Corporate Practice of Medicine and the MSO Structure: What Med Spa Owners Need to Know
If you are researching how to legally structure a med spa, you have probably run into two terms that seem to follow each other everywhere: corporate practice of medicine and MSO. The corporate practice of medicine doctrine is a legal principle that restricts who can own a medical practice and, by extension, who can control clinical decision making. An MSO, or management services organization, is the business entity that many medical spa owners use to operate legally alongside a licensed medical practice without violating that doctrine. If you own or plan to open a med spa, understanding how these two pieces fit together is not optional. It determines how your business can be structured, who has to sign what, and where your liability actually sits.
This article covers what the corporate practice of medicine doctrine means, why it exists, which states enforce it, how the MSO structure works in practice, and the mistakes that get med spa owners into trouble. This is general information, not legal advice. Corporate practice of medicine rules vary significantly by state, and you should confirm the specifics that apply to your business with your own attorney or your state medical board before making structural decisions.
What corporate practice of medicine actually means, in plain terms
The corporate practice of medicine doctrine says that a business corporation, meaning an entity not owned and controlled by licensed physicians, cannot practice medicine or employ physicians to provide medical care to the public. In practical terms, this means a non-physician cannot legally own a medical practice, direct clinical treatment decisions, or take a cut of revenue tied directly to a physician’s professional services in states where the doctrine is enforced.
For a med spa, this matters because many of the procedures offered, from neurotoxin injections to certain laser and energy-based treatments, are considered the practice of medicine. That classification means the entity performing those services generally has to be owned by a licensed provider, not by an outside investor, a spa operator without a medical license, or a management company. The doctrine does not ban med spas from operating. It restricts how ownership and clinical control have to be divided.
Why the doctrine exists, and what it is trying to prevent
Corporate practice of medicine rules were built around a specific concern: that a non-physician owner, focused on profit rather than patient care, could pressure a physician to make clinical decisions that benefit the business instead of the patient. The goal is to keep medical judgment insulated from commercial pressure, so a physician is never pushed to upsell treatments, cut corners on care, or prioritize volume over appropriateness by someone without a medical license signing their paycheck.
This is also why the doctrine focuses on clinical control rather than business operations broadly. Marketing, scheduling, billing, facilities, and administrative staffing are not considered the practice of medicine in most states. The doctrine protects the decision of whether and how to treat a patient, not the decision of how to run a front desk.
Which states enforce it, and which do not
Corporate practice of medicine is not a federal law. It exists as a patchwork of state statutes, medical board regulations, and case law, and enforcement varies widely. If you are comparing states for expansion or trying to understand why one market feels more restrictive than another, this is the piece that matters most.
States most frequently cited as enforcing a strict corporate practice of medicine doctrine include California, Colorado, Illinois, Iowa, New Jersey, New York and Texas. In these states, a non-physician generally cannot own a medical practice outright, and structures that attempt to route around that restriction face real scrutiny.
States most often cited as not enforcing a formal corporate practice of medicine doctrine, or applying it loosely, include Florida, Alabama, Georgia, Missouri, and Utah, among others. In these states, non-physician ownership of certain medical practices is generally more permissible, though other restrictions, such as fee-splitting rules or scope-of-practice limits, can still apply even without a formal doctrine on the books.
A few caveats matter here. This list reflects general characterizations found across legal commentary, not a definitive ruling for your situation. Some states without a strict doctrine still have related restrictions that function similarly, so the absence of corporate practice of medicine in name does not mean the absence of ownership rules in practice. And rules change. Confirm current status with your attorney or your state medical board before relying on any state’s classification, including the ones listed here.
What an MSO is and how the structure works
A management services organization, or MSO, is a business entity that provides non-clinical support to a medical practice under a contract called a management services agreement. The MSO does not own the practice, does not employ the providers in their clinical capacity, and does not make treatment decisions. It exists to handle the business side of running a clinic.
Under this structure, two separate entities work side by side. The professional entity, typically owned by a licensed physician or another permitted licensee, holds the medical practice itself. It employs or contracts the clinical staff and is legally responsible for patient care. The MSO, which can be owned by non-physicians, holds the business side: things like marketing, billing, human resources, facilities, equipment leasing, and administrative technology. The management services agreement is the contract that connects the two, spelling out what services the MSO provides and what fee structure applies in exchange.
This split exists specifically to satisfy the corporate practice of medicine doctrine in states that enforce it. The professional entity stays in the hands of licensed clinicians, which keeps clinical control where the law requires it, while the MSO allows non-physician owners and operators to build and scale the business side.
What an MSO can and cannot control
This is where a lot of guidance gets vague, and vagueness here is exactly what causes problems. An MSO can generally handle marketing, scheduling and intake logistics, billing and collections, hiring and management of non-clinical staff, leasing or purchasing equipment and facilities, and administrative technology. These are business functions, and structuring them through the MSO is the entire point of the arrangement.
An MSO generally cannot make or influence clinical decisions. It cannot direct which treatments a provider offers a specific patient, cannot override provider judgment on clinical protocols, and cannot structure fees as a straight percentage of clinical revenue in states where fee-splitting is restricted, since that can look like the MSO is sharing in the practice of medicine rather than being paid for services rendered. It also generally cannot employ the licensed providers for their clinical work, since that employment needs to sit with the professional entity.
The management services agreement itself is where this distinction either holds up or falls apart. An agreement that is vague about where business support ends and clinical authority begins is not a formality you can skip past. It is the document regulators and courts look at first when a structure gets challenged, and a poorly drafted one can undermine the separation the whole structure depends on.
Where this leaves a med spa owner in practice
If you are not a licensed provider yourself, this structure means you cannot simply own the medical practice performing injectable or energy-based treatments in states with a strict doctrine. You can own and operate the MSO, and through it, control the business growth, marketing, and operations of the med spa, but the clinical side has to sit with a licensed provider, whether that provider is employed by the professional entity, contracted with it, or the practice connects to licensed providers through an on-demand telehealth platform for oversight and specific services.
That last point matters more than it might seem. Not every med spa needs, or can justify, a full-time physician on staff to satisfy this requirement. Many structures rely on a medical director relationship or on-demand provider access to fulfill oversight requirements without the overhead of a full-time clinical hire. If you are still working out what that oversight role actually needs to look like day to day, what a medical director does in a med spa lays out the responsibilities and how they connect back to the professional entity in this structure. And because these rules are not static, especially in states that actively legislate around MSOs, it is worth tracking changes as they happen. New California laws affecting MSOs in 2026 is a useful read if you operate in, or are expanding into, one of the states where enforcement is tightening rather than loosening. Branding is one of the business functions that sits on the MSO side of that line, which is why the patient-facing side of any outsourced clinical service is worth checking too: white label telehealth keeps your clinic’s name on the patient experience while the clinical work stays with licensed providers under the professional entity.
Common mistakes
A few mistakes show up repeatedly in how med spa owners approach this structure.
The first is treating the professional entity and management services agreement as a formality rather than the core of the legal structure. Some owners set up the paperwork once and never revisit it as the business grows, changes locations, or adds services, even though each of those changes can affect whether the original agreement still holds up.
The second is using a generic or templated management services agreement without having it reviewed for the specific state the practice operates in. A template built for one state’s rules can create real exposure in another, particularly around fee structures and the scope of what the MSO is permitted to control.
The third is assuming a structure that works in one state will travel cleanly to another. Enforcement, fee-splitting restrictions, and MSO rules are all state-specific, and expanding without re-checking them is one of the more common and avoidable compliance gaps for growing med spa businesses.
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