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Illinois · Sell-Side M&A
Illinois enforces the corporate practice of medicine, so a physician-owned corporation must be the sole owner of the clinical practice, and a non-physician buyer cannot own it. That single rule is why an Illinois sale runs through a friendly-PC and MSO structure, and structure is exactly where value is won or lost. We represent Illinois owners only, and we build the deal around the rules instead of around the buyer.
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Illinois's Real Differentiator
Illinois has enforced the corporate practice of medicine since 1935. A physician, or a physician-owned corporation, must be the sole owner of a medical facility in the state, and a non-physician, a private equity firm, or a general corporation cannot own the clinical practice or control medical decisions. That single rule is why an Illinois sale is never an off-the-shelf company purchase, and why structure decides whether your deal closes and at what price.
The lawful path is a physician-owned professional corporation that keeps the clinical practice, paired with a management services organization that provides non-clinical business services for a fee. The MSO is what a non-physician buyer actually owns and capitalizes.
Practitioners operate through a Professional Corporation or a Professional Limited Liability Company, owned 100% by licensed physicians, and registered with the Illinois Department of Financial and Professional Regulation. A buyer needs that entity clean and documented before close.
The Illinois Medical Practice Act, 225 ILCS 60, governs licensure, and 225 ILCS 60/22 restricts fee-splitting, direct or indirect. The MSO arrangement has to be built so management fees never read as a split of medical revenue.
The MSO can handle branding, marketing, real estate, payroll, HR, accounting, and billing, everything except the administration of medical services. The physician-owned entity keeps sole control of clinical decisions and the fees it charges and collects.
Illinois has restricted the corporate practice of medicine since 1935, with courts holding that a corporation cannot practice medicine. The Illinois Medical Corporation Act also governs physician-owned medical corporations. Accurate as of June 2026. Sources: AmSpa Illinois corporate-practice article, Permit Health and Zivian Health Illinois CPOM guides, and the Jackson LLP Illinois MSO guide (linked in our sources).
| Metric | Illinois | Note |
|---|---|---|
| Illinois population | ~12.6M | Sixth-most populous US state |
| State-level med spa count | Not published | AmSpa reports national totals only |
| Anchor metro | Chicago | Concentration of practices |
AmSpa's State of the Medical Spa Industry report publishes a national med spa count only and includes no state-by-state breakdown or ranking. Population figure is a US Census Bureau estimate.
Market Reality
AmSpa's State of the Medical Spa Industry report publishes a national med spa count only, with no state-by-state breakdown or ranking, so we will not cite an uncitable Illinois figure. What is verifiable is scale: Illinois is the sixth-most populous state in the country at roughly 12.6 million residents, and it pairs that scale with a buyer-friendly concentration of practices around Chicago. That is the consolidation backdrop an Illinois seller is sitting in.
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Estimate only. A ballpark from limited inputs plus published industry M&A benchmarks.
What Moves Value Here
No Illinois-specific sale multiple is published, and we will not invent one. The honest anchor is the national vertical range already on our med spa, cosmetic dermatology, and plastic surgery hubs. What changes an Illinois seller's realized value is how the deal has to be built, because the corporate-practice rule forces the friendly-PC and MSO split.
Because the deal runs through a physician-owned-PC and MSO wrap, a buyer is paying for the MSO's management-fee stream and the durability of the PC relationship, not a clean equity purchase. A cleanly structured practice transacts faster and holds its multiple.
Map my structure →A defensible MSO agreement, a 100% physician-owned entity, and a fee structure that does not read as fee-splitting under 225 ILCS 60/22 all hold value in diligence. A non-compliant or sloppy structure becomes a discount a buyer will press for.
See the Illinois rules →National platforms are consolidating dermatology and aesthetics, with documented Midwest and Illinois activity. Real buyer competition for Illinois assets is what supports the national range for a well-prepared seller.
Who is buying →We reference the national vertical multiple range published on our practice-type hubs. We do not publish an Illinois-specific multiple, because none exists in a citable, defensible form. Your real range comes from a confidential, practice-specific analysis of your earnings, your structure, and your comps.
Who Is Actually Buying in Illinois
An Illinois seller does not depend on one local acquirer. Well-capitalized national platforms and PE-backed MSOs buy here, and there is a documented, in-state proof point: in January 2024, Schweiger Dermatology Group acquired United Skin Specialists, which operated ten offices across Illinois, Minnesota, and Missouri and brought 35 providers into Schweiger. That same practice had earlier taken private equity from Tonka Bay Equity Partners in 2015. We will never name a "local buyer" that does not exist.
Detail bars are redacted by design. Every name and activity claim on this board is published from verifiable records; anything beyond the public record stays confidential. Schweiger / United Skin Specialists is the in-state proof point, documented in a PRNewswire announcement dated January 9, 2024, which also records the 2015 Tonka Bay investment. The other platforms are named as national consolidators active in the dermatology and aesthetics vertical, per Physician Growth Partners and CT Acquisitions market updates. No local-only buyer is asserted.
Illinois Sale FAQ
Not the way they would buy a normal business. Illinois enforces the corporate practice of medicine, so a physician or a physician-owned corporation must be the sole owner of the medical facility, and a non-physician investor cannot own the clinical practice or control medical decisions. The lawful path is the friendly-PC and MSO structure: a physician-owned professional corporation keeps the clinical practice, and a separate management services organization, the part the investor owns and funds, provides non-clinical business services for a fee. That is why an Illinois sale is a structured transaction, not a simple stock or asset sale.
Illinois has enforced the corporate practice of medicine doctrine since 1935, and courts have held that a corporation cannot practice medicine. In practice, a licensed practitioner must operate through a physician-owned professional entity such as a Professional Corporation or a Professional Limited Liability Company, registered with the Illinois Department of Financial and Professional Regulation. The Illinois Medical Practice Act, 225 ILCS 60, governs licensure, and 225 ILCS 60/22 restricts fee-splitting. For a sale, this means a buyer will require a clean, well-documented physician-owned entity and a defensible MSO arrangement. A practice that is not compliant on day one becomes a diligence and value risk.
A management services organization, or MSO, is the company a non-physician buyer can own. It contracts with the physician-owned practice to handle the non-clinical side: branding, marketing, real estate, payroll, human resources, accounting, and billing, everything except the administration of medical services. The physician-owned entity keeps sole control over clinical decisions and the fees it charges and collects. The MSO cannot share in medical revenue or control medical judgment. Compensation to the MSO is structured to fluctuate with the volume of business the practice conducts. This split is what makes an investor’s purchase of an Illinois practice possible.
No. There is no published Illinois-specific multiple, and we will not quote one. What we use is the national vertical range for your practice type, then we explain how Illinois law and market move structure and value. Because Illinois forces a physician-owned-PC and MSO split, value is delivered through the MSO management-services stream and the strength of the friendly-PC structure, not through a buyer simply purchasing equity in the clinical entity. A clean, compliant structure transacts faster and holds its value. A sloppy or non-compliant one invites re-trading and discounts. Your real number comes from a confidential, practice-specific analysis.
Demand is national and verifiably present in the Midwest. In January 2024, Schweiger Dermatology Group acquired United Skin Specialists, which operated ten office locations across Illinois, Minnesota, and Missouri, bringing 35 providers into Schweiger. That same practice had earlier received private equity investment from Tonka Bay Equity Partners in 2015, which shows repeat institutional interest in Illinois and the Midwest. Dermatology and aesthetics are among the most consolidated physician markets in the country, with national platforms such as U.S. Dermatology Partners, Forefront Dermatology, Anne Arundel Dermatology, and Schweiger Dermatology Group active in the vertical. The accurate picture is well-capitalized national platforms buying in Illinois, not a single local acquirer.
Illinois is a substantial market, anchored by Chicago. AmSpa’s State of the Medical Spa Industry report publishes a national med spa count only, with no state-by-state breakdown or ranking, so we will not cite an uncitable Illinois figure. What is verifiable is scale: Illinois is the sixth-most populous state in the country, with roughly 12.6 million residents per US Census Bureau estimates, and carries a buyer-friendly concentration of practices around Chicago.
Yes, unless and until you choose to tell people. We run every process under strict confidentiality, with confidentiality agreements, secure data rooms, staged disclosure, and a vetted buyer process. Premature disclosure can unsettle staff, shake patient confidence, and weaken your negotiating position, so you decide what is shared, with whom, and when. As a sell-side-exclusive advisor, we represent you and never the buyer, so there is no conflict over whose interests come first.
Match Your Practice Type
How recurring and membership revenue, provider capacity, and key-person risk set a med spa's value, paired with the Illinois structure work above.
Med spa sell-side →Dermatology is where Illinois's documented in-state consolidation is happening, and where a cosmetic derm practice is valued for sale.
Cosmetic derm sell-side →The valuation and deal-structure work for a surgical aesthetic practice, mapped to Illinois's corporate-practice rules.
Plastic surgery sell-side →By Metro
Compare every market on the Sell by State directory.
Chicago buyer activity, mapped to Illinois corporate-practice structure.
Selling in Chicago →
Who you work with
Bill Walker founded Aesthetic Brokers after leading mergers and acquisitions for a large private-equity-backed healthcare services organization. Before that he flew for the Marine Corps at the Presidential Helicopter Squadron and commanded a squadron in combat. He knows how an investor values a practice, and how to make sure that value lands with you, not the