Running a medical practice in California requires more than providing excellent patient care. A physician who owns a successful practice may also have to manage employees, leases, technology, billing systems, marketing, payroll, equipment, vendors, compliance procedures, expansion plans, and increasingly complicated business relationships.
That creates a fundamental challenge: how can the business side of a medical practice become more sophisticated without allowing non-physicians to improperly control the practice of medicine?
One commonly used solution is a Management Services Organization, usually called an MSO. When properly structured, an MSO can handle or support many non-clinical business functions while the physician-owned medical practice retains authority over medical judgment and other decisions California law requires licensed professionals to control.
An MSO is not legally required for every California medical practice. A solo physician with a straightforward operation may have little reason to create a separate management company. However, an MSO can become increasingly important when a practice is expanding, bringing in business partners, working with outside investors, operating multiple locations, centralizing administrative services, or separating valuable business assets from the professional medical entity.
What is a Management Services Organization?
A Management Services Organization is a business entity that provides administrative and operational services to a medical practice. Instead of having the medical corporation directly employ or manage every non-clinical resource required to operate the business, certain functions can be provided through the MSO under a management services agreement.
The physician-owned professional practice continues to provide medical services. The MSO generally supports the infrastructure surrounding those services.
Depending on how the arrangement is structured, an MSO may provide services such as:
- Administrative staffing and management support
- Payroll and human resources administration
- Accounting and bookkeeping support
- Office management
- Information technology systems
- Marketing and advertising
- Scheduling infrastructure
- Vendor management
- Office space and equipment
- Revenue cycle and billing administration
- Purchasing and other non-clinical operational support
The exact division of responsibilities matters. Calling a company an “MSO” does not automatically make an arrangement compliant. California regulators and courts can look beyond the name of an entity or agreement and examine who actually exercises control over the medical practice.
Why California’s Corporate Practice of Medicine Rules Matter
California has one of the country’s more restrictive approaches to what is commonly called the Corporate Practice of Medicine, or CPOM.
California Business and Professions Code Section 2400 generally provides that corporations and other artificial legal entities do not possess professional rights, privileges, or powers. In practical terms, California’s framework is intended to prevent unlicensed individuals and businesses from controlling medical judgment simply because they provide capital, management services, office infrastructure, or other business resources to a practice.
The Medical Board of California has identified numerous decisions that must remain under appropriate physician control. These include decisions concerning diagnostic testing, referrals, treatment, overall patient care, and physician workload. California regulators have also focused on control involving coding and billing procedures, medical equipment, and medical supplies.
This is where an MSO structure can become valuable. It can create a legal and operational boundary between the professional practice of medicine and the business infrastructure supporting that practice.
The Medical Practice and MSO Are Different Businesses
A properly designed MSO arrangement normally involves at least two separate entities.
The first is the professional medical practice. In California, professional medical corporations are subject to specific ownership rules. At least 51% of the shares of a California professional medical corporation generally must be owned by licensed physicians and surgeons. Certain other licensed professionals may own the remaining shares within statutory limitations, but an unlicensed individual cannot simply own shares of the medical corporation.
The second entity is the MSO. The MSO provides agreed-upon non-clinical services to the medical practice. The relationship between the two entities is commonly documented through a Management Services Agreement, or MSA.
That separation can allow business professionals to contribute management expertise without improperly replacing the physician’s authority over medical care.
What Should a Management Services Agreement Address?
The MSA is one of the most important documents in an MSO structure. A generic management agreement downloaded from the internet may fail to address California’s healthcare-specific restrictions.
A carefully structured agreement should clearly identify what the MSO is responsible for and, just as importantly, what it is not authorized to control.
Depending on the arrangement, an MSA may address:
- The specific administrative services the MSO will provide
- The management fee and how it will be calculated
- Office, technology, equipment, or intellectual property arrangements
- Employee and contractor responsibilities
- Billing and administrative support procedures
- Access to information and records
- Insurance and indemnification provisions
- Confidentiality and data-security obligations
- Contract duration and termination rights
- Compliance responsibilities
- Dispute-resolution procedures
- Clear reservation of required professional authority to the medical practice
The written agreement should also match how the businesses operate in reality. A contract stating that physicians retain control will provide limited protection if the MSO actually dictates clinical staffing, treatment decisions, referrals, or other protected functions.
