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LCD L34823: Tumor Treatment Field Therapy (TTFT)

LCD L34823, Tumor Treatment Field Therapy (TTFT), is the Local Coverage Determination that Noridian Healthcare Solutions, LLC and CGS Administrators, LLC apply to claims from 56 states (AK, AL, AR, AS, AZ, CA, CNMI, CO and others), effective 2020-01-01 and first in force 2015-10-01. The policy text runs 1,065 words. No other contractor publishes a policy with this title.

QuickIntell editorial content · Legacy registry date · Review not verified

Data effective
Data currency: Medicare Coverage Database LCD export release of September 24, 2026 (effective September 20, 2026). Next CMS release: weekly (Thursdays) for the MCD.
Contractor
Noridian Healthcare Solutions, LLC; CGS Administrators, LLC
States and territories
56
AK AL AR AS AZ CA CNMI CO CT DC DE FL GA GU HI IA ID IL IN KS KY LA MA MD ME MI MN MO MS MT NC ND NE NH NJ NM NV NY OH OK OR PA PR RI SC SD TN TX UT VA VI VT WA WI WV WY
Revision effective
2020-01-01
Original effective
2015-10-01
Policy text
1,065 words
Covered ICD-10 codes (articles)
0

Where this LCD applies

Each contract number is a jurisdiction on the remittance; the policy binds claims processed under these contracts and no others.

Contracts that apply LCD L34823
ContractContractorTypeStates
19003Noridian Healthcare Solutions, LLCDME MACAK AS AZ CA CNMI GU HI IA ID KS MO MT ND NE NV OR SD UT WA WY
18003CGS Administrators, LLCDME MACAL AR CO FL GA LA MS NC NM OK PR SC TN TX VA VI WV
17013CGS Administrators, LLCDME MACIL IN KY MI MN OH WI
16013Noridian Healthcare Solutions, LLCDME MACCT DC DE MA MD ME NH NJ NY PA RI VT

Procedure codes named in the LCD

A4555 (Electrode/Transducer For Use With Electrical Stimulation Device Used For Cancer Treatment, Replacement Only), E0766 (Electrical Stimulation Device Used For Cancer Treatment, Includes All Accessories, Any Type).

Coverage indications, limitations and medical necessity

For any item to be covered by Medicare, it must 1) be eligible for a defined Medicare benefit category, 2) be reasonable and necessary for the diagnosis or treatment of illness or injury or to improve the functioning of a malformed body member, and 3) meet all other applicable Medicare statutory and regulatory requirements.

The purpose of a Local Coverage Determination (LCD) is to provide information regarding “reasonable and necessary” criteria based on Social Security Act § 1862(a)(1)(A) provisions.

In addition to the “reasonable and necessary” criteria contained in this LCD there are other payment rules, which are discussed in the following documents, that must also be met prior to Medicare reimbursement:

The LCD-related Standard Documentation Requirements Article, located at the bottom of this policy under the Related Local Coverage Documents section.

The LCD-related Policy Article, located at the bottom of this policy under the Related Local Coverage Documents section.

Refer to the Supplier Manual for additional information on documentation requirements.

Refer to the DME MAC web sites for additional bulletin articles and other publications related to this LCD.

For the items addressed in this LCD, the “reasonable and necessary” criteria, based on Social Security Act § 1862(a)(1)(A) provisions, are defined by the following coverage indications, limitations and/or medical necessity.

INITIAL COVERAGE FOR NEWLY DIAGNOSED GLIOBLASTOMA MULTIFORME:

Tumor treatment field therapy (E0766) is covered for the treatment of newly diagnosed Glioblastoma Multiforme (GBM) only when all of the following criteria are met:

The beneficiary has histologically confirmed (World Health Organization (WHO) grade IV astrocytoma), newly diagnosed, supratentorial GBM; and,

The beneficiary has received initial treatment with maximal debulking surgery (when feasible), followed by chemotherapy and radiotherapy; and,

Tumor treatment field therapy is initiated within 7 weeks from the last dose of concomitant chemotherapy or radiotherapy, whichever is later; and,

The beneficiary has no evidence of progression by Response Assessment in Neuro-Oncology (RANO) criteria; and,

The beneficiary has a Karnofsky Performance Score (KPS) of at least 70; and,

The beneficiary will use TTFT for an average of 18 hours per day.

