In the US, for IRS purposes of "you must give health insurance or pay a penalty", full-time is 30 hours a week or more. (Specifically companies with >50 employees, IIRC). So as long as you're working 30 hours a week you should be getting health insurance same as the full-time employees.

See https://www.irs.gov/affordable-care-act/employers/identifyin...

(Some health insurance plans in fact _require_ people to be >=30 hours a week to be included on it.)