A TMS program can look ready to launch while a preventable front-end problem is quietly building. Benefits may not be verified, the behavioral health carve-out may handle the authorization instead of the medical plan, or the request may be missing the medication history the payer needs.

Quick answer: Prior authorization for TMS typically requires verified eligibility and TMS benefits, confirmation of the correct medical or behavioral health payer, a complete payer-specific request form, the diagnosis and treatment history, failed or poorly tolerated medication trials, psychotherapy history when required, a baseline PHQ-9 or other standardized score, ordering provider details, the requested CPT codes, and the number of sessions being requested. Do not begin the TMS course until the authorization status, approved codes, units, and effective dates are confirmed in writing.

Why is prior authorization for TMS easy to get wrong?

A growing behavioral health practice can look ready to launch TMS while a front-end problem is already forming.

Then the front desk finds out the behavioral health carve-out, not the medical payer, handles the request. The wrong form was used, the authorization is still pending, and treatment is approaching.

That is how a workable process turns into a denial risk. For TMS, the authorization has to be correct before treatment starts and monitored through the full course.

How do you verify TMS benefits before submitting the authorization?

Start with full benefit verification, not a basic eligibility check.

Confirm all of the following:

• The member is active on the planned date of treatment.
• TMS is a covered benefit under the specific plan.
• TMS is handled under the medical benefit, behavioral health benefit, or another delegated administrator.
• Prior authorization is required for the planned service.
• The practice and ordering provider are in network, if network status affects authorization.
• The patient’s plan has any diagnosis, age, treatment-setting, or session limitations.
• The payer’s required submission channel, such as portal, phone, fax, or a specific form.

A plan can show active coverage while TMS is excluded, limited, or managed elsewhere. Health Net notes that prior authorization requirements are separate from covered benefits, so the practice still has to verify the member’s plan details. Health Net prior authorization requirements

Which payer handles TMS when there is a behavioral health carve-out?

Do not assume the payer on the insurance card handles the request.

Depending on the plan, TMS authorization may involve the medical carrier or a behavioral health organization such as:

• Optum
• Carelon Behavioral Health
• Magellan
• Evernorth Behavioral Health
• A state Medicaid or Medicare Advantage administrator
• Another delegated utilization management vendor

Ask where TMS authorization belongs and confirm the department, form, submission method, and provider requirements. Document the representative’s name or reference number when possible.

Evernorth’s 2026 guidance removed prior authorization for TMS for certain contracted providers with Evernorth or Cigna Healthcare coverage, while generally keeping it for noncontracted providers unless a plan document says otherwise. Evernorth TMS prior authorization FAQ

Do not rely on a general payer rule or an old authorization. Verify the member’s actual plan.

What clinical documentation does a TMS prior authorization usually require?

Payer forms differ, but a complete TMS authorization packet commonly includes:

• The patient’s diagnosis, episode history, and comprehensive psychiatric evaluation
• The ordering or treating provider’s name, credentials, identifiers, and contact information
• Prior antidepressant trials, including medication name, class, dose, dates, duration, response, and reason for discontinuation
• Psychotherapy history and response, when required
• Baseline PHQ-9, MADRS, or another payer-accepted standardized rating scale
• Current impairment, treatment rationale, and the proposed TMS protocol or device details when requested
• Safety screening and any relevant contraindication documentation
• The planned start date, treatment period, CPT codes, and number of units or sessions requested

Do not write “failed several medications” and expect the reviewer to fill in the blanks. A medication history table is stronger when it shows the drug, dose, dates, trial length, outcome, and reason it stopped.

Also confirm that the diagnosis meets the plan’s criteria. A clinically appropriate request can still fail if the diagnosis or indication is not covered under that member’s plan.

Which CPT codes and session counts should be included?

The commonly referenced TMS CPT codes are:

• 90867: Initial TMS treatment, including cortical mapping and motor threshold determination
• 90868: Subsequent TMS treatment session
• 90869: Subsequent TMS treatment with motor threshold redetermination

The authorization request should match the payer’s rules for these codes.

