If you are building a healthcare business as a non-physician entrepreneur, you have almost certainly encountered the terms MSO and PC. These two entities form the backbone of a compliant healthcare business structure in states that enforce the Corporate Practice of Medicine (CPOM) doctrine. Understanding how each entity works, and how they relate to each other, is essential before you launch or scale your practice.
What Is a Professional Corporation (PC)?
A Professional Corporation is a legal entity formed under state law specifically for the purpose of delivering licensed professional services. In healthcare, the PC is the entity that employs or contracts with physicians, nurse practitioners, and other clinicians who deliver patient care.
The defining characteristic of a PC is its ownership restriction. In CPOM states, only a licensed physician (or in some states, a licensed healthcare professional of the same discipline) may own a PC that delivers medical services. This rule exists to ensure that clinical decision-making remains in the hands of licensed professionals, free from commercial pressure by unlicensed business operators.
- The PC holds the medical licenses and enrolls in insurance panels
- It employs or contracts with all clinical staff
- It is responsible for clinical protocols, standards of care, and patient records
- It must be owned by a licensed physician in most CPOM states
What Is a Management Services Organization (MSO)?
A Management Services Organization is a separate business entity, typically an LLC, that provides non-clinical administrative and operational support to the PC. The MSO handles the business side of the practice so that the physician owner of the PC can focus on clinical oversight.
The MSO can be owned by anyone, including non-physician entrepreneurs, investors, and private equity groups. This is the entity through which most healthcare entrepreneurs actually build and grow their business.
Common services provided by the MSO include:
- Billing, coding, and revenue cycle management
- Marketing, branding, and patient acquisition
- Office space leasing and equipment procurement
- Human resources for non-clinical staff
- Technology infrastructure, including EHR systems
- Financial management and bookkeeping
The Firewall Between MSO and PC
The most critical concept in the MSO-PC structure is the firewall between the two entities. This firewall ensures that the MSO never exercises control over clinical decisions. Regulators and courts look closely at whether the non-physician-owned MSO is, in practice, directing the medical judgment of the PC's clinicians.
The fundamental rule: the MSO manages the business, and the PC controls the medicine. Any arrangement that blurs this line puts the entire structure at risk.
Signs that the firewall has been breached include the MSO dictating treatment protocols, the MSO hiring or firing physicians without PC involvement, or the MSO setting clinical productivity quotas that influence medical decision-making. Regulators in states like California, New York, and Texas actively investigate these arrangements.
The Management Services Agreement (MSA)
The contract that binds the MSO and PC together is the Management Services Agreement. This document is the single most important legal instrument in the entire structure. A well-drafted MSA accomplishes several things:
- Defines the scope of services the MSO will provide to the PC, limited strictly to non-clinical functions
- Establishes fair market value compensation so the arrangement does not run afoul of anti-kickback statutes or fee-splitting prohibitions
- Preserves physician autonomy with explicit language ensuring the PC retains full authority over clinical decisions, hiring of clinicians, and patient care standards
- Sets termination provisions that allow the PC to exit the arrangement if clinical independence is ever threatened
The compensation model in the MSA requires particular attention. Many states prohibit fee-splitting, meaning the MSO cannot simply take a percentage of the PC's medical revenue. Instead, the MSO typically charges a flat management fee or a fee based on the actual cost of services rendered, plus a reasonable margin.
Ownership Rules Vary by State
Not every state enforces CPOM with the same rigor. Some states, like California and New York, have strong CPOM doctrines that strictly require physician ownership of any entity practicing medicine. Others, like Arizona and several states in the Southeast, have relaxed or eliminated CPOM restrictions, allowing non-physicians to own practices directly.
Even in states without strict CPOM, the MSO-PC model can still be valuable. It creates clear organizational boundaries, protects physician autonomy, and establishes a structure that scales predictably across multiple jurisdictions.
Getting Started with the Right Structure
Whether you are launching a single-state telehealth platform or a multi-location clinic network, getting your MSO-PC structure right from day one saves enormous legal expense and regulatory risk down the road. The key is working with advisors who understand both the legal requirements and the operational realities of running a healthcare business.
At Foundry PC, we help entrepreneurs establish compliant MSO-PC structures, source friendly physician owners, and draft management services agreements that hold up to regulatory scrutiny. If you are unsure whether your current structure meets CPOM requirements, now is the time to find out.