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December 2016 Texas Medicaid Provider Procedures Manual

Medical and Nursing Specialists, Physicians, and Physician Assistants Handbook : 9 Physician : 9.2 Services, Benefits, Limitations, and Prior Authorization : 9.2.28 Evoked Response Tests and Neuromuscular Procedures : Electromyography and Nerve Conduction Studies
Electromyography (EMG) and nerve conduction studies (NCS), collectively known as electrodiagnostic (EDX) testing, must be medically indicated and may be reimbursed with the diagnosis codes listed below. Testing must be performed using EDX equipment that provides assessment of all parameters of the recorded signals. Studies performed with devices designed only for screening purposes rather than diagnoses are not a benefit of Texas Medicaid.
Any EDX testing procedures may be reimbursed up to four different dates of service per calendar year, same provider. Any E/M service will be denied as part of another service when billed for the same date of service as EMG or NCS service by the same provider.
Claims for nerve conduction studies that are denied for exceeding the maximum number of studies allowed per day, may be appealed with supporting medical record documentation.
The reason for the referral, the specific site(s) tested, and a clear diagnostic impression must be documented in the client’s medical record for each NCS or EMG study performed.
The client’s medical records must clearly document the medical necessity for the NCS and EMG testing. The medical record documentation must reflect the actual results of specific tests (such as latency and amplitude).
Medical necessity for re-evaluation of a client (beyond the initial consultation and testing) must be clearly documented in the client’s medical record. Supporting documentation includes, but is not limited to, the following:
Unexplained symptoms suggestive of peripheral nerve, muscle or neuromuscular junction pathology, manifested by muscle weakness, muscle atrophy, loss of dexterity, spasticity, sensory deficits, swallowing dysfunction, diplopia, or dysarthria
The client’s medical records are subject to retrospective review. NCS hard copies of the wave form recordings obtained during the testing will aid documentation requirements in cases where a review becomes necessary.
The following EMG procedure codes may be reimbursed for one service per day, each procedure, by the same provider:
Procedure code 95866 may be reimbursed up to two services per day, same provider. Procedure code 95870 may be reimbursed in multiple quantities if specific muscles are documented.
The needle EMG examination must be performed by a physician specially trained in electrodiagnostic medicine, as these tests are simultaneously performed and interpreted.
Surface or macro-EMG testing is considered experimental and is not a benefit of the Texas Medicaid.
NCS are reimbursed by Texas Medicaid with documentation of medical necessity using the following procedure codes:
NCS must be performed by one of the following:
A trained individual under the direct supervision of a physician. (Direct supervision means that the physician is in close physical proximity to the electrodiagnostic laboratory while testing is underway, immediately available to provide the trained individual with assistance and direction, and responsible for selecting the appropriate NCS to be performed.)
When the same studies are performed on unique sites by the same provider for the same date of service, studies for the first site must be billed without a modifier and studies for each additional site must be billed with modifier XE, XP, XS, or XU, indicating a distinct procedural service. Modifier 59 should be used when modifier XE, XP, XS, or XU is not appropriate.
Procedure codes 95907, 95908, 95909, 95910, 95911, 95912, and 95913 may be reimbursed only once when multiple sites on the same nerve are stimulated or recorded.
Prior authorization is required when the anticipated number of nerve conduction studies planned for an evaluation exceeds the following maximum number of studies:
Must be billed with one of the primary procedure codes 95907, 95908, 95909, 95910, 95911, 95912, or 95913.
Requests for prior authorization must be submitted to the Special Medical Prior Authorization department (SMPA) using the Special Medical Prior Authorization (SMPA) Request Form.
An advanced practice registered nurse (APRN) or a physician assistant (PA) may sign all documentation related to the provision of evoked response tests and neuromuscular procedures on behalf of the client’s physician when the physician delegates this authority to the APRN or PA. The APRN or PA provider’s signature and license number must appear on the forms where the physician signature and license number blocks are required.
Requests must include documentation supporting medical necessity for the number of studies requested, and they must be received on or before the requested DOS. Requests received after the services are performed will be denied for DOS that occurred before the date the request was received.
Medical record documentation must establish medical necessity for the additional studies, including one or more of the following:
If multiple diagnoses have been established by nerve conduction studies and the recommendations in the table above for a single diagnostic category do not apply, then the provider should document all diagnoses established as a result of EDX testing.
Testing of an asymptomatic contralateral limb to establish normative values for an individual client (particularly the elderly, diabetic, and clients with a history of ethyl alcohol [ETOH] usage).

Texas Medicaid & Healthcare Partnership
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