TMS Billing Guide: Codes, Authorizations, and Denials

TMS billing requires the clinical, authorization, and billing teams to keep the patient’s treatment course aligned from the first session through the final claim.

A patient may receive approval for transcranial magnetic stimulation (TMS), begin treatment, and complete several sessions before a claim suddenly denies midway through the course.

That denial does not necessarily mean the patient’s plan excludes TMS. The approved units may have run out. The authorization period may have expired. The CPT code, rendering provider, or service location may differ from what the payer approved.

For a treatment course that can span several weeks, practices need to ask more than, “Was TMS approved?”

They should ask:

Does each completed treatment still match the patient’s coverage, authorization when required, clinical documentation, and submitted claim?

That question connects the clinical, authorization, and billing teams. When those teams work from different information, a small discrepancy can create multiple denials.

Coverage and billing requirements vary by payer, plan, Medicare Administrative Contractor, location, and date of service. Always verify the current payer policy, applicable Medicare guidance, and coding requirements before submitting claims.

TMS Billing Codes: CPT 90867, 90868, and 90869

Three CPT codes describe the main stages of a repetitive TMS treatment course:

These codes represent different clinical services.

The billing team should select the code supported by what actually occurred and what the clinical record documents. Staff should not simply copy the code from an earlier session.

A practical sequence may look like this:

• Initial mapping and treatment: 90867
• Routine subsequent treatment: 90868
• Subsequent treatment involving a documented motor-threshold re-determination: 90869

Applicable Medicare billing articles generally expect CPT 90867 once per treatment episode and provide specific instructions about reporting 90867, 90868, and 90869.

Practices should confirm the billing guidance that applies to their Medicare jurisdiction and review each commercial payer’s requirements separately.

A change in treatment parameters alone should not automatically cause the billing team to report 90869. The clinical record must support the service billed.

Confirm Exactly What the Payer Approved

Where prior authorization is required, an approval number is only one part of the information the practice needs.

Before treatment begins, record:

• Approved diagnosis
• Approved services
• CPT codes, when specified
• Number of approved treatments or units
• Effective dates
• Rendering provider
• Service location
• Conditions for additional review

Then confirm that the planned treatment course fits those terms.

Coverage criteria are not uniform.

Medicare coverage requirements can vary by contractor, while commercial plans may apply their own medical-necessity and authorization rules.

Therefore, practices should review the policy that applies to the individual patient and date of service rather than rely on one universal TMS checklist.

Medicare also requires careful wording. A local coverage determination establishes coverage criteria; it should not be treated as though every Medicare beneficiary receives a course-specific prior authorization.

The practice still needs to verify coverage and maintain documentation that supports every billed service.

Build Documentation That Supports TMS Billing

A statement that a patient “failed medications” may not provide enough detail to support treatment resistance under a payer’s policy.

The clinical record should allow reviewers to identify information such as:

• Medications previously tried
• Dose information
• Length of each medication trial
• Patient response
• Documented intolerance
• Psychotherapy history, when relevant
• Symptom severity
• Standardized rating scores, when required
• Psychiatrist assessment

The authorization request and the medical record should tell the same clinical story.

If the treatment history in the request conflicts with the psychiatrist’s notes or subsequent documentation, the practice may face questions during authorization or claim review.

Organize this information before submitting the request.

Trying to reconstruct months of treatment history at the last minute increases the risk of incomplete or inconsistent documentation.

Track the TMS Treatment Course as It Happens

When a payer requires authorization, treat it as an active treatment course with a remaining balance and an expiration date.

Maintain a shared tracker that includes:

• Authorization number
• Effective dates
• Approved CPT codes
• Approved units or treatments
• Rendering provider
• Approved location
• Completed treatments
• Remaining units
• Motor-threshold re-determinations
• Date when an extension or additional review should begin

Update the tracker from completed treatments, not scheduled appointments.

Cancellations, rescheduled sessions, and treatment-plan changes can otherwise cause the clinical and billing teams to maintain different counts.

Near the end of the approved course, the psychiatrist may determine that additional treatment is clinically appropriate.

At that point, the team should check whether the additional services fall within the existing approval or require another payer decision before assuming the claims will pay.