If all of the coverage criteria above are not met, claims for code E0766 will be denied as not reasonable and necessary.

CONTINUED COVERAGE FOR NEWLY DIAGNOSED GBM BEYOND THE FIRST THREE MONTHS OF THERAPY:

Continued coverage of TTFT (E0766) beyond the first three months of therapy requires that no sooner than the 60th day but no later than the 91st day after initiating therapy, the treating practitioner must conduct a clinical re-evaluation and document that the beneficiary is continuing to use and is benefiting from TTFT.

Documentation of clinical benefit is demonstrated by:

In-person clinical re-evaluation by the treating practitioner; and,

Objective evidence of adherence to therapy, reviewed by the treating practitioner.

Adherence to therapy is defined as the use of TTFT for an average of 18 hours per day (excluding days the treating practitioner has documented a medical need to limit or interrupt treatment).

If the above criteria are not met, continued coverage of TTFT will be denied as not reasonable and necessary.

If the practitioner re-evaluation does not occur until after the 91st day but the evaluation demonstrates that the beneficiary is benefiting from TTFT as defined in criteria 1 and 2 above, continued coverage of TTFT will commence with the date of that re-evaluation. See Policy Specific Documentation Requirements in the LCD-related Policy Article, located in the Related Local Coverage Documents section of this LCD, for information about KX modifier use.

RECURRENT GBM

Tumor treatment field therapy (E0766) will be denied as not reasonable and necessary for the treatment of recurrent GBM.

OTHER USES

The use of TTFT for any indications other than newly diagnosed GBM will be denied as not reasonable and necessary.

BENEFICIARIES ENTERING MEDICARE

For beneficiaries who are undergoing treatment with TTFT for newly diagnosed, supratentorial GBM prior to enrollment in Fee-For-Service (FFS) Medicare and are seeking Medicare coverage of TTFT, coverage will be provided if all of the following coverage requirements are met:

The beneficiary has been receiving TTFT following initial maximal debulking surgery (if feasible) followed by chemotherapy/radiotherapy for histologically confirmed newly diagnosed GBM; and,

Clinical Evaluation – Following enrollment in FFS Medicare, the beneficiary must have an in-person evaluation by their treating practitioner who documents in the beneficiary’s medical record that:

The beneficiary is adherent with the use of TTFT for an average of 18 hours per day; and,

The beneficiary is deriving benefit from the therapy.

If all of the above are not met, the claim will be denied as not reasonable and necessary.

GENERAL

A Standard Written Order (SWO) must be communicated to the supplier before a claim is submitted. If the supplier bills for an item addressed in this policy without first receiving a completed SWO, the claim shall be denied as not reasonable and necessary.

For Durable Medical Equipment, Prosthetics, Orthotics and Supplies (DMEPOS) base items that require a Written Order Prior to Delivery (WOPD), the supplier must have received a signed SWO before the DMEPOS item is delivered to a beneficiary. If a supplier delivers a DMEPOS item without first receiving a WOPD, the claim shall be denied as not reasonable and necessary. Refer to the LCD-related Policy Article, located at the bottom of this policy under the Related Local Coverage Documents section.

For DMEPOS base items that require a WOPD, and also require separately billed associated options, accessories, and/or supplies, the supplier must have received a WOPD which lists the base item and which may list all the associated options, accessories, and/or supplies that are separately billed prior to the delivery of the items. In this scenario, if the supplier separately bills for associated options, accessories, and/or supplies without first receiving a completed and signed WOPD of the base item prior to delivery, the claim(s) shall be denied as not reasonable and necessary.

