For many licensed audiologists in California, professional life doesn’t follow a single track. It often involves balancing a clinical role with entrepreneurial ambitions.

State law, however, places unique requirements on how licensed professionals can structure their businesses, especially when the work touches on patient care or hearing aid dispensing. That’s why understanding the difference between a general stock corporation and a professional corporation is critical for anyone in the field.

Take Dr. Claire H., a licensed audiologist in Southern California. During the week, she worked full-time with a medical group, providing diagnostic testing and patient care under her audiology license. But alongside that position, Dr. Claire had envisioned owning an audiology practice in California and she wanted to launch her own side business: a hearing aid dispensing company. She envisioned this venture as a way to expand her reach, serve more patients, and build something independent from her employer.

Choosing a Business Structure for a Hearing Aid Dispensing Venture

At first, she assumed forming a general stock corporation would be enough since the new business would focus solely on dispensing hearing aids.

Because the startup costs were significant — new equipment, marketing, and office space — Dr. Claire also considered bringing in a physician partner who was interested in owning part of the business. On paper, it seemed like a smart way to share risk and raise capital. As they explored options, however, several complications surfaced.

Their first idea was to form a limited liability company (LLC), but California law prohibits licensed professionals from rendering professional services through an LLC, making that structure unavailable.

Next, they considered whether a professional audiology corporation might work, but quickly realized that only licensed audiologists or, in some cases, speech-language pathologists may own shares in such an entity. Since physicians are not permitted to be shareholders in an audiology corporation, her colleague could not legally join her in that structure.

Why She Chose a General Stock Corporation and Not a Professional Corporation

Though Claire could have formed a professional audiology corporation, she opted instead to establish a general stock corporation because the sole purpose of this new venture was to dispense hearing aids — and, having just earned her hearing aid dispenser’s license, that seemed like the best fit at the outset.

The solution they settled on was for each to form their own corporations — the physician creating a medical corporation, and Dr. Claire moving forward with a general stock corporation — and then collaborating between the two entities.

In the later part of this article, we’ll return to the challenges this choice created, particularly when Dr. Claire encountered resistance from insurance companies, which ultimately led her to convert from a general stock corporation into a professional corporation.

Success and the Insurance Roadblocks

For the first few years, Dr. Claire’s hearing aid dispensing business ran smoothly. Operating through her general stock corporation, she built a steady client base, invested in equipment, and carved out a niche separate from her full-time audiology practice. The model seemed to work: the corporation was structured around retail dispensing, and her patients appreciated the convenience and continuity of care.

But as the business grew, Dr. Claire wanted to expand further by joining insurance networks, including major providers like Blue Shield of California. That’s when she encountered an unexpected roadblock.

Why Blue Shield and CPOM Required a Professional Corporation

Under the Corporate Practice of Medicine (CPOM) doctrine and Blue Shield’s own contracting rules, corporations that provide professional services — even services tied to hearing aid dispensing — are required to operate as professional corporations, not general stock corporations. Because Dr. Claire’s entity was not structured as a professional audiology corporation, her application to join the network was denied.

This was a pivotal moment. To continue growing and to qualify for in-network participation with insurers, Dr. Claire would need to restructure her business. That meant converting her general stock corporation into a professional audiology corporation — a process that involved compliance with California’s Business and Professions Code, name-style requirements, and shareholder restrictions.

What began as a side venture had now matured into a professional enterprise, and it required the right legal foundation to support the next phase of growth.

Converting to a Professional Audiology Corporation

Realizing her business needed restructuring, Dr. Claire turned back to the question she had once set aside: is owning an audiology practice in California and operating under a professional corporation the way to go? This time, the answer was clear. To move forward with insurance providers and to bring her business fully into alignment with California law, she had to convert her entity. What had once felt like an abstract compliance issue had now become a practical necessity for her business.

Step One: Meeting California’s Audiology Corporation Name Requirements

The first hurdle was her company’s name. California requires that the name of a professional audiology corporation include one of the statutory terms such as “audiology,” “audiologist,” “audiological,” “hearing clinic,” “hearing clinician,” or “hearing therapist” — along with a corporate designator like “Inc.” or “Professional Corporation.”

Dr. Claire had invested heavily in branding her hearing aid business in the community, so she worked carefully to select a new corporate name that preserved the trust she had built with patients while meeting the state’s name-style rules.

Step Two: Following Shareholder and Ownership Restrictions

Next came ownership. Under California law, only licensed audiologists — and in some cases speech-language pathologists — may hold shares in an audiology corporation. Physicians, dentists, and other healthcare professionals are expressly excluded. This meant that her physician colleague could not join her as a shareholder.

