Care Association is the company that I used as a single practicioner and as an agency serving the community. You may of course, you whomever you like. They are invested in our community and charge $295 a year.
HPSO is another company that was shared with us. They charge between $110 and $197 for an indiviudal each year. They have other policies like disabiliy and long term care that may be beneficial to you. When you complete their application you do have to select the profession of Mental Retardation Worker (I know it's outdated but it's what they have our services listed under).
Notes regarding required insurance:
Liability Insurance (1 million minimum)
Privacy Insurance (50 thousand per occurrence minimum) --- (If you get liability insurance with the company above, privacy insurance is included, if you need standalone privacy insurance you can email: Kelsey.firstname.lastname@example.org - it does not have to be from this company)