Why TMS Billing Claims Can Deny Mid-Course

An approved treatment course does not guarantee payment for every later claim.

The payer may still compare each submitted service with coverage requirements, authorization details when applicable, and supporting documentation.

Common issues include:

• Approved units have been exhausted
• The authorization period has expired
• The billed CPT code does not match the documented service
• The billed CPT code does not match the approved service
• Rendering provider information changed
• Service location changed
• Insurance information changed during treatment
• A motor-threshold re-determination lacks supporting documentation
• Requested clinical records are incomplete
• Additional or repeat treatment falls outside the current approval

The denial may first appear on the remittance advice, but the underlying mismatch may have started much earlier.

Reconciling completed treatments with the authorization and claim data gives the practice a chance to identify the discrepancy before another claim is submitted.

Handle Same-Day Psychiatric Visits Carefully

A patient receiving TMS may also need psychiatric evaluation or medication management.

That does not mean every interaction with the psychiatrist supports a separate evaluation and management claim.

If the psychiatrist performs a significant, separately identifiable, medically necessary E/M service on the same day, the documentation should support the additional assessment and work.

The billing team should then review the payer’s rules and determine whether modifier 25 is appropriate.

A useful question is:

Would the documentation clearly support a separate psychiatric visit apart from the work involved in the TMS treatment?

Do not add an E/M charge simply because the psychiatrist briefly checked on the patient during treatment.

Investigate a TMS Billing Denial Before Responding

A denied TMS claim does not automatically require an appeal.

First, review:

• Payer adjustment codes
• Remark codes
• Authorization information, if applicable
• Submitted CPT code
• Rendering provider
• Service location
• Dates of service
• Remaining approved units
• Clinical documentation

Then choose the response that fits the actual problem.

Incorrect claim information

Determine whether the practice should submit a corrected claim.

Authorization information is missing or mismatched

Contact the payer and ask whether correction or reprocessing is appropriate.

Units or dates fall outside an approval

Review the payer’s rules for an extension, additional request, or other permitted review.

Medical-necessity denial

Identify the exact criterion the payer says was not met and submit the relevant clinical information.

A generic appeal letter may not resolve a provider mismatch, coding problem, exhausted authorization, or service-location error.

Address the reason the payer actually gave.

Keep TMS Billing, Authorization, and Clinical Teams Aligned

TMS billing works best when the psychiatrist, treatment staff, authorization team, and billing team share one view of the treatment course.

Before treatment starts:

• Verify coverage
• Check authorization requirements
• Confirm payer criteria
• Record approval details when authorization is required

During treatment:

• Reconcile completed sessions
• Verify CPT coding
• Monitor remaining units
• Track authorization expiration dates
• Document motor-threshold re-determinations

Before the treatment course changes:

• Check whether additional payer review is required
• Confirm whether the current authorization still applies
• Update the tracker

When a claim denies:

• Identify the exact mismatch
• Assign the next action
• Track the response through resolution

The goal is to identify discrepancies internally before they interrupt payment halfway through a patient’s course of care.

Use a TMS Billing Work Queue With Clear Next Actions

Give each unresolved account an owner, follow-up date, and reason for review. Keep administrative corrections separate from clinical or coding questions. For related workflows, see our behavioral health denial guide and prior authorization specialist guide. For Medicare, consult the applicable contractor policy; this CMS TMS billing article is a local-policy example, not a nationwide coverage rule.

How Capitol Medical Technologies Supports TMS Billing

Capitol Medical Technologies supports psychiatry and behavioral health practices with:

• TMS billing support
• Eligibility and benefits verification
• Prior authorization tracking
• Claim follow-up
• Denial management
• Accounts receivable follow-up
• Payment posting

For practices offering TMS, our team can help keep treatment information and revenue-cycle workflows aligned from the initial mapping session through the final claim.

For broader support, review our Medical Billing Services page and Prior Authorization Services page.

Need help with TMS billing, prior authorization, or denied claims?

Contact Capitol Medical Technologies to discuss your practice’s workflow.

Capitol Medical Technologies
Phone: 571-410-3703
Email: ashfaq@capitolmedicaltech.com
Website: capitolmedicaltech.com