A couple of cautionary points to remember.
Because electrodiagnostics are relatively uncommon in eye care generally and optometry in particular, its use increases your audit risk from third party payers. So do not take shortcuts in your documentation. Scribbles and cryptic notes don’t cut it. Be sure you have appropriate history, clinical signs, and/or symptoms that are also clearly indicated in your written order for the test (that is, they are in your record AND then in your order you refer to them), and be sure you prepare a good interpretation and report that describes how the findings are relevant to or impacting your management of the patient. Avoid references to “rule out” or “ruling out” in your reasons for the tests.
Remember that you are being paid for BOTh doing the test AND interpreting it. Document both as if you KNOW your record will be audited by someone looking for an excuse to deny payment.
It is helpful to create and have a small library (Manila folder) where you keep peer reviewed studies that support the use of the tests for various conditions so you are armed to respond to an insurance denial. A report or story in an optometric or OMD journal is nice, but not always accepted as adequate for establishing medical necessity. Published studies are better, but you can never quite seem to find them when you need them. So have a library at hand.
Know your LCDs. There is no better response to a denial for medical necessity than an LCD, and there is no harder appeal to win than when an LCD says it is not covered.
Also, I recommend obtaining an ABM in case a payer denies payment and you cannot get that denial reversed.