TMS has emerged as a revolutionary tool in the treatment of Depression, offering hope for those who have not benefited from other therapies. A key question often posed by both patients and practitioners is: how many sessions for TMS to work most effectively? Understanding how many TMS sessions are needed is essential for setting realistic expectations and achieving the best possible outcomes.
This article addresses what the latest research says about longer TMS treatment courses and the optimal number of TMS sessions required to achieve the best therapeutic outcome, paving the way for personalized Depression management. We’ll unpack how additional sessions can make the difference between partial and full recovery, and how our office advocates for patients during the recovery process.
If you’re looking for help for you, a loved one, or a patient in New York City, you can contact Mid City TMS by calling 212-517-1867 or by filling out our contact form today.
New Research Suggests Additional TMS Sessions May Be Needed to Help Some Patients Respond
Typically, TMS treatment involves a course of about 30 sessions, followed by several taper sessions. But what happens when someone who shows improvement during TMS yet hasn’t reached full response by the 30th session? Should treatment stop, or could additional sessions help them achieve meaningful recovery?
A recent clinical analysis published in the journal Transcranial Magnetic Stimulation examined exactly this question. The findings suggest that extending TMS treatment beyond the traditional 30 sessions may help some patients convert from non-response to response, offering an important new perspective on optimizing outcomes for Depression treatment.
Understanding Treatment-Resistant Depression
Before exploring the study, it’s helpful to understand the challenge of treatment-resistant Depression.
Depression affects mood, motivation, cognition, sleep, appetite, and the ability to function in daily life. In severe cases, it can lead to disability, relationship strain, and increased risk of suicide.
Standard treatments include:
- Antidepressant medications
- Psychotherapy
- Lifestyle interventions
- Combination treatment approaches
While many patients benefit from these treatments, a significant subset of individuals do not achieve adequate symptom relief even after multiple medication trials. This group is commonly referred to as having treatment-resistant Depression.
TRD is complex and heterogeneous. Factors that may contribute include:
- Biological differences in brain circuits
- Genetic factors
- Chronic stress or trauma
- Co-occurring medical or psychiatric conditions
- Variability in how individuals metabolize medications
Because of these complexities, clinicians often turn to advanced treatments such as neuromodulation therapies, including TMS.
What Is TMS Therapy?
Transcranial Magnetic Stimulation is an FDA-approved treatment for Major Depressive Disorder that works by targeting neural circuits involved in mood regulation.
During a TMS session:
- A specialized coil is placed against the scalp.
- Magnetic pulses stimulate the left dorsolateral prefrontal cortex, an area often underactive in Depression.
- These pulses modulate brain activity and help normalize dysfunctional mood circuits.
Unlike electroconvulsive therapy (ECT), TMS:
- Does not require anesthesia
- Does not cause seizures
- Allows patients to return to normal activities immediately after treatment
A typical course of TMS involves:
- 30 daily sessions (Monday–Friday) over about 6 weeks
- Each session lasts between 3–20 minutes
- Daily sessions are followed by a short taper phase to maintain gains
Clinical studies show that over half of patients experience significant improvement with prolonged rTMS treatment, and many achieve remission. However, some individuals show partial improvement without reaching the threshold for clinical response.
How Many Sessions for TMS to Work? Why Session Count Matters
While some patients experience rapid improvement within the first few weeks, others need more time. Like physical therapy for the brain, TMS works through repeated, consistent sessions that gradually retrain and strengthen neural pathways.
The question of “how many sessions for TMS to work?” has been studied extensively and understanding how many TMS sessions are needed represents a critical factor for achieving lasting relief. The evidence shows that symptom improvement is cumulative, meaning patients continue to improve the longer treatment continues.
Stopping too early may reduce effectiveness, as ending treatment while symptoms are still improving risks relapse. Research also indicates that more sessions often equal better outcomes, with patients who continue beyond the minimum frequently achieving deeper, longer-lasting relief.
Should TMS Stop After 30 Sessions? How Many Sessions of TMS Are Needed?
Traditionally, many TMS protocols are structured around a 30-session course. This number emerged from early clinical trials and regulatory guidelines.
However, clinical practice has revealed an important reality: some patients show steady improvement during treatment but simply need more time to reach full response. Stopping treatment at session 30 in these cases may mean discontinuing therapy just before meaningful recovery occurs.
Researchers, therefore, wanted to determine whether extending treatment could convert partial responders into full responders.
The Study: Extending TMS Sessions
A recent retrospective study examined real-world TMS treatment data to explore whether extending treatment could improve outcomes. Researchers analyzed 485 TMS treatment courses and identified 40 cases in which the acute course was extended beyond the standard 30 sessions because patients had not yet achieved response. In these cases, the treatment course was extended by at least 5 additional sessions, sometimes more.
The key outcome measured was clinical response, defined as a 50% reduction in Depression symptoms based on the Inventory of Depressive Symptomatology Self-Report (IDS-SR).
Key Findings: Additional TMS Sessions May Be Needed to Convert Non-Responders
The results of the study were striking. Among the extended treatment cases:
- 21 treatment series converted from non-response to response after additional TMS sessions.
- These represented 17 unique individuals who had not responded after the initial 30 treatments.
- Additional sessions beyond the standard protocol helped many of these patients reach the threshold for meaningful clinical improvement.
In other words, patients who had not responded by session 30 were still able to achieve response with further treatment. This finding challenges the idea that TMS success or failure must be determined by the traditional treatment endpoint, and it represents a major development in our understanding of how many sessions of TMS are needed for patients.
