In a substantial number of states, only a licensed veterinarian may own a veterinary practice.
That rule comes from the corporate practice of veterinary medicine doctrine, and its stated purpose is to keep clinical judgement with clinicians rather than with business owners.
It is also the rule that the entire consolidation wave has had to be structured around — which is where the PC and MSO arrangement comes in.
The rule, and why it exists
Published analyses put the number at around eighteen states that bar non-veterinarians from owning a veterinary practice.
In much of the rest of the country, ownership or control by non-licensees is restricted in some form rather than freely permitted.
The underlying principle is the corporate practice of veterinary medicine doctrine — the veterinary counterpart of a rule that appears across licensed healthcare professions.
It restricts corporations and unlicensed individuals from employing licensed professionals to deliver professional services, on the reasoning that medical judgement should rest with the licensed professional rather than with whoever owns the business.
Whether you find that persuasive or paternalistic, it is the frame the statutes are built on, and it explains why the restrictions attach to ownership and control rather than to what happens in the exam room.
General information, not legal advice
The premises permit
Separate from who owns the entity is who is accountable for the site, and this catches people out because it survives even where ownership is unrestricted.
State schemes commonly require a licensed veterinarian to be named on the premises permit as the responsible licensee on-site.
That is a personal accountability mechanism: someone with a licence is answerable for what happens at that location.
The practical consequence for a manager or a non-veterinarian owner is that certain obligations cannot be absorbed into the business structure.
There has to be a named veterinarian, and their exposure is real — which is worth understanding before assuming a management arrangement moves all the risk.
So how do corporate groups own practices in those states?
This is the question the consolidation story turns on, and the answer is a two-entity structure.
A professional corporation (PC) — owned by a licensed veterinarian, as the state requires — holds the practice itself.
Alongside it sits a management services organization (MSO), an ordinary business entity that can be owned by anyone, including non-licensees and other companies.
The veterinarian-owned PC then leases or sells its non-medical assets to the MSO, and contracts with it for management services.
The clinical entity stays in veterinary hands on paper and in law; the operational and financial substance moves to the MSO.
The result is that a non-veterinarian owner participates in the financial returns of the practice through the MSO without themselves practising veterinary medicine or owning the clinical entity.
That structure is why corporate ownership has grown substantially even in states whose statutes appear to prohibit it.
What the MSO can and cannot touch
The line the structure is built to respect is the one worth understanding, because it is also the line that determines whether an arrangement holds up.
The licensed veterinarian is meant to retain control over clinical decisions, patient records, and supervision of other veterinarians.
Those are the elements the doctrine exists to protect, and they are supposed to stay on the clinical side of the wall.
The MSO takes the rest: premises, equipment, staffing administration, purchasing, billing systems, marketing, and the financial returns that flow from managing all of it.
Where arrangements get scrutinised is when the management side reaches into clinical territory — dictating protocols, controlling records, or effectively directing veterinarians.
The structure depends on that separation being real rather than nominal, which is exactly the tension the corporate versus private practice debate is about from the clinician's side.
Why this is contested
It would be misleading to present the PC/MSO structure as settled and uncontroversial, because it is neither.
Critics — including groups advocating legislative change — describe it as a mechanism to sidestep ownership rules, arguing that if the economic substance of ownership sits with a non-licensee then the doctrine's purpose is defeated regardless of who holds the shares.
There is active policy advocacy aimed at closing what its proponents regard as a gap.
Defenders argue the separation is genuine: clinical authority does remain with licensed veterinarians, and management expertise and capital are legitimate contributions that most independent practices cannot fund themselves.
Both positions are held sincerely by people who understand the structure well.
What matters for anyone making a decision is that this is a live policy area, not settled ground — and rules that look stable today are the subject of active legislative attention.
If you're buying, selling, or structuring
These are the questions that determine whether a deal is even possible in the shape you are imagining.
- Does your state restrict practice ownership to licensed veterinarians?
- If so, does it restrict ownership only, or control as well — and how is control defined?
- Who will be named on the premises permit as the responsible licensee?
- If an MSO is involved: exactly which assets and functions sit on which side?
- Who controls patient records, and where do they live?
- Who sets clinical protocols, and who can override them?
- Who supervises the veterinarians, in law and in practice?
- Has an attorney who structures veterinary transactions in your state reviewed it — with a CPA?
The last one is not boilerplate.
Ownership structure interacts with tax treatment, licensure, and the enforceability of everything built on top of it, and unwinding a structure afterwards is dramatically more expensive than designing it correctly.
If you're an associate thinking about ownership
The doctrine cuts in your favour here, and it is worth knowing why.
In states that reserve ownership to licensed veterinarians, your licence is not merely a qualification to practise — it is the qualification to own.
That is a genuine structural advantage over anyone with capital but no licence, and it is the reason a route to ownership remains a real differentiator of independent practice.
It also means the buyer pool for a retiring owner's practice is narrower in those states than a purely financial analysis would suggest, which affects both valuation and how transitions get structured.
What it does not mean is that ownership is straightforward.
Valuation, financing, and the buy-in mechanics are their own subject — and the practical realities of running the business are the substance of the practice manager's role.
Browse open veterinarian positions and note which practices mention a path to partnership; it is one of the clearer signals of how an independent practice thinks about its future.