Is TMS Right for Me? A Clinical Guide to Knowing If You're a Candidate

TMS is a non-invasive treatment that uses focused magnetic pulses, delivered through a coil placed against the scalp, to stimulate neurons in a targeted region of the brain. The pulses don't reach the deep brain directly, but they modulate activity in the targeted cortex, which in turn affects connected networks involved in mood, attention, and motivation. Treatment is performed in an outpatient setting, with the patient awake. There is no anesthesia, no recovery time, and no cognitive side effects of the kind seen with electroconvulsive therapy (ECT).

As of 2025, the FDA has cleared TMS for several distinct indications:

• Major Depressive Disorder (MDD) in adults (NeuroStar, 2008, first cleared device)
• Obsessive-Compulsive Disorder (OCD) as an adjunct (BrainsWay Deep TMS, 2018)
• Smoking cessation (BrainsWay, 2020)
• Anxious depression, MDD with comorbid anxiety symptoms (NeuroStar/BrainsWay, 2021 to 2022)
• Migraine with aura, a separate single-pulse neurology indication (eNeura, 2013)
• Adolescent MDD (ages 15 to 21, NeuroStar/BrainsWay, 2024 to 2025)

Notably, TMS is not FDA-cleared as a standalone treatment for generalized anxiety, PTSD, bipolar depression, post-concussion syndrome, long COVID, or dysautonomia. Clinics may use it off-label for some of those, but the evidence base and insurance coverage differ.

Who is a good candidate for TMS?

Reputable TMS clinics, and most insurance plans, use a fairly consistent set of criteria when screening candidates for depression-focused TMS. You're likely a strong candidate if you can answer "yes" to most of the following:

• A clinician (psychiatrist, primary care provider, or psychiatric NP) has formally diagnosed you with major depressive disorder. Self-suspected depression doesn't qualify for insurance-covered TMS, even if you're sure that's what you have.
• You've tried adequate trials of at least one, and preferably two or more, antidepressant medications without enough relief. Most commercial insurance plans and Medicare LCDs require documentation of 2 to 4 failed trials in your current episode.
• You've also tried psychotherapy (CBT or another evidence-based form) in addition to medication. This isn't always strictly required but is part of most insurance criteria.
• Your current depression is moderate to severe. Clinicians often use a PHQ-9 score of 15 or higher as a rough threshold.
• You're medically stable, on a steady medication regimen for at least 4 weeks, and not in an acute suicidal crisis requiring inpatient care.
• You don't have any of the safety exclusions listed below.

You can also be a TMS candidate for the other FDA-cleared indications. The clearest one most people miss is OCD. If you have prominent intrusive thoughts or compulsive behaviors alongside depression, TMS for OCD uses a different coil and protocol, and that distinction matters when choosing a clinic.

Who is NOT a good candidate for TMS?

Some exclusions are absolute. TMS isn't safe for you, full stop. Others are relative, meaning your clinician will weigh them with you before proceeding.

Absolute safety exclusions:

• Ferromagnetic or conductive metal in the head or within ~30 cm of the coil, such as aneurysm clips, stents, plates, surgical staples, bullet or shrapnel fragments
• Cochlear implants
• Deep brain stimulators, vagus nerve stimulators, or other implanted brain or neural stimulators
• Active or unmanaged seizure disorder or epilepsy (a remote single seizure may be different, discuss with your doctor)

Relative exclusions, a careful conversation is required:

• Personal or strong family history of seizures, brain tumor, stroke, or vascular lesion
• Medications that lower seizure threshold, including bupropion (high dose), clozapine, tramadol, lithium at high levels, and stimulants
• Active substance use in the past 3 months
• Bipolar I disorder with rapid cycling or mixed features (elevated risk of mania switch)
• Active psychosis or current psychotic-spectrum symptoms
• Pregnancy. Limited safety data exist, and most US clinics decline to treat.

For a deeper look at the safety profile, see Side Effects of TMS: Benefits vs. Risks.

When does depression have an underlying physical cause?

This is the question most TMS clinics skip, and it's the one that matters most for people who've already tried TMS and didn't get the result they hoped for. Depression can be a primary mood disorder, or it can be downstream of a treatable physical condition that needs different care. The latter group often "fails" TMS because the treatment is aimed at the symptom, not the cause.