Who Benefits Most From Extended TMS Sessions?
The researchers also investigated predictors of who might benefit from extending TMS treatment with additional sessions. The strongest predictor was how much improvement a patient had already shown by session 30.
Patients who demonstrated partial improvement during the first 30 treatments were significantly more likely to convert to full response when additional sessions were added. Specifically, a 26% reduction in Depression symptoms by session 30 predicted later response with about 77.5% accuracy.
This suggests that patients who show early improvement—but have not yet reached full response—may benefit the most from extending treatment. When considering how many TMS sessions are needed to determine the treatment’s viability, clinicians should recognize that it could take 35 treatments or more for some patients to achieve a full response.
In contrast, patients with little or no improvement during the initial course may require different treatment strategies.
Why Might Some Patients Need More TMS Sessions?
Depression involves complex brain circuits and neuroplastic processes. TMS works by gradually modifying neural activity over time. For some individuals, these changes may simply require more stimulation sessions to accumulate sufficient therapeutic effects.
Several factors may explain why extended TMS treatment helps certain patients:
1. Neuroplasticity Takes Time
TMS promotes neuroplasticity, the brain’s ability to reorganize and form new neural connections. For some patients, this process may unfold more slowly.
2. Severity of Depression
Individuals with more severe or chronic Depression may require a longer stimulation course to achieve meaningful changes in brain networks.
3. Biological Differences
Every brain is different. Genetic factors, inflammation, and neurotransmitter systems can influence treatment response.
4. Cumulative Therapeutic Effects
Like physical therapy for the brain, repeated sessions build upon one another. Extending TMS treatment allows these cumulative effects to reach a therapeutic threshold.
Clinical Implications for Patients Determining How Many Sessions of TMS Are Needed
The study’s findings carry important implications for patients undergoing TMS therapy.
- TMS treatment should be individualized. Rather than rigidly ending treatment after a fixed number of TMS sessions, clinicians may consider individual symptom trajectories when deciding whether to extend therapy.
- Partial improvement is encouraging. Patients who notice gradual improvement during treatment—even if modest—may still have a high likelihood of achieving response with additional sessions of TMS.
- There is hope for initial non-responders. Perhaps most importantly, the study demonstrates that not responding by session 30 does not necessarily mean TMS has failed. For some patients, simply continuing treatment can make the difference between persistent symptoms and meaningful recovery.
TMS and the Future of Personalized Depression Treatment
Research in neuromodulation is rapidly evolving. Clinicians are increasingly moving toward personalized treatment protocols rather than fixed, one-size-fits-all approaches.
Potential future developments include:
- Adaptive treatment durations
- Brain imaging–guided targeting
- Accelerated TMS protocols
- Combination therapies with medications or psychotherapy
- Biomarkers predicting response
These innovations aim to optimize Depression treatment outcomes while minimizing unnecessary interventions. Extending TMS sessions when appropriate is one step toward a more individualized model of care.
The Mid City TMS Approach: 36 Sessions and Beyond
At Mid City TMS, we don’t believe in a one-size-fits-all approach when it comes to how many TMS sessions are needed. Instead, we tailor each treatment plan to the individual patient. Here’s how:
- Every patient receives at least 35 sessions, the evidence-based standard. When examining how many sessions for TMS to work, we understand that every patient has unique needs.
- Progress is carefully monitored with tools like the BDI and PHQ-9, clinical evaluations, and regular check-in follow up appointments with Dr. Bruno.
- If improvement is ongoing, treatment continues when warranted; we try not to stop care when more TMS sessions could bring additional benefit.
- We advocate for insurance coverage. Our team handles authorizations and appeals so patients can often continue treatments beyond the usual 30 session course and are authorized by insurance.
This 35-session commitment ensures that every patient has the best possible chance of achieving full and lasting relief from Depression.
More Sessions, More Relief, More Hope with Mid City TMS
Patients throughout New York City choose Mid City TMS for more than just our expertise; they choose us for our commitment to personalized, patient-first care. When exploring how many sessions for TMS to work most effectively, we offer evidence-based treatment plans tailored to your unique needs, with a minimum of 35 sessions and extensions when clinically indicated. Our team provides direct insurance advocacy to secure coverage for extended treatment, and our convenient NYC location is accessible for patients across the city.
Depression is one of the most challenging conditions to live with, but research and clinical experience confirm a hopeful message: TMS works, and longer courses can provide relief to even more patients. We believe no one should have to stop TMS therapy just as they’re beginning to improve, and we work tirelessly to discover how many TMS sessions are needed for each of our patients.
If you are searching for TMS therapy in New York City and want a treatment center that combines cutting-edge science with compassionate care, Mid City TMS is here for you. Contact Mid City TMS today to schedule your consultation and take the first step toward lasting relief.
Sources
- Chen, X., et al. Depressive symptom trajectories with prolonged repetitive transcranial magnetic stimulation (rTMS) treatment. Brain Stimulation. 2024. https://www.brainstimjrnl.com/article/S1935-861X%2824%2900068-8/fulltext?dgcid=raven_jbs_aip_email
- Lew, B. J., Tirrell, E., Fukuda, A. M., Murugan, N., Perez, C., Griffith, W., & Carpenter, L. L. Identifying patients with non-response for an extension of TMS treatments for depression: A retrospective analysis of clinical response conversion. Transcranial Magnetic Stimulation. 2025. https://www.sciencedirect.com/science/article/pii/S305052912500008X.