CPT code 90868 describes a specific part of the Repetitive Transcranial Magnetic Stimulation (rTMS) treatment plan.
The official description of the CPT 90868 is: Therapeutic repetitive transcranial magnetic stimulation (TMS) treatment; subsequent delivery and management, per session.
In simple terms, once a patient has gone through the initial setup and testing, code 90868 is used to bill for each follow-up treatment session.
Services Included in CPT 90868
CPT 90868 includes the clinical execution and management of therapeutic TMS following the initial session. Importantly, this code covers the technical component of the service, which is often performed by a trained technician under supervision.
Specifically, CPT 90868 covers:
- Application of repetitive magnetic pulses to targeted brain regions according to the established protocol.
- Managing the treatment parameters, such as ensuring proper coil positioning and confirming the stimulus intensity based on the motor threshold determined in 90867.
- Monitoring the patient during the session for tolerance and immediate side effects (e.g., headaches, jaw discomfort).
- Basic documentation of patient status and procedure notes during the session.
These services reflect an ongoing clinical relationship and the technical execution necessary for a full course of repetitive TMS. CPT 90868 is billed per session, not based on time.
Who Can Bill 90868 CPT Code?
Billing for CPT 90868 depends heavily on the supervision requirements set by the payer and the state scope of practice laws.
- Physicians: Psychiatrists and Neurologists (MD/DO).
- Non-Physician Practitioners (NPPs): Psychiatric nurse practitioners and physician assistants (NPs/PAs).
- Technicians: The technical service is often delivered by a trained technician, but the supervising provider (Physician or NPP) bills the service under their supervision.
Supervision Alert: For many major payers, including Medicare, Direct Supervision is often required for 90868 in a non-facility setting. This means the supervising physician/NPP must be physically present in the office suite and immediately available to intervene.
How CPT 90868 Fits into the TMS Treatment Course
Understanding the TMS code family prevents coding errors that result in denials. The codes are mutually exclusive.
| CPT Code | Description | Key Action | Frequency |
| 90867 | Initial TMS Treatment | Cortical Mapping + Threshold Testing + First Treatment | Once per course of treatment |
| 90868 | Subsequent TMS Treatment | Delivery and Management Only | Once per day for subsequent sessions |
| 90869 | Subsequent Motor Threshold Redetermination | Threshold Re-testing + Treatment | Billed only if re-mapping is necessary |
Critical Coding Restriction: You cannot bill 90868 and 90869 on the same date for the same patient. If the threshold is re-determined, only 90869 is billed for that session.
Documentation Requirements for CPT 90868
To support clean claims and audits, your documentation must cover:
- Date and duration of the TMS session.
- Clinical management details during treatment, including coil placement and stimulation parameters.
- Patient clinical status and any response or side effects.
- Updates to treatment plan or protocols.
- Symptom assessments, e.g., PHQ-9, before and after sessions.
- Signature or attestation by the provider delivering care.
Clear, detailed notes justify the medical necessity of continued rTMS therapy and distinguish between sessions.
Common Coding and Billing Mistakes with CPT 90868
- Billing CPT code 90867 repeatedly instead of switching to 90868 after the initial session.
- Not obtaining or renewing prior authorization, causing denials.
- Improper documentation of session details or patient progress.
- Billing more than one session per day when payer guidelines restrict this.
- Using incorrect modifiers or missing telehealth modifiers if applicable.
Avoid these to reduce claim rejections and lost revenue.
Reimbursement Rates For CPT Code 90868
Reimbursement for CPT 90868 is lower than 90867 because it reflects the technician’s time and the use of the equipment, not the high-level physician work of mapping. Rates are highly variable by geography (RVU adjustments) and contract type.
| Payer Type | Typical Reimbursement Range (Non-Facility) | Note |
| Medicare | $180 – $260 | Varies significantly by geographic area. Check the annual Medicare Fee Schedule. |
| Medicaid | $150 – $220 | Generally lower than commercial rates; varies widely by state. |
| Commercial | $180 – $350 | Depends entirely on your negotiated contract with the specific payer. |
Quick Tips for Billing CPT 90868
Here are the simplest, most essential rules for billing your daily TMS treatments correctly and getting paid faster:
- Get Pre-Approval First: You must have insurance authorization before the first treatment.
- Bill Only Once a Day: You can only charge for one 90868 session per patient, per day.
- Set Renewal Alarms: Start the re-approval process early (around session #25 or #30). If authorization runs out, you don’t get paid.
- Avoid Double Bill: Do not bill 90868 on the same day as CPT 90869 (re-mapping).
- Use Modifier 25 Carefully: Only add Modifier 25 to an E/M code (e.g., 99214) if the doctor is treating a completely separate, significant illness that day.
Conclusion
CPT code 90868 is the most frequently billed code in the TMS series and plays a key role in maintaining consistent practice revenue. Ensuring accuracy in documenting daily treatment parameters, strictly adhering to authorized frequency limits, and following payer-specific supervision rules are essential for successful 90868 billing.
For practices looking to simplify this process, FC Billing provides a reliable TMS billing solution, helping maximize claim payments, minimize denials, and streamline the revenue cycle.
