or thinking about harming yourself, please call or text 988 (the Suicide and Crisis Lifeline) or call 911.

Get ahead of the winter low

By secure video across Washington, or in person at our Bellevue clinic. No referral needed.

Book an Appointment
Good to know

Frequently asked questions

What is seasonal affective disorder?

A form of depression that follows a seasonal pattern, typically worsening in darker months, driven by light, circadian rhythm and biological factors.

How is it treated?

Approaches may include light therapy, vitamin D and circadian support, alongside therapy and, when appropriate, medication.

Can lifestyle changes help?

Yes. Light exposure, sleep timing, movement and nutrition meaningfully influence seasonal mood.

Is medication required?

Not always. Many people respond to light and lifestyle approaches, and medication is available when needed.

When should I start?

Ideally before or early in your difficult season. Start with a free 15-minute consultation.

Sphosh Health provides integrated mental health care. Content on this site is for educational purposes and is not a substitute for professional diagnosis or treatment. If you are experiencing a medical or mental health emergency, call 911 or 988 (Suicide & Crisis Lifeline).