Watch for these red flag clusters:

Post-concussion or TBI signature. Headaches, sensitivity to light and noise, dizziness or vestibular symptoms, brain fog with word-finding difficulty, and most distinctively, worsening with mental or physical exertion. People often miss the link because the concussion was years (sometimes decades) ago, was never formally diagnosed, or seemed mild at the time. Even one "bell rung" moment from a fall, car accident, or contact sport raises the odds. See Post-Concussion Syndrome: Symptoms and Recovery.

Dysautonomia or POTS signature. Lightheadedness when standing, racing or pounding heart with position change, exercise intolerance, heat intolerance, GI dysmotility (early fullness, nausea, constipation), and feeling significantly better lying down than sitting or standing. These autonomic patterns are not features of primary depression, but they are routinely misdiagnosed as anxiety because the heart racing and chest tightness mimic panic attacks. See Why POTS Is So Often Misdiagnosed as Anxiety.

Long COVID or post-viral signature. Symptoms that began during or after a COVID infection (or other viral illness), with post-exertional malaise, a 12 to 48 hour crash after physical, cognitive, or emotional effort that's disproportionate to what triggered it. Unrefreshing sleep, new shortness of breath, and palpitations are also common. Long COVID roughly doubles the population depression rate, but the mechanism is inflammatory and autonomic, not a primary mood-circuit problem. See Long COVID, POTS, and Dysautonomia.

If any of these patterns sound like you, the most accurate next step isn't another TMS consultation. It's an evaluation that can distinguish primary mood disorder from secondary mood symptoms.

Why does TMS sometimes fail to work?

About one in three patients experiences the TMS dip, a temporary worsening of mood, anxiety, or sleep in weeks 2 to 4, usually resolving within days to two weeks. The dip is not a predictor of treatment failure and is often interpreted as a sign of neural reorganization.

A different question is why some patients complete a full TMS course without meaningful improvement. The peer-reviewed literature identifies several predictors of non-response that are worth knowing:

• Targeting accuracy. The "ideal" TMS target varies by up to several centimeters between individuals, and scalp-based targeting (the 5 cm rule) misses for a meaningful fraction of patients. Antidepressant response correlates with how well the stimulated cortex connects to the brain's subgenual cingulate cortex, a connectivity pattern that's individual to each brain (Fox MD et al. Biol Psychiatry 2012; PMID 22425997).
• Predominantly somatic presentation. Patients whose depression presents mostly as physical symptoms (fatigue, body pain, sleep disturbance) rather than cognitive or affective symptoms tend to respond less well to rTMS. This is one of the strongest tells that a physical condition is driving the mood symptoms.
• Concurrent benzodiazepines, which suppress the cortical excitability TMS depends on.
• No measurable improvement by session 10, which has been shown to differentiate responders from non-responders by session 20.

For more on expected timelines, see How Long Does TMS Take to Work?

How is fMRI-guided TMS different from standard TMS?

Most TMS clinics use either scalp measurements ("5 cm rule") or a fixed anatomical landmark to position the coil. Both approaches assume every brain is the same. fMRI-guided TMS scans your actual brain, identifies the dysregulated network unique to you, and aims the coil at the personalized target.

When fMRI-guided targeting is combined with intermittent theta-burst stimulation (iTBS), a faster pulse pattern that condenses a 37-minute session into about 3 minutes, and an accelerated schedule (multiple sessions per day rather than 6 weeks of daily visits), the results in the published literature are striking.

The Stanford SAINT/SNT protocol is the clearest published demonstration of what's possible when targeting, pulse pattern, and schedule are all optimized. CFX's Precision Mental Health program uses these same principles, fMRI-derived individualized targeting in its own protocol. (CFX's protocol is its own and is not identical to SAINT/SNT.) See also SAINT TMS Locations for context on where this approach is offered.

What should I do if TMS isn't right for me?

The honest answer depends on which bucket you fall into.

If you have a hard safety exclusion (metal in the head, cochlear implant, brain stimulator, active epilepsy), don't pursue TMS without a neurologist or psychiatrist reviewing your specific situation. Many alternative treatments, including non-magnetic options like the EPIC program at Cognitive FX, remain accessible to you.

