Can a non-physician own a med spa in District of Columbia?

Short answer
Not if it's organized as a professional corporation — only individuals licensed in the service rendered may be shareholders (a solo owner's secretary need not be licensed), and unlicensed staff may be employed but not perform it. Other forms aren't addressed.

The district requires every shareholder, director and officer to be licensed — and then expressly declines to require them to work there. a professional corporation may be organized solely to render professional services through its shareholders, directors, officers, employees or agents who are themselves licensed, and a person may not be a shareholder, director or officer, or render professional services on its behalf, unless they are an individual licensed to render a professional service for which the corporation is organized — with one narrow exception, that a single-shareholder corporation’s secretary need not be licensed, and must not perform professional services if they are not. The definition says the same from the other direction: shareholders may be only individuals duly licensed to render THE SAME professional service as the corporation. But §29-508(c) is the provision to read before structuring anything: nothing in the chapter requires a shareholder or incorporator to have a present or future EMPLOYMENT relationship with the corporation, or actively to participate in any capacity in the production of its income or the performance of its professional services. Licensure is required; labor is not. The Health Occupations Revision Act then reaches the arrangement from the disciplinary side: paying or agreeing to pay anything of value to, or splitting or dividing fees for professional services with, any person for bringing or referring a patient is a ground for disciplinary action.