If you are a physician evaluating a private equity offer, you will run into the term MSO quickly, and it is one of the most important structures to understand before you sign. It determines how much control you keep, how the money flows, and what “still owning your practice” actually means after the deal closes. Many physicians nod along to the MSO explanation during the pitch and only later realize how much it changed.
This guide explains what an MSO is, why these structures are used, and what a physician should look at closely, in plain terms rather than legal abstraction.
What is an MSO?
A Management Services Organization is a separate company that provides the administrative and business functions of a medical practice. It does not practice medicine. Instead, it handles the operational side: billing and collections, staffing of non-clinical employees, scheduling, IT, purchasing, marketing, real estate and equipment, payer contracting support, and general management.
In a private equity transaction, the PE firm typically owns the MSO. The physicians continue to own the clinical entity, the professional corporation or professional association that employs the doctors and delivers patient care. The MSO and the clinical entity then enter into a Management Services Agreement, a long-term contract under which the MSO provides all those business services in exchange for a management fee.
So after the deal, the picture usually looks like this: you still own the medical practice on paper, but a PE-owned MSO runs the business side of it under a contract that can last many years.
Why do private equity deals use an MSO structure?
The MSO model is not an accident of deal-making. It exists largely to solve a legal problem: in many states, the corporate practice of medicine doctrine prohibits corporations and non-physicians from owning medical practices or employing physicians to deliver care.
A private equity firm is a non-physician owner. In a state with a strong corporate practice of medicine prohibition, the firm generally cannot simply buy the medical practice outright. The MSO structure is the workaround the industry has developed: the PE firm owns the business-services company (which anyone can own), the physicians retain ownership of the clinical entity (as the law requires), and the MSA links the two so the economics and control flow to the MSO.
This is why you cannot evaluate an MSO structure without understanding the doctrine behind it. We cover the doctrine in depth in our forthcoming guide on the corporate practice of medicine, but the short version is that the MSO exists to let non-physician capital participate in medicine in states that would otherwise forbid direct ownership. The structure is legal and common; the question for a physician is always what the specific terms do.
Who controls what: the clinical entity vs. the MSO
The heart of the structure is the division of control. Here is the general split, though every MSA allocates it differently:
| Function | Typically the clinical entity (physicians) | Typically the MSO (PE-owned) |
|---|---|---|
| Clinical decisions / patient care | Yes | No |
| Hiring and firing physicians | Usually, at least nominally | Often heavily influenced |
| Non-clinical staff | No | Yes |
| Billing and collections | No | Yes |
| Scheduling and hours | Shared / negotiated | Often significant control |
| Vendor and equipment decisions | No | Yes |
| Practice finances / distributions | Limited | Yes |
The line the law draws is clinical versus non-clinical: physicians must retain control over medical decision-making. But an enormous amount of what determines your day-to-day experience and your income, staffing levels, schedule density, which vendors and systems you use, how billing is handled, how much overhead is charged, sits on the business side that the MSO controls. A structure can leave you with complete clinical autonomy and still dramatically change how it feels to practice.
How the money flows in an MSO structure
Understanding the economics is as important as understanding control. In simplified terms, the clinical entity generates revenue from delivering care, and the MSO is paid a management fee for its services. How that fee is calculated is one of the most important terms in the entire arrangement.
The management fee might be a percentage of revenue, a fixed amount, a cost-plus figure, or a fair-market-value fee for defined services. The structure of that fee affects how much economic value flows to the PE-owned MSO versus staying with the physicians. Because the PE firm owns the MSO, the management fee is, in effect, one of the main ways the firm realizes the value of its investment over time.
For a physician, the questions are practical: How is the management fee calculated? Can it change over time? What services are actually included for that fee? Are there additional charges layered on top? A management fee that looks reasonable on day one can consume far more of the practice’s economics than expected if it is structured to grow or if “services” are defined loosely.
What a physician retains, and what they give up
The honest summary of an MSO structure is that you trade control and a share of future economics for upfront value, capital, and administrative relief. Whether that trade is good depends entirely on the terms and on your goals.
