Who Can Own a California Medical Corporation? Three Rules, Two Caps, No Exceptions for Anyone Else
California-licensed physicians must own the majority of a professional medical corporation. A statutorily defined list of other licensed professionals may hold minority shares, subject to two caps — an aggregate percentage limit and a headcount limit. No one else may own shares in any amount: not founders, not investors, not spouses, not entities.
Who’s Asking
This question almost always arrives with a specific person attached: the NP or PA you want to make a partner; the co-founder or investor who assumed equity was on the table; the spouse wondering about their stake; the retiring partner’s estate; or the diligence analyst checking whether the cap table in front of them is lawful. The rules below answer all of them — and the table answers them fast.
The Three Rules
California medical-corporation ownership runs on three rules, anchored in the Moscone-Knox framework and Corporations Code § 13401.5:
Rule 1 — Physicians hold the majority. California-licensed physicians and surgeons must own more than half the shares. Always. There is no structure, class of stock, or side agreement that changes it.
Rule 2 — Listed licensees may hold the minority, within caps. The statute names the other licensed professions eligible for minority ownership — categories have included podiatrists, psychologists, registered nurses, optometrists, physician assistants, chiropractors, acupuncturists, and other listed professions. The list is statutory, amended over time, and must be checked against current text before any share moves — never assume a profession is on it from memory or a blog post, including this one.
Rule 3 — No one else. At all. Individuals without a qualifying license, entities of every kind — LLCs, corporations, funds, holding companies — and any instrument designed to simulate ownership: all excluded, in any amount.
The pattern to internalize: Rules 1 and 3 are absolute; Rule 2 is a defined, capped exception. Most ownership mistakes come from treating Rule 2 as flexible or Rule 3 as having a de-minimis exception. Neither is true.
Can ___ Own Shares?
Legend: ✅ = yes · ⚠️ = minority only, within caps · ❌ = no. Verify every listed-licensee row against current § 13401.5 text before relying on it.
| Can they own shares? | Answer | The conditions |
|---|---|---|
| A California-licensed physician | ✅ Yes | Physicians as a group must hold the majority |
| A nurse practitioner / RN | ⚠️ Minority only | If on the current statutory list, within both caps (verify current list) |
| A physician assistant | ⚠️ Minority only | Same — listed-licensee treatment, within caps (verify) |
| Another listed licensee (podiatrist, psychologist, etc.) | ⚠️ Minority only | Per the current statutory list and caps (verify) |
| A licensee whose profession isn’t on the list | ❌ No | The list is the list — adjacent licensure doesn’t qualify |
| A non-licensed co-founder or investor | ❌ No | In any amount, through any instrument |
| A spouse without a qualifying license | ❌ Not as a shareholder | Community-property questions about the value of a licensed spouse’s shares are a separate analysis — see edge cases below |
| An LLC, fund, or holding company | ❌ No | Entities can’t hold professional shares |
| A deceased shareholder’s estate | ⚠️ Temporarily | The disqualification/death transfer mechanics run on a statutory clock — the shares must move to qualified hands (verify current window) |
| An MSO | ❌ Never | The MSO’s ownership is of itself — its relationship to the practice is contractual, full stop |
A ⚠️ or ❌ describing someone on your cap table today? Speak with MedBiz Law → — sooner is smaller.
The Two Caps, Explained
Rule 2’s exception is bounded twice:
The percentage cap. Listed minority licensees are limited in the aggregate share they may hold — the physician majority isn’t just a floor at 50%-plus-one; the statute caps what the minority professions may collectively own. (Confirm the current aggregate limit against § 13401.5 at publication.)
The headcount cap. The number of minority-licensee shareholders may not exceed the number of physician shareholders — a two-physician corporation can’t carry five NP shareholders regardless of how small their stakes are. It’s the cap groups most often discover late, usually mid-promise.
Design consequence: model the cap table before offering anyone equity. The caps interact — a growing group can satisfy the percentage cap and violate the headcount cap in the same transaction — and a promised stake that the statute won’t permit is a partnership problem no one enjoys unwinding.
Governance Follows the Shares
Ownership rules reach into the boardroom: directors and officers must generally be qualified licensees, with narrow exceptions for small corporations (verify current scope). Practically: the cap-table analysis and the leadership analysis are one analysis — a minority NP shareholder within the caps is one question; that shareholder as an officer is a second, related one. (The governance layer in full: Professional Medical Corporations →)
The Edge Cases That Generate Phone Calls
Three recurring situations, each with the same honest answer — this is a defined analysis, not a guess:
- The non-licensee spouse. Not a shareholder, ever — but in a community-property state, the economic value of a licensed spouse’s shares can be part of the marital estate, which is exactly why divorce is a triggering event your buy-sell agreement should anticipate. The corporate-law answer and the family-law analysis are different questions; get both from the right counsel.
- Death and estates. The statute anticipates it: a transfer clock starts, and the shares must reach qualified hands. Corporations with mechanics drafted in advance run a process; the rest improvise during a family’s worst month. (The mechanics: Moscone-Knox, function four →)
- “Creative” instruments. Options, phantom equity, convertibles, revenue shares designed to give a non-licensee ownership-like rights in the practice — the analysis looks past labels to substance, the same way California reads everything else in this space. The lawful home for non-licensee economics is the MSO, and it’s a genuinely good home. (Why: MSO Structures →)
The Non-Compliant Cap Table: How It Happens, How It’s Fixed
How it happens is rarely scandalous: a founding “partner” who never had the license; shares that drifted past the caps as the group grew; an estate that never completed the transfer; a listed-licensee assumption that was true under an older version of the statute. How it’s found is predictable: a payer enrollment, a financing, a sale, or a dispute.
The fix path runs in order: map the current table against the current statute; sequence the corrections (transfers to qualified hands, redemption mechanics, MSO-side restructuring for the non-licensee’s economics); paper it properly; and install the machinery — buy-sell, transfer restrictions, the caps modeled — so it doesn’t recur. Earlier is cheaper at every step.
How MedBiz Law Helps
We model cap tables before equity is promised, audit them when questions arise, and repair them when the answer is already no — including restructuring a non-licensee’s economics onto the MSO side where they lawfully belong. If the quick-answer table above returned a ⚠️ or ❌ for someone already holding shares, that’s the engagement, and sooner is smaller.
Legal services are provided by Bay Legal, PC, a California law firm.
Common Questions
Can a nurse practitioner be a partner in a California medical corporation?
Can my husband or wife own part of my medical corporation?
Can an investor get equity in the practice through options or convertible notes?
What are the ownership caps for non-physician licensees?
What happens to shares when a physician shareholder dies?
Our cap table has a problem. How bad is the fix?
Check the Table Before the Promise
Equity conversations are easier before the statute has an opinion about them. Model the cap table first — or repair the one you have.
Explore Professional Corporations → · Read FAQs →
Corp. Code § 13401.5 — read the statute at leginfo.legislature.ca.gov →
MedBiz Law addresses California law only. Healthcare-business laws differ significantly by state.