Yes, it is absolutely appropriate and even a thoughtful gesture to give your psychiatrist or psychologist a thank you card on your last visit after four years of treatment. In fact, many mental health professionals appreciate such tokens of gratitude from their patients.
Therapists invest time, effort, and care into helping their patients, and knowing that their work has had a positive impact can be incredibly meaningful to them. A thank you card can convey your appreciation and serve as a heartfelt way to express your gratitude for their support throughout your treatment journey.
In the card, you can mention specific ways they have helped you, share any personal growth you've experienced, or simply express your gratitude for their guidance and assistance. Keep in mind that therapists have their own professional boundaries, so while a thank you card is appreciated, extravagant gifts or deeply personal items might not be appropriate.
Overall, showing appreciation through a thank you card is a thoughtful and respectful way to conclude your therapeutic relationship on a positive note.