What you typically retain: ownership of the clinical entity, clinical decision-making authority, your license and professional autonomy over care, and, if you took it, rollover equity in the parent, which is its own separate consideration we cover in our guide on rollover equity.
What you typically give up: control over the business operations, a meaningful share of ongoing economics through the management fee, autonomy over staffing and scheduling, and often a degree of the culture and pace that made the practice yours. The employment agreement you sign at closing then governs your compensation and obligations going forward, which is why it deserves as much attention as the transaction itself.
What physicians should examine in an MSA
If a deal involves an MSO, the Management Services Agreement is where the real terms live. Key things to understand before signing:
- The term and termination. How long is the MSA, and under what circumstances (if any) can the clinical entity end it? Very long terms with narrow exit rights concentrate power in the MSO.
- The management fee. How it is calculated, whether it can change, and what services it actually covers.
- Scope of MSO authority. Exactly which decisions shift to the MSO and which the physicians keep, in writing, not by assurance.
- Clinical carve-outs. Confirmation that medical decision-making genuinely stays with the physicians, as the law requires.
- What happens if you leave. How your exit interacts with the MSA, your rollover equity, and any restrictive covenants.
These questions are best asked before a letter of intent is signed, because that is when your leverage is highest, one of the most common mistakes we see physicians make when selling a practice is treating the structure as a technicality to be worked out later.
Are MSO structures good or bad for physicians?
Neither, inherently. An MSO structure is a tool. In a well-negotiated deal with a strong platform, it can relieve physicians of administrative burden, bring professional management and capital, and still leave a fair share of economics and real autonomy with the doctors. In a poorly negotiated deal, it can hand over control and a large share of ongoing value while leaving the physician with a title and a diminished practice.
The determining factor is almost always the terms of the MSA and the surrounding documents, not the existence of the MSO itself. That is why understanding this structure, and having it reviewed from the physician’s side, matters so much when you are evaluating a private equity offer to buy your practice. The structure is standard. Whether the specific terms serve you is the question worth answering before you sign.
About Med Contract Law. Med Contract Law represents physicians and physician-owned practices in private equity and MSO transactions, from the first offer through the management services agreement and the employment terms that follow. We focus on the physician’s side of the structure: how much control you keep, how the economics flow, and whether the deal serves your long-term interests.
If your transaction involves an MSO or management services agreement, experienced physician-side counsel can help you understand what the structure actually does before you commit. Schedule a confidential consultation to talk through your situation.
Frequently asked questions
What is an MSO in healthcare? An MSO, or Management Services Organization, is a company that provides the non-clinical business functions of a medical practice — billing, staffing, scheduling, IT, purchasing, and management — in exchange for a management fee. In private equity deals, the PE firm typically owns the MSO while physicians retain the clinical entity.
What is the difference between an MSO and the medical practice? The medical practice (the clinical entity, a professional corporation or association) employs the physicians and delivers patient care. The MSO handles the business side. They are linked by a Management Services Agreement. Physicians must retain clinical control; the MSO handles operations.
Why do private equity firms use MSOs? Largely because of the corporate practice of medicine doctrine, which in many states bars non-physicians from owning medical practices. A PE firm cannot directly own the practice, so it owns the MSO (which anyone can own) and contracts with the physician-owned clinical entity through a management services agreement.
What is a Management Services Agreement (MSA)? The MSA is the long-term contract between the MSO and the clinical entity. It defines what services the MSO provides, the management fee, how much authority shifts to the MSO, and the term and termination rights. It is where the real control and economic terms of an MSO structure live.
Do I still own my practice under an MSO structure? Technically you usually retain ownership of the clinical entity, but the MSA can transfer substantial operational and economic control to the MSO. “Ownership” can mean considerably less than it sounds, which is why the MSA terms matter more than the ownership label.
How is the MSO management fee calculated? It varies — it may be a percentage of revenue, a fixed amount, cost-plus, or a fair-market-value fee for defined services. Because the PE firm owns the MSO, the management fee is a primary way it realizes value, so how the fee is structured and whether it can grow deserves close review.