An item/service is correctly coded when it meets all the coding guidelines listed in CMS HCPCS guidelines, LCDs, LCD-related Policy Articles, or DME MAC articles. Claims that do not meet coding guidelines shall be denied as not reasonable and necessary/incorrectly coded.

Proof of delivery (POD) is a Supplier Standard and DMEPOS suppliers are required to maintain POD documentation in their files. Proof of delivery documentation must be made available to the Medicare contractor upon request. All services that do not have appropriate proof of delivery from the supplier shall be denied as not reasonable and necessary.

Summary of evidence (opening)

Support for TTFT in the treatment of newly diagnosed GBM stems from a study by Stupp et al. (2017), also referred to as the EF-14 study. The EF-14 study was a randomized, open-label trial of 695 patients with histologically-confirmed glioblastoma multiforme (World Health Organization (WHO) grade IV astrocytoma) whose tumor was resected or biopsied and had completed concomitant radiochemotherapy and TTFT. Of the 695 randomized patients, 637 (92%) completed the trial. Median progression-free survival from randomization was 6.7 months in the TTFT-temozolomide group vs 4.0 months in the temozolomide-alone group (HR, 0.63; 95% CI, 0.52-0.76; P The National Comprehensive Cancer Network assigns TTFT a Category 1 recommendation as a treatment option for newly diagnosed GBM, following initial maximal debulking surgery (when feasible), chemotherapy, and radiation therapy.

the full summary and analysis of evidence are in the CMS record.

Dates, lineage and related policies

Original determination effective
2015-10-01
Current revision effective
2020-01-01
Last reviewed by the contractor
2019-07-18
MCD version
27

Other related documents: A52711 (Article), A55426 (Article), A56688 (Response to Comments).

Using this policy on a claim

Match the documented indication to the covered indications above before the service is scheduled, carry a diagnosis from the article's covered list on the claim line, and keep the elements the documentation section asks for in the record, because the contractor can request it later through medical review. A denial under this policy arrives as CARC 50 with remark N115; the LCD lookup guide walks through the appeal path and the Advance Beneficiary Notice rules, and the Noridian Healthcare Solutions, LLC hub and CGS Administrators, LLC hub list every other active policy from the same contractor.

Frequently asked questions

What does LCD L34823 cover?

Tumor treatment field therapy (E0766) is covered for the treatment of newly diagnosed Glioblastoma Multiforme (GBM) only when all of the following criteria are met: The full indications and limitations are reproduced on this page from the CMS Medicare Coverage Database export of September 24, 2026.

Which states does LCD L34823 apply to?

Noridian Healthcare Solutions, LLC and CGS Administrators, LLC apply it to Medicare claims in AK, AL, AR, AS, AZ, CA, CNMI, CO, CT, DC, DE, FL, GA, GU, HI, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, PR, RI, SC, SD, TN, TX, UT, VA, VI, VT, WA, WI, WV, WY. A Local Coverage Determination binds only the contractor that wrote it; the same service in another jurisdiction is judged under that contractor's own policy or, where none exists, claim by claim.

Which diagnosis codes support medical necessity under LCD L34823?

The current export links no billing and coding article with a diagnosis list to this LCD, so coverage is decided on the indications in the policy text and the documentation in the record rather than by an automated diagnosis edit.

How do I appeal a denial under LCD L34823?

The remittance carries claim adjustment reason code 50 with remark code N115, naming the LCD. Compare the documented indication with the policy's covered indications and the article's diagnosis list, then file a redetermination within 120 days with the record attached; if the service genuinely falls outside the policy, the patient can be billed only when a valid Advance Beneficiary Notice was obtained before the service.

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-02. Verify against the primary file before billing or contracting decisions.

Disclaimer

The policy text and code lists are reproduced from the CMS Medicare Coverage Database export as an operational reference. Verify against the current LCD and article on cms.gov before billing; coverage depends on the full record and the contractor. Not legal, clinical or billing advice.