Instead, they maintained separate professional corporations — his medical corporation and her professional audiology corporation — and structured their working relationship through contracts. While this required some adjustment from their original plans, it gave both businesses the ability to grow independently while collaborating where their services overlapped.

Step Three: Restructuring to Audiology Corporation Without Disrupting Operations

The actual conversion process took about a month. By amending her articles of incorporation and updating her corporate documents, Dr. Claire was able to retain her existing tax ID, keep her banking relationships intact, and preserve the business credit she had established. This continuity made the transition smoother and less disruptive for her day-to-day operations.

The Outcome: Insurance Eligibility and Long-Term Stability

When the process was complete, Dr. Claire’s business had a stronger legal and financial foundation. Most importantly, she was now eligible to participate in major insurance networks.

Patients could access her services through their health plans, her practice could compete on a larger scale, and she could finally move forward with confidence that her business structure aligned with both state law and industry expectations.

Common Questions About Owning an Audiology Practice in California

Q1: Why can’t audiologists use an LLC?

In California, licensed professionals — including audiologists — are prohibited from practicing through a limited liability company (LLC). This rule is set out in the California Corporations Code and reinforced by the Speech-Language Pathology and Audiology Licensure Act. Audiologists may instead choose from a sole proprietorship, a professional corporation, or, in some cases, a registered limited liability partnership.

Q2: Why does insurance matter when choosing a corporation type?

As Dr. Claire discovered, many health insurance networks — including Blue Shield of California — will not contract with a general stock corporation for audiology-related services. These insurers require that professional services be rendered through a professional corporation in order to meet the Corporate Practice of Medicine (CPOM) doctrine. If you plan to participate in insurance networks, forming a professional audiology corporation is often essential.

Q3: Who can be an owner or shareholder in an audiology corporation?

California law is very specific about ownership. Only licensed audiologists — and in limited cases, licensed speech-language pathologists — may be shareholders in an audiology professional corporation. Physicians and other healthcare providers may not hold stock in the entity, although they can form their own professional corporations and collaborate through contracts.

Q4: What are the naming rules for an audiology corporation?

The Business and Professions Code requires that the name of an audiology corporation include one of these terms: “audiology,” “audiologist,” “audiological,” “hearing clinic,” “hearing clinician,” or “hearing therapist.” A corporate designator like “Inc.,” “APC,” or “Professional Corporation” must also be included. This ensures the public can clearly identify the company as a professional entity.

Q5: Should I form a new professional corporation or convert my existing corporation?

You have both options. Forming a new professional corporation may be the simplest path if you are just getting started. However, if you already operate as a general stock corporation, conversion can be the more strategic move. Conversion allows you to keep your tax ID number, preserve your credit history, and maintain established relationships with banks, vendors, and agencies. This continuity can be very valuable, especially for businesses that have been operating for several years.

Q6: When is the best time to form a professional audiology corporation?

Timing depends on your goals. If you are preparing to open a new practice or expand into insurance networks, it is usually best to form your professional corporation before you begin operations. For those already running a business through a general stock corporation, conversion can be done at any time, but sooner is better if you plan to contract with insurers or want to avoid delays in tax filings. The process typically takes about 30 days.

Q7: How do taxes work for a professional audiology corporation?

By default, a professional corporation in California is taxed as a C corporation. However, most small professional practices elect S corporation status with the IRS, which allows profits and losses to pass through to the shareholder’s personal tax return and avoids double taxation. Choosing the right tax structure should be done with guidance from both legal and tax advisors to ensure the corporation is set up in the most efficient way for your specific situation.

Conclusion: Lessons from Dr. Claire’s Journey 

Dr. Claire’s experience highlights a common reality for many professionals: what seems like a simple business decision at the outset can grow into a complex legal and compliance issue as the practice expands. By initially forming a general stock corporation, she was able to get her hearing aid dispensing business off the ground quickly. But when it came time to contract with insurance companies, the structure no longer worked. Converting to a professional audiology corporation gave her the compliance she needed, the continuity she valued, and the foundation for long-term growth. 

Every audiologist’s journey is different, but the underlying lesson is the same: choosing the right corporate structure from the start can save time, money, and frustration down the road. For professionals focused on owning an audiology practice in California, that corporate choice can determine whether growth opportunities—like insurance participation—remain open or become a barrier.

Need Help Starting an Audiology Corporation in California?

If you are a licensed audiologist in California and are considering forming a professional audiology corporation or a corporation to dispense hearing aids, we would be delighted to assist you. Please call the Law Offices of Gale and Vallance at (714) 634-4838 to schedule a consultation.