The request should state:

• Which code is needed for the initial session
• How many subsequent sessions are planned
• Whether a motor threshold redetermination may be needed
• The requested start and end dates
• The expected treatment frequency
• Whether taper or additional sessions are being requested

Some plans authorize an initial block and require a second review for more sessions. Others use unit limits or protocol-specific rules, so compare the final approval to what was submitted.

What is the difference between TMS authorization pending and approved?

Pending means the payer has not yet granted permission for the requested service. The request may still be under review, incomplete, routed to the wrong department, or waiting for more information.

Approved means the payer has issued an authorization with defined terms. Those terms may include the approved diagnosis, CPT codes, units, session count, provider, facility, start date, end date, and restrictions.

Pending is not approved.

Starting TMS while the request is pending creates write-off risk. Before the first session, the front desk should have the approval or documented payer confirmation that clearly identifies the approved services.

How do you track a TMS authorization after approval?

Approval is not the end of the workflow. It starts the monitoring phase.

Use one shared tracker for each patient and record:

• Payer and benefit administrator
• Authorization number
• Approved diagnosis and CPT codes
• Authorized units or session count
• Start date and end date
• Sessions used and sessions remaining
• Date of the next follow-up or reauthorization task
• Notes about additional documentation requested

Set reminders before the authorization end date and before approved sessions run out. Do not wait until the last session to start reauthorization.

The front desk should also compare the treatment schedule to the authorization. If the course changes, confirm the current approval still matches the plan of care.

What are common reasons TMS authorizations are denied?

The most common front-end problems include:

• Missing clinical documentation
• Incomplete medication trial history
• No baseline PHQ-9 or required rating scale
• The request was sent to the wrong payer or behavioral health carve-out
• The diagnosis is not covered under the member’s plan
• The CPT code or protocol does not match the payer’s requirements
• The requested session count exceeds the plan’s limit
• The authorization expired before the course was completed
• The ordering provider or treatment location is not correctly identified
• Additional sessions were started without a new authorization

These are usually workflow problems. A standardized intake checklist, payer-specific form library, and shared authorization tracker can prevent many of them.

What should a TMS practice do next?

Build the TMS authorization process around five checkpoints:

1. Verify active coverage and confirm that TMS is covered.
2. Identify the correct medical payer or behavioral health carve-out.
3. Gather the payer-specific form and complete clinical documentation.
4. Submit the correct codes, dates, units, and session count.
5. Confirm approval and track the authorization through the entire course.

Almonord AI Solutions provides front-end patient-access support for behavioral health practices, including insurance verification, TMS prior authorization, credentialing, denial prevention, and front-desk workflow support. We do not provide back-end billing or marketing services.

If you are adding TMS or already seeing authorization gaps, book a free Revenue Leak Audit at almonordaisolutions.com. We will review where verification, authorization tracking, or payer-specific documentation may be putting your practice at risk and identify practical front-end fixes.

Frequently asked questions about prior authorization for TMS

Does TMS usually require prior authorization?

Many plans require prior authorization for TMS, but the requirement depends on the patient’s specific plan, network status, benefit administrator, and current payer policy.

What documents are commonly required for TMS authorization?

Payers commonly request the diagnosis, medication and psychotherapy history, baseline PHQ-9 or another rating scale, provider details, treatment protocol, CPT codes, and requested session count.

Can a practice start TMS while authorization is pending?

A practice should not start a planned TMS course while authorization is pending because the payer may deny the services or approve different terms.

How many TMS sessions should be requested?

Request the number of sessions supported by the patient’s treatment plan and the payer’s current policy, with CPT codes, dates, and any taper or additional-session request clearly identified.

What happens if a TMS authorization expires?

Sessions provided after the authorization end date may not be covered, so the practice should track expiration dates and request reauthorization before the approved period or session count runs out.

This article is for informational purposes only and is not medical, legal, or payer-specific advice. Requirements vary by plan and may change. Always verify current coverage and authorization rules with the patient’s payer before treatment.