BaylorGenetics and GeneDX both do gene sequencing. In the US, generally what you’ll get is a WES, Whole Exome Sequencing, and there is a ton of paperwork a geneticist must go through to get it approved because it is very expensive, however the price comes down the more the science improves. One word of warning, you need a super skilled person to interpret it, if you get a run of the mill genetic counselor that reads the report only and does no additional research into causative genes it can frustrating to get any further necessary testing. The test is only as good as the person who orders and interprets it. Plus all the warnings about getting your results released to you...