If your symptoms point to post-concussion syndrome, dysautonomia, or long COVID, the better first step is an evaluation that can directly visualize what's happening in your brain. Cognitive FX uses functional NeuroCognitive Imaging (fNCI) to identify regions of disrupted neurovascular coupling, and the EPIC treatment program addresses the underlying dysfunction in a 1-week intensive. Many CFX patients travel from out of state for this evaluation precisely because most local TMS clinics never screened for these causes.

If TMS failed for you previously, it's worth understanding why before assuming TMS as a category doesn't work. Was the target chosen by scalp measurements or by fMRI? Was the protocol accelerated or standard? Were you on a benzodiazepine that may have suppressed response? These questions can change the answer. See TMS for Treatment-Resistant Depression for more context.

If you haven't yet tried antidepressants or therapy, TMS isn't the standard starting point, and most insurance plans won't cover it as a first-line treatment. Start with your primary care doctor or a psychiatrist. If first-line treatments don't help, that's when the TMS conversation becomes the right one.

Common questions about TMS candidacy

Does insurance cover TMS?

Most US commercial insurance plans and Medicare cover TMS for treatment-resistant major depressive disorder, but coverage typically requires documentation of 2 to 4 failed antidepressant trials plus failed psychotherapy in the current episode. Coverage for OCD, anxious depression, and adolescent indications varies by plan.

Can TMS make depression worse?

About one-third of patients experience the TMS dip, a temporary worsening that usually resolves within days. Sustained worsening is less common but can happen, particularly in people with undiagnosed bipolar disorder (where TMS can trigger a manic switch) or in people whose mood symptoms are downstream of an unaddressed physical cause. See Can TMS Make Anxiety Worse?

How do I know if I'm a candidate before I commit?

The fastest screen is the free 2-minute candidacy quiz below. It walks you through the same questions a clinician would ask in an initial intake, including the red-flag questions most TMS clinics skip.

Is TMS the same as ECT?

No. ECT (electroconvulsive therapy) uses electrical current and induces a brief seizure under general anesthesia. TMS uses magnetic pulses, is performed awake in an outpatient chair, and does not induce seizures (except as a rare adverse event). TMS has no anesthesia recovery, no memory side effects, and a much shorter session duration.

Can I have TMS if I had a concussion?

A remote, recovered concussion is not an absolute contraindication. But if you have active post-concussion symptoms, such as headaches, brain fog, or vestibular issues, depression-focused TMS is unlikely to resolve them, because the depression in that case is downstream of the brain injury. A different evaluation is usually the better first step.

Is TMS covered for OCD or just depression?

TMS is FDA-cleared for OCD as a separate indication using a different coil and protocol. Coverage for OCD varies more than depression coverage. Check with your insurance and with any clinic you're considering.

References

1. Fox MD, Buckner RL, White MP, Greicius MD, Pascual-Leone A. Efficacy of transcranial magnetic stimulation targets for depression is related to intrinsic functional connectivity with the subgenual cingulate. Biol Psychiatry. 2012;72(7):595–603. PMID 22425997
2. Blumberger DM, Vila-Rodriguez F, Thorpe KE, et al. Effectiveness of theta burst versus high-frequency repetitive transcranial magnetic stimulation in patients with depression (THREE-D): a randomised non-inferiority trial. Lancet. 2018;391(10131):1683–1692. PMID 29726344
3. Cole EJ, Stimpson KH, Bentzley BS, et al. Stanford Accelerated Intelligent Neuromodulation Therapy for Treatment-Resistant Depression. Am J Psychiatry. 2020;177(8):716–726. PMID 32252539
4. Cole EJ, Phillips AL, Bentzley BS, et al. Stanford Neuromodulation Therapy (SNT): A Double-Blind Randomized Controlled Trial. Am J Psychiatry. 2022;179(2):132–141. PMID 34711062
5. Carpenter LL, Janicak PG, Aaronson ST, et al. Transcranial magnetic stimulation (TMS) for major depression: a multisite, naturalistic, observational study of acute treatment outcomes in clinical practice. Depress Anxiety. 2012;29(7):587–596. PMID 22689344