Registered nurses (RNs)
No; RNs cannot inject neurotoxins or fillers in Massachusetts
Nurse practitioners & physician assistants
Cannot inject neurotoxins/fillers; limited to supportive clinical roles
Supervision & the medical director
Required; physician must be on-site or have direct oversight
The exam requirement
Required; in-person exam mandatory before any treatment
What to verify in Massachusetts
Ensure a licensed Massachusetts physician owns or has controlling interest in the medspa; non-physician ownership is not permitted for injection-based practices.
Primary source: Massachusetts Medical Board
General business information for Massachusetts medical-spa owners, current as of 2026 — not legal advice. State boards update rules often; confirm specifics with the Massachusetts board (and your own counsel) before you act.