TMS may reduce depression symptoms for some people, especially when medication or therapy has not helped enough, but results vary and may range from response to remission.
Does TMS work for depression?
Transcranial magnetic stimulation (TMS) can help some people with major depressive disorder, particularly when depression has not improved enough with medication, talking therapy, or both. It is not a guaranteed treatment, and it does not work in the same way for everyone.
TMS uses magnetic pulses delivered through a device placed against the scalp. The pulses are intended to stimulate brain networks involved in mood regulation. Treatment is usually given on weekdays, often as a course of around 36 sessions over six to nine weeks.
TMS was cleared by the US Food and Drug Administration (FDA) for major depressive disorder in 2008. In 2021, FDA clearance was expanded to include depression with comorbid anxiety symptoms. These clearances reflect evidence that TMS can be an appropriate treatment option for selected patients, but they do not mean that every person will have the same result.
When people ask whether TMS “works”, the most honest answer is that it may lead to meaningful improvement for some patients, while others have a smaller change or no clear benefit. Clinicians and studies usually describe results using the terms response and remission.
What does “response” mean?
In TMS research and clinical practice, a response usually means that depressive symptoms have reduced substantially from where they were at the start of treatment.
Symptoms may be measured using questionnaires or clinician-led rating scales. These assessments can cover areas such as:
- Low mood
- Loss of interest or pleasure
- Sleep changes
- Fatigue
- Concentration difficulties
- Appetite changes
- Feelings of guilt or hopelessness
- Thoughts of death or self-harm
A response does not necessarily mean that all symptoms have gone away. Someone may still have depression after treatment, but feel noticeably better than before. For example, they may find it easier to get out of bed, return to work, manage daily responsibilities, reconnect with people, or benefit more from therapy.
Response can be an important outcome. Depression does not always lift in a single step, and a substantial reduction in symptoms may still improve quality of life and make ongoing treatment more manageable.
What does “remission” mean?
Remission generally means that a person’s symptoms have reduced to a level where they no longer meet the usual threshold for an active depressive episode, or where only minimal symptoms remain.
In everyday language, remission may be described as feeling well, feeling like oneself again, or no longer being significantly limited by depression. However, remission does not necessarily mean that depression can never return. Major depressive disorder can be recurrent, and some people need continued care after a successful TMS course.
That care may include medication, psychotherapy, regular reviews with a psychiatrist or GP, healthy routines, or a plan for recognising early signs of relapse. In some circumstances, clinicians may also discuss whether further TMS could be appropriate if symptoms return.
Response and remission are both useful measures, but they describe different levels of improvement:
- Response: symptoms have improved substantially.
- Remission: symptoms have reduced to minimal levels or are no longer causing significant depressive illness.
A person can respond without reaching remission. Another person may reach remission after responding gradually over the course of treatment.
What do published TMS trials report?
Published clinical trials of TMS for depression generally report that a proportion of participants experience a meaningful reduction in symptoms, and that a smaller proportion reach remission. Results differ between studies because they do not all use the same type of TMS, treatment schedule, patient group, symptom scale, or definition of improvement.
This is why it is sensible to be careful with headlines or simple success-rate claims. A figure quoted by one clinic, website, or study may not apply directly to another person’s situation.
For example, published evidence may involve people with different levels of treatment-resistant depression. Some participants may be taking antidepressants during TMS, while others may have different medication arrangements. Some studies focus on standard repetitive TMS protocols, while others examine newer or differently structured approaches. Follow-up periods also vary.
The overall picture from the research is not that TMS works for everyone, nor that it is only helpful for a rare few. Rather, it is an established option that can produce meaningful improvement for some people with depression, including people who have not had enough benefit from previous treatments.
A clinician should be able to explain what treatment approach they are recommending, how they will measure progress, and what they would consider a reasonable next step if improvement is limited.
Why individual TMS results vary
Depression is not a single, uniform illness. Two people may both have the same diagnosis but very different symptom patterns, medical histories, stressors, medication experiences, and treatment needs. This is one reason results vary.
Factors that may influence an individual’s experience include:
- How severe and long-standing their depression is
- Whether they have previously responded to medication, therapy, or other treatments
- The presence of anxiety symptoms or other mental health conditions
- Physical health conditions and current medicines
- Alcohol or substance use
- Sleep, daily routine, and major life pressures
- Whether treatment sessions can be attended consistently
- The TMS protocol chosen and how it is delivered
- Whether TMS is used alongside other appropriate care
It is also possible for progress to appear at different points in treatment. Some people notice changes relatively early, while others do not notice a meaningful difference until later in the course. A clinician will usually monitor symptoms during treatment rather than waiting until the final session to assess whether it is helping.
Improvement may not be linear. A person can have better days and worse days while still making overall progress. It can be useful to keep track of mood, sleep, activity, and functioning, rather than relying only on how a single day feels.
Questions to ask before starting TMS
A consultation is an opportunity to discuss whether TMS is appropriate for you, not simply to arrange treatment. Useful questions include:
- What diagnosis and symptoms is TMS intended to address?
- Why do you think TMS may be suitable in my case?
- Which TMS protocol do you recommend and why?
- How will you measure response during treatment?
- What would count as a good outcome for me?
- What happens if I do not improve?
- Should I continue my current medication or therapy?
- What follow-up or relapse-prevention plan is available?
TMS is generally delivered without anaesthesia, and people normally return home after each appointment. Common side effects include scalp discomfort and headache. Seizure is rare, but it is still important to discuss your medical history and any potential risks with a qualified clinician.
Accessing TMS in California
California has a large number of listed TMS providers, but availability, assessment processes, treatment approaches, and insurance arrangements can differ. TMS Therapy California currently lists 382 published clinics across the state.
Directory listings include clinics in many California communities. Among the cities with the largest directory counts are Los Angeles, San Diego, Carlsbad, Sacramento, San Jose, Long Beach, Aliso Viejo, Chula Vista, Simi Valley, Roseville, Irvine, and Davis.
Insurance coverage depends on the individual plan, clinical criteria, referral requirements, and provider network. Carriers commonly seen in California include Blue Shield of California, Anthem Blue Cross of California, Kaiser Permanente, UnitedHealthcare, Aetna, Cigna, Health Net, Medi-Cal managed care plans, Medicare through Noridian Jurisdiction E, and TRICARE West. Before committing to treatment, ask both the clinic and your insurer about authorisation requirements, eligibility, network status, and any expected out-of-pocket costs.
Getting help in California
Use the TMS Therapy California clinic listings to find local providers, read the insurance guide for practical coverage information, or visit the contact page for help using the directory.
This is educational information, not medical advice.
This page is informational and is not medical advice.