PART 2 OF 4: Cross-Specialty Ownership Rules

Which licensed professionals can co-own a practice, and which cannot.

The question of who may co-own a multi-specialty practice is governed by specific California rules, and getting it wrong can invalidate the structure. The permissibility of a given combination depends on the licenses involved and the limits the law places on cross-professional ownership. This part examines the ownership rules that determine how specialties can be combined.

The baseline rule

A California professional corporation must be owned by licensed professionals, and it must be majority-owned by the profession the corporation is organized to practice. A medical corporation, for instance, must be majority-owned by physicians. This baseline shapes any multi-specialty arrangement built within a single professional corporation.

The limited cross-ownership allowance

California permits a limited minority interest in a professional corporation to be held by certain other licensed professionals identified by statute. This is what allows some cross-specialty and cross-profession ownership within one entity:

• The primary profession must retain majority ownership.
• Only specified categories of other licensed professionals may hold the minority interest.
• The permitted combinations are defined by statute and are not open-ended.

When one entity will not work

Where the desired specialties cannot lawfully co-own a single professional corporation, the group cannot simply force them into one entity. Instead, the specialties may need to operate through separate professional entities that are affiliated or linked, often through a management or administrative structure that coordinates them without violating the ownership rules. The inability to co-own one entity is a structural fact to design around, not a barrier to combining care.

Physician and allied professional combinations

Multi-specialty practices frequently involve physicians alongside allied health professionals. Whether and how these can share ownership depends on the specific licenses, and the analysis must be done for each combination rather than assumed. What works for one pairing of professions may not work for another.

Why precision matters here

Ownership eligibility is not an area for approximation. A structure built on an impermissible ownership combination can be invalid, with consequences for the practice's compliance and stability. Confirming that the intended ownership is lawful, for the specific licenses involved, is foundational to everything the practice does afterward.

How West Coast Health Law Can Help

We analyze cross-specialty ownership for California groups, confirming which combinations may share a single entity and designing affiliated structures where they cannot.

West Coast Health Law offers a FREE consultation which you may schedule by clicking the button on our website.

This article is provided for general informational purposes only and does not constitute legal advice or create an attorney-client relationship. Laws change and every practice is different; consult a qualified attorney about your specific circumstances.