An MSO Cannot Be Used to Hide Improper Control
A common misconception is that forming an LLC, calling it an MSO, and signing an MSA automatically solves California’s corporate practice restrictions.
It does not.
California’s concern is substantive control. If a non-physician business effectively controls the professional corporation despite physician ownership on paper, the arrangement can create significant legal risk.
For example, a problematic structure could arise when an outside management company has contractual powers so broad that the physician owner cannot meaningfully control the medical practice. Similar concerns may arise when a management company attempts to dictate physician hiring or termination based on clinical competency, determine patient volume, control payer contracting parameters, direct coding decisions, or otherwise interfere with responsibilities reserved for the professional practice.
The goal should therefore be genuine separation, not merely paperwork creating the appearance of separation.
California Strengthened the Rules in 2026
The distinction between business management and clinical control became even more important following the enactment of California Senate Bill 351.
Effective in 2026, SB 351 specifically restricts private equity groups and hedge funds involved with physician and dental practices from interfering with professional judgment or exercising control over specified practice functions.
Among other restrictions, the law addresses control relating to patient medical records, certain hiring and firing decisions, payer-contract parameters, coding and billing decisions, medical equipment, and medical supplies.
Importantly, the law does not mean an outside organization can never provide advice or administrative assistance. It specifically contemplates assistance or consultation in certain areas when the physician or dentist retains ultimate responsibility or approval where required.
For medical businesses, investors, entrepreneurs, and physician owners, the lesson is significant: the details of an MSO’s contractual rights and actual operating authority matter more than ever.
MSOs and California’s Fee-Splitting Rules
Management compensation is another area that requires careful planning.
California Business and Professions Code Section 650 prohibits certain compensation or inducements for patient referrals. At the same time, California law recognizes that compensation for legitimate services other than patient referrals may, under appropriate circumstances, be calculated using a percentage of gross revenue or a similar arrangement when the consideration is commensurate with the value of the services or fair rental value of property or equipment provided.
That does not mean every percentage-based management fee is automatically acceptable.
The economics of an MSO arrangement should be evaluated carefully. Management fees that appear to disguise payment for referrals, transfer excessive professional revenue to an unlicensed entity, or provide compensation disconnected from the legitimate value of management services can create substantial compliance concerns.
Before choosing a fixed fee, percentage fee, cost-plus structure, or another compensation model, the parties should evaluate both the business economics and the legal implications.
Why Growing Medical Practices Consider an MSO
Compliance is only one reason to consider an MSO. A properly structured organization can also make a medical business easier to operate and expand.
Imagine a physician group opening several locations. Without centralized management, every location might separately negotiate vendors, hire administrative personnel, purchase software, manage marketing, and maintain back-office systems.
An MSO can potentially centralize those functions. The clinical entities remain responsible for medicine while the MSO creates operational consistency across the business.
This can be particularly useful for:
- Multi-location medical practices
- Telehealth businesses
- Medical spas and aesthetic practices
- Specialty physician groups
- Practices planning significant expansion
- Physicians working with non-physician business partners
- Healthcare businesses considering outside investment
- Organizations centralizing administrative services across several practices
For practices operating in san diego and throughout California, structuring the business correctly at the beginning can be considerably easier than attempting to repair an arrangement after investors, employees, leases, contracts, intellectual property, and significant revenue are already involved.
An MSO Can Help Separate Valuable Business Assets
Another potential benefit involves ownership of non-clinical business assets.
Depending on the structure, an MSO might own or manage certain technology, administrative systems, trademarks, websites, equipment, office infrastructure, or other non-professional assets. The medical practice can then obtain appropriate access to those resources through properly documented agreements.
This can create clearer financial and operational boundaries between the practice of medicine and the business platform supporting the practice.
Asset ownership should not be structured casually, however. Patient records, professional goodwill, equipment used for clinical purposes, intellectual property, leases, and other assets can raise different legal considerations. The structure should be designed around the specific business rather than copied from another healthcare company.
MSOs Are Also Receiving Greater Transaction Oversight
California’s healthcare regulatory environment continues to evolve. Assembly Bill 1415 expanded the categories of entities that may be required to provide notice to the California Office of Health Care Affordability in connection with qualifying material change transactions.
MSOs are among the entities specifically addressed by this newer framework. Whether a particular acquisition, affiliation, management agreement, asset transaction, or restructuring triggers a filing requirement depends on the facts and applicable statutory and regulatory thresholds.
This is especially important when developing an acquisition strategy. A transaction may make economic sense and satisfy corporate-practice requirements yet still create separate notice or regulatory obligations.
Healthcare transactions should therefore be analyzed before documents are signed and deadlines are established rather than after the parties expect to close.
Common MSO Structuring Mistakes
Many legal problems develop not because the parties intentionally tried to violate the law but because they treated a healthcare transaction like an ordinary business deal.
Common areas of concern include:
- Giving an MSO excessive authority over physicians or clinical personnel
- Using a physician owner who has ownership on paper but little real control
- Failing to clearly distinguish clinical decisions from administrative support
- Creating management fees without analyzing fee-splitting rules
- Using generic contracts that were drafted for another state
- Giving a non-physician entity excessive control over medical records
- Failing to coordinate the MSA with employment, lease, intellectual property, and financing agreements
- Creating termination provisions that effectively eliminate the physician’s independence
- Assuming that compliance at formation means the structure will remain compliant as the business grows
The best time to identify these issues is before the relationship begins.
Does Every California Medical Practice Need an MSO?
No. An MSO is a business and legal structure, not a universal California requirement.
A physician-owned practice with simple operations may have no practical reason to establish one. Creating another entity also brings additional contracts, accounting, tax, governance, and administrative responsibilities.
The stronger question is whether a particular medical business needs a clearer separation between professional medicine and non-clinical operations.
If a practice is bringing in a non-physician business partner, obtaining outside capital, expanding across locations, centralizing administrative services, licensing intellectual property, building a management platform, or preparing for a future transaction, an MSO may become a valuable part of the structure.
That determination should be made after reviewing the entire business model rather than simply forming an additional company.
Build the Structure Before Building the Business Around It
Healthcare businesses can grow quickly. A physician may begin with one location and a handful of employees, then add partners, investors, telehealth services, new locations, management personnel, trademarks, equipment financing, and complicated payer relationships.
Once those relationships are established, restructuring can become expensive and disruptive.
Developing the legal framework earlier can help clarify ownership, decision-making authority, compensation, intellectual property, management responsibilities, and exit rights before a dispute or regulatory concern appears.
A carefully designed MSO should accomplish two goals at the same time: provide an effective business infrastructure and preserve the professional independence California law requires.
How we can help
The Law Office of Kris Mukherji, APC helps business owners evaluate legal structures with attention to both immediate operational needs and long-term goals. For physicians, healthcare entrepreneurs, medical practice owners, and business partners considering an MSO, the details of ownership, management authority, compensation, contracts, and regulatory compliance can significantly affect the strength of the overall structure.
We provide personalized legal services and can help evaluate business entity formation, Management Services Agreements, ownership arrangements, operating relationships, contract terms, and related business-law concerns. If you are starting a California medical practice, adding a management company, working with outside business partners, restructuring an existing organization, or preparing for growth, obtaining legal guidance before the structure is finalized can help identify problems while they are still easier to solve.
The Law Office of Kris Mukherji, APC offers free case consultations. Contact our San Diego office to discuss your business and determine whether an MSO structure makes sense for your medical practice. The right structure should do more than look compliant on paper—it should create clear boundaries, support sustainable growth, and allow physicians to maintain the professional authority California law requires.
This material is provided for general informational purposes and does not constitute legal advice. Healthcare business arrangements should be evaluated based on their specific facts, contracts, ownership, compensation structure, and applicable state and federal requirements.