Mainstay CSO isn’t just different… it’s new.

Mainstay CSO (Cooperative Support Organization) wasn’t designed to be like other models. We built something new from the ground up that brings practices together that ensures the perpetuity of independent dental care, growth opportunities and solutions to bolster the personal net worth of private dentists whether they’re looking to expand or build an exit strategy.


The market needs a

better solution.

 Mainstay CSO (Cooperative Support Organization) was born with a strong desire to preserve private dental practice.  Like you, we understand the financial underpinnings of consolidation and how private equity is capturing the majority of the “upside” of practice ownership from the doctors. The result can have a negative affect on the health of private practitioners and can challenge the very heart of great patient care.

Private practices must align their interests to protect independence.

Four pillars that bring
support, growth and scalability.

Doctor Led Strategy

Mainstay is led by the doctors who make up the organization. We work closely with our Mainstay doctors to inform the company on strategy and direction to serve every dentist’s career while enhancing work-life balance.

Driven by Innovation

Mainstay works with practices to introduce innovative solutions and digital technology to bring exemplary care to patients. This not only generates exceptional clinical results but will increase profitability to the bottom line.

Comprehensive Support

Mainstay offers a variable expense solution within our program. Rather than fixing costs and solutions, we can pick and choose from a comprehensive list of support solutions that provide member doctors’ practice freedom to be creative & cost-efficient.

Dentist-Centric Financial Model

Our unique model brings financial opportunities to dentists not available anywhere else in the industry. We are not a private equity model. By integrating a blend of cash and *stock options for all dentists in the Mainstay model, the potential financial upside is truly noteworthy.



The securities are offered through the Private Placement Memorandum and are being offered pursuant to the exemption from registration under the Securities Act of 1933, as amended (“Securities Act”) pursuant to Rule 506 (c) under Regulation D promulgated by the Securities and Exchange Commission (“SEC”). All prospective investors must certify that they are accredited investors, and provide either supporting documents or third-party verification, eligible for this type of illiquid investment, and must acknowledge that they have received and read all investment materials. Health Professionals Alliance Inc. is not a registered broker-dealer, investment company, investment advisor or crowdfunding portal and does not engage in any conduct requiring such registrations. The securities offered are speculative and are NOT insured by the FDIC or by any other Federal Government Agency, are NOT Bank deposits, are NOT guaranteed by any person or entity, and MAY lose value. Neither the SEC nor any federal or state securities commission or regulatory authority has recommended or approved any investment or reviewed the accuracy or completeness of any of the information or materials presented. Neither Health Professionals Alliance Inc. nor any of its directors, officers, employees, representatives, affiliates or agents shall have any liability whatsoever arising, for any error or incompleteness of fact or opinion in, or lack of care in the preparation or publication, of the materials or communications presented or the or that the valuation of any securities offering is appropriate. Prior results are not indicative of future performance and “forward looking statements” may be used in the materials; actual results may vary materially. All investors must make their own determination of whether or not to make any investment, based on their own independent evaluation of the investment and their risk tolerance.

What drives Mainstay?

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Mainstay’s mission is to support and preserve independent dental practices while striving to increase the annual income and net worth of the doctors it serves.

We’re a community of dental practices that enables dental teams to invest in themselves, grow together and perpetuate independent practice into the future.

Health Professionals Alliance (“HPA”), the parent company of Mainstay, is a company with a unique corporate structure that provides a rapidly growing ecosystem of goods and services, including aggregation and transition programs for its Dentist and Physician members & shareholders; this can also include an ownership stake in our company.

Ways we can work with you.

Whether you’re looking to purchase other practices, plan your exit or simply find ways to continue to grow… there is something for everyone in the Mainstay family.

Mainstay Dentists | Buyers

Mainstay works with practices who want to expand to multiple locations through acquisition. We partner with you to provide an abundance of solutions including unique financial solutions and management to help you scale.

Cornerstone Dentists | Sellers

Mainstay works with dentists seeking a transition strategy to retire or lessen their practice management burden. Rather than selling to a DSO, Mainstay collaborates with you to ensure you’re selling to another independent practice and maximize your practice value, including a guarantee.

Management Support

Some practices just want to focus on their patient care while receiving management support to free up time and handle the headaches. We can help…

Growing Practices

Not looking to buy or sell yet? No problem. Mainstay’s parent company, Health Professionals Allliance, provides a strong community platform as well as discounts on products and services to help you grow through our marketplace ecosystem.

Tell us your story.

Your future begins now. Schedule time with us and let's discuss what you're looking to do. If it's not as a member of our family, we'll let you know and point you in the right direction.

You're going to want to talk with Jeff Reece, from Mainstay. Jeff is a great listener and has years of dental experience to serve the community. Click on the link and get into a conversation with Jeff.


Send us your info. We’d be happy to reach out to you.

Mainstay CSO
8 North State St.
Suite 101
Lake Oswego, OR 97034