Do You Need a Psychiatrist, a Therapist, or Both?
By Lance Demaline • July 31, 2026
Quick Answer: They do different jobs. A therapist treats symptoms through structured talk therapy. A psychiatrist or psychiatric nurse practitioner diagnoses, prescribes medication, and oversees medical treatments like TMS and Spravato. For moderate to severe depression and for OCD, most people do best with both. Which one you start with depends on your symptoms and what you've already tried.
The question usually comes up at a practical moment: you've decided to get help and you're looking at two categories of provider with overlapping titles, or you've been seeing one of them for a while and you're not getting better. The distinction matters more than it looks, particularly if you're heading toward treatments that require a specific kind of prescriber. Here's who does what, when you need both, and where our own program fits.
What a therapist does
Therapists deliver structured psychotherapy. Depending on their training, that might be cognitive behavioral therapy (CBT), exposure and response prevention (ERP) for OCD, or trauma-focused approaches like EMDR or prolonged exposure. Sessions are usually weekly and run about an hour.
Therapists in Ohio don't prescribe medication. That's the clean dividing line.
What therapy is good at: changing the patterns that keep symptoms running, processing trauma, and building skills you keep after treatment ends. For OCD in particular, ERP isn't a nice-to-have alongside medication. It's a first-line treatment in its own right.
What a psychiatrist does
A psychiatrist is a medical doctor (MD or DO) who completed medical school, a psychiatric residency, and in many cases board certification. They diagnose, prescribe and manage medication, and oversee medical treatments including TMS and Spravato. Some psychiatrists also provide therapy, though many focus on medication and interventional treatment and work alongside therapists.
A psychiatric nurse practitioner (PMHNP) is an advanced practice registered nurse with specialist psychiatric training who can evaluate, diagnose, and prescribe. In practice, a PMHNP working within a psychiatrist-led practice covers much of the same ground for straightforward medication management, with the medical director available for more complex cases. That's the model here: Dr. Mark Blair, MD, board-certified psychiatrist and Medical Director, with a psychiatric nurse practitioner providing medication management.
When you need both
For moderate to severe depression, combining medication with therapy generally works better than either on its own. They're doing different things. Medication addresses the biology; therapy addresses what you do with your days, your thinking, and your relationships. Neither substitutes for the other.
For OCD, the standard combination is an SSRI plus ERP therapy. Medication alone tends to take the edge off without teaching you how to stop the compulsions.
For PTSD, trauma-focused psychotherapy does the primary work, with medication supporting sleep, mood, and anxiety while you do it.
If you're only seeing one and you've plateaued, adding the other is often the change that moves things, not another dose adjustment.
Does it matter who prescribes?
For a first antidepressant, often not much. Primary care physicians prescribe antidepressants routinely and are a perfectly reasonable place to start.
It starts to matter in three situations:
- When treatment isn't working. Several failed medication trials is the point where diagnostic review by a psychiatric specialist adds something a routine refill appointment can't.
- When the diagnosis may be incomplete. Bipolar spectrum illness, OCD, and PTSD respond to different treatment than unipolar depression, and mistaking one for the other costs years.
- When you're moving toward interventional treatment. This is where credentials become a practical hurdle rather than a preference.
TMS and Spravato both sit inside specific clinical and regulatory frameworks. Spravato can only be given at a certified treatment center under supervision, which is not something any prescriber can arrange. TMS is FDA-cleared for depression and covered by most major insurance plans when criteria are met, but those criteria include requirements around evaluation and oversight, and plans vary in how they define them.
The practical consequence: if you've been told you don't qualify for TMS, it's worth finding out whether the reason was clinical or administrative. Those have very different fixes. A clinical exclusion means the treatment genuinely isn't appropriate for you. A documentation or credentialing issue means the treatment might be appropriate and the paperwork didn't support it. Ask which one it was, and bring that answer to your next consultation.
At Optimum, TMS and Spravato are prescribed and overseen by a board-certified psychiatrist, and benefits are verified before you commit to anything.
Still weighing your options?
A quick consultation answers more than another hour of reading.

What our medication management program does and doesn't cover
Our psychiatric medication management program is for patients whose primary concern is depression or OCD and who don't currently have a prescribing provider. Co-occurring anxiety or PTSD symptoms are fine.
It's a focused program rather than a general outpatient psychiatry clinic, and being straight about that saves people a wasted appointment. It is not intended for:
- ADHD evaluation, stimulant medication, or ongoing ADHD medication management
- Bipolar disorder or psychosis
- Active substance use treatment
- Emergency psychiatric care
- Complex medication regimens outside our defined scope
We also don't initiate benzodiazepines for routine daily use or long-term treatment of anxiety, insomnia, or stress-related symptoms. Patients already taking them may be evaluated case by case, and continuation isn't guaranteed.
If your needs fall outside this, we'll say so at the screening stage and point you toward a provider who's a better fit. That's a faster answer than finding out at your third visit. We don't provide therapy in-house. When therapy is part of what you need, we'll refer you to a therapist and coordinate with them, including ERP and trauma-focused specialists.
Where to start, depending on your situation
- No prescriber, and depression or OCD is the main issue. Start with a psychiatric medication management evaluation.
- You have a prescriber, and the medication isn't working. Ask for a psychiatric evaluation for TMS or Spravato. You can also take the Find Your Treatment Fit questionnaire first.
- Your main issues are grief, relationships, coping, or life circumstances. Start with a therapist.
- OCD. Look for an ERP-trained therapist, and get medication assessed alongside it.
- ADHD or concentration is your main concern. See a provider who offers ADHD-focused care. That isn't us.
- You're in crisis. Call or text 988, or go to your nearest emergency department.
Can my primary care doctor keep prescribing my antidepressant while I do TMS?
Usually yes. TMS is typically done alongside existing medication, and your prescriber stays involved. Coordination between providers matters, so tell each one what the other is doing.
Do I need a therapist to start TMS or Spravato?
No. Therapy isn't a requirement for either, though it's frequently recommended and it tends to improve how well people hold onto gains afterward.
What's the difference between a psychiatrist and a psychiatric nurse practitioner?
Training route, mainly. A psychiatrist is a medical doctor with psychiatric residency training. A PMHNP is an advanced practice nurse with specialist psychiatric training. Both evaluate, diagnose, and prescribe.
Do I need a referral to be seen?
No referral is needed. If you already have a therapist or primary care provider, they stay in the picture.
What if I'm already seeing a psychiatrist elsewhere?
That's fine for a TMS or Spravato consultation, which is a separate question from who manages your day-to-day medication. Our medication management program is specifically for patients who don't currently have a prescriber, so we'd generally leave that relationship where it is.





















