Medicare rates:
CPT 95886 equals 2.75 RVUs, about $100 depending on conversion factor.
CPT 95910 equals 5.42 RVUs, about $195 depending on conversion factor.
X8/day equals $2352
Commercial insurance may be more or may be less, depending on the market.
If they are paying you cash and you take no risk for bad collections, it is probably equitable. However, the main part of your time is being spent as a nerve tech rather than as a physician.
If you are a fellow looking to moonlight or otherwise have unused time on your hands, it would be reasonable. However, if your looking to build a practice, your time would be better spent doing something else.