Am Sole Proprietor / non-w2 Dentist and signed a covenant to noncompete within a said distance. Is this contract enforceable since I am not w2?

Your tax classification has no bearing on whether or not a contract is legally enforceable.   In most states, non-compete clauses are valid for a specific time period and specific distance.  You should contact a local employment law attorney to determine if the non-compete clause is valid. This is not intended to be legal advice, and is general in its nature. No attorney-client relationship exists or is formed by this information. Furthermore, this does not represent the views or opinions of LexisNexis or its affiliated companies.