Getting TMS (transcranial magnetic stimulation) therapy starts with a psychiatric evaluation confirming you have treatment-resistant depression, followed by insurance authorization and a consultation at a TMS clinic. Most people can begin treatment within one to two weeks of their first consultation, but the process of documenting failed medications and securing insurance approval can take longer depending on your history. Here’s what each step actually looks like.
Who Qualifies for TMS
TMS is FDA-cleared for major depressive disorder in adults who haven’t improved enough from at least one antidepressant medication taken at an adequate dose for an adequate duration. That’s the baseline requirement. You don’t need to have tried five or six medications first, though some insurance plans set a higher bar than the FDA does.
The key phrase is “treatment-resistant,” which in practice means you’ve given at least one antidepressant a fair shot and it didn’t work well enough. A fair shot means taking the medication at the dose your doctor prescribed, for long enough to know whether it would help (typically six to eight weeks). If you stopped a medication early because of side effects, that can also count as a failed trial, since intolerance to psychiatric medications is a recognized qualifying factor under both FDA guidance and Medicare coverage criteria.
TMS has also received FDA clearance for obsessive-compulsive disorder and smoking cessation, though insurance coverage for these conditions is less consistent. Depression remains the most straightforward path to covered treatment.
Step 1: Talk to Your Prescriber
You don’t strictly need a referral to contact a TMS clinic, but having your prescribing psychiatrist or primary care doctor involved makes everything smoother. Your current provider has the medication records that insurance companies will ask for, including the names, doses, and durations of antidepressants you’ve tried. If those records aren’t well documented, you may need to reconstruct that history before moving forward.
If you don’t currently have a psychiatrist, you can reach out to a TMS clinic directly. Many clinics have psychiatrists on staff who can evaluate you during the consultation and document your treatment history themselves.
Step 2: Schedule a TMS Consultation
During the consultation, the clinic team reviews your mental health history, current symptoms, and treatment goals. They’ll collect your full medication history and assess whether you’re a good candidate based on both clinical factors and your insurance plan’s specific requirements.
This is also when the clinic screens for safety concerns. The most important one is metal inside your head. Metallic implants in or near the skull, such as aneurysm clips, metal plates, or certain types of stents, are a serious concern because the magnetic pulses can heat metal objects and potentially shift them. The forces and currents TMS generates are far stronger than those from an MRI, so being “MRI-safe” doesn’t automatically mean an implant is safe for TMS. Cochlear implants and deep brain stimulators are also generally disqualifying. Dental fillings and braces are fine. If you have any metal in your head or neck, bring documentation of what it is so the provider can assess the risk.
A history of seizures is another important factor the clinic will evaluate, since TMS carries a small seizure risk.
Step 3: Get Insurance Authorization
This is often the most time-consuming part. Most insurance plans, including Medicare, require prior authorization before they’ll cover TMS. Your TMS provider submits documentation showing you meet the plan’s criteria: your diagnosis, the medications you’ve tried and how they failed, and your current symptom severity.
Medicare considers TMS medically necessary for severe major depressive disorder when you’ve failed at least one adequate medication trial or can’t tolerate psychiatric medications. Private insurers vary. Some require two or more failed medication trials, and a few still require that you’ve also tried psychotherapy. Ask your TMS clinic what your specific plan requires, since they handle these authorizations regularly and know the common sticking points.
If authorization is denied, most clinics will help you appeal. Denials are often based on incomplete documentation rather than a true disqualification, so a resubmission with better records frequently succeeds.
What TMS Costs Without Insurance
A full course of TMS typically runs between $6,000 and $12,000 out of pocket. Some clinics offer payment plans or sliding-scale pricing. If you have insurance coverage with prior authorization approved, your out-of-pocket cost depends on your plan’s copay and deductible structure, but it’s substantially less. Check whether your plan covers TMS under mental health benefits or durable medical equipment, as the category can affect your cost sharing.
Step 4: Your First Treatment Session
Once you’re approved, you can typically start therapy within five to seven days. The first session is longer than the rest because the provider needs to map the treatment before delivering it.
This mapping process is called motor threshold determination. The technician places the magnetic coil against your scalp and delivers test pulses over the part of your brain that controls hand movement. They’re looking for the lowest pulse intensity that makes your thumb twitch. This threshold becomes the basis for calibrating your treatment intensity. The process involves placing sensors on your hand muscles to detect tiny responses, and the provider adjusts the coil position and power level until they find your personal threshold. Everyone’s is different.
Once the threshold is set, the coil is repositioned over the left prefrontal cortex, the brain region targeted for depression treatment. Treatment begins. You’ll hear a clicking or tapping sound and feel a tapping sensation on your scalp. Some people find it mildly uncomfortable at first, but most adjust within the first few sessions. No anesthesia is involved, and you can drive yourself home afterward.
Treatment Schedule and Duration
The standard protocol involves daily sessions, five days a week, for four to six weeks. Each session lasts roughly 20 to 40 minutes depending on the protocol your clinic uses. That’s a significant time commitment, so it helps to choose a clinic close to your home or workplace.
Accelerated protocols are becoming more common. These compress the full treatment course into two to three weeks by delivering multiple sessions per day. The most well-known accelerated protocol, developed at Stanford, delivers 10 sessions per day over five days. Not every clinic offers accelerated options, so ask during your consultation if the standard schedule doesn’t work for you.
Standard TMS vs. Deep TMS
Two main types of TMS devices are in clinical use, and the clinic you choose will determine which one you receive. Standard repetitive TMS uses a figure-eight shaped coil that stimulates a relatively small, shallow area of brain tissue, reaching about 0.7 centimeters deep and affecting roughly 3 cubic centimeters of brain matter. Deep TMS uses a helmet-style coil that reaches about 3.2 centimeters deep and stimulates around 17 cubic centimeters. The deeper reach doesn’t necessarily mean better results for everyone, but it does allow stimulation of brain structures that the standard coil can’t access directly.
Both types are FDA-cleared for depression. When researching clinics, it’s worth asking which device they use and why they chose it, but neither technology is categorically superior for all patients.
What Results to Expect
TMS works, but it’s not a guarantee. In clinical trials of patients with treatment-resistant depression, roughly 40 to 45% of people experienced a meaningful response, defined as at least a 50% reduction in depression symptoms. Full remission, where symptoms essentially resolve, occurred in about 16 to 22% of patients. These numbers come from people whose depression had already resisted medication, so they represent a population that’s harder to treat.
Most people don’t notice improvement until two to three weeks into treatment. Some respond earlier, some later. If TMS works for you, the benefits typically last several months. Some people schedule maintenance sessions (once weekly or monthly) to sustain the effect, though insurance coverage for maintenance varies.
If you don’t respond to the initial course, some providers will try adjusting the stimulation target or switching from standard to deep TMS before concluding that the treatment hasn’t worked.
Choosing a TMS Provider
TMS clinics exist within psychiatric practices, hospital outpatient departments, and standalone treatment centers. When comparing options, consider proximity to your daily routine (you’ll be going almost every weekday for weeks), the type of device they use, whether they accept your insurance, and whether a psychiatrist supervises treatment or just signs off on it remotely.
Ask how many patients they’ve treated. Clinics with higher volumes tend to be more efficient at insurance authorization and more experienced at coil placement, which can affect treatment quality. Also ask what happens if you don’t respond: whether they offer protocol adjustments, and whether follow-up care is included or billed separately.