Can a non-physician own a med spa in Hawaii?

Short answer
The cited rules do not settle this — they make medical care a "professional service" that only "qualified persons" may hold shares in a professional corporation for, but never define who qualifies or address non-physician ownership of other entity types.

Hawaii’s line on who may own a medical practice is drawn by the professional corporation act and the licensing statutes’ unlicensed-practice grounds. The Act defines a professional service as one that may lawfully be rendered only by persons licensed under the named chapters, medicine, nursing, and pharmacy among them, restricts share ownership to qualified persons, organizes professional corporations for a single profession, allows services to be rendered only through licensed individuals, requires not less than one-half of the directors and all officers other than the secretary and treasurer to be qualified persons, and confines the corporation to the profession in its articles. The medical practice act makes employing any person to solicit patients, and knowingly permitting an unlicensed person to perform activities requiring a license, grounds for discipline; the uniform licensing statute reaches aiding an unlicensed person and employing any unlicensed person where licensure is required, and fines a licensee who acts as the agent, partner, or associate of an unlicensed person with intent to evade the licensing laws. None of the sections cited here addresses the division of fees or a percentage arrangement with a non-clinical owner.