TMS denied as non-formulary by Humana?

Humana's specific coverage criteria for tms are defined in its own published medical/coverage policy and the FDA-approved prescribing label. A successful appeal documents that your medical records satisfy each criterion those sources list — confirmed diagnosis, any required prior treatments (with dates and outcomes), and clinical severity. If the exact criteria weren't included with your denial, request them in writing; your appeal then maps each requirement to the matching fact in your chart.

## Why Humana Issues a Non-Formulary Denial for TMS

Because TMS is a procedure rather than a pharmacy drug, a "non-formulary" denial from Humana in this context typically means TMS has been categorized outside the covered benefits under your specific Humana plan, or that it is not listed as a covered procedure in your plan's benefits structure. This can result from a plan design that excludes TMS as a covered service, a benefit-category mismatch in how the claim or authorization was coded, or a plan that requires TMS to be covered under a specific benefit tier that was not used. Coverage for TMS varies significantly across Humana plan types, so the first step is to confirm exactly what your plan covers.

## Your Appeal Rights

Under ACA §2719 and ERISA §503, you have the right to a full internal appeal and, if that is denied, an independent external review. The external reviewer is an accredited organization with no financial relationship with Humana, and its decision is binding. You typically have approximately 180 days from receipt of the denial to file an internal appeal. Expedited review is available when standard timelines would seriously jeopardize your health.

A key legal argument in non-formulary or non-covered denials for mental health procedures is the Mental Health Parity and Addiction Equity Act (MHPAEA). Federal parity law prohibits Humana from applying coverage limitations to mental health or substance use disorder treatments that are more restrictive than those applied to analogous medical or surgical benefits. If Humana covers comparable neuromodulation or procedural treatments for physical health conditions, it may be required to cover TMS under parity.

## What to Gather

• Your Summary Plan Description (SPD) or Evidence of Coverage: Review the mental health benefits section for any language about neuromodulation, brain stimulation, or non-pharmacological psychiatric treatments.
• The denial letter: Identify the specific benefit category or exclusion language Humana is relying on.
• Correct procedure coding: Confirm with your provider that TMS was billed under the correct CPT code(s) and that no coding error contributed to the denial.
• MHPAEA parity request: Send a written request to Humana asking for the criteria and coverage rules applied to comparable medical/surgical procedures, and ask Humana to explain how its TMS coverage rules comply with MHPAEA.
• Prescriber support letter: A letter from your treating clinician establishing medical necessity and referencing parity obligations.

## Criteria-Mapping Structure

| Non-Formulary Basis | Your Response | |---|---| | Benefit exclusion or category cited | [Quote from denial letter] | | Plan document language on mental health benefits | [Quote from SPD or Evidence of Coverage] | | MHPAEA parity argument | [Comparable physical-health procedure Humana covers] | | Correct procedure code confirmation | [Provider confirmation of CPT code] |

Non-formulary denials that rest on benefit-category placement — rather than a clear, explicit exclusion — are frequently resolved through a combination of parity arguments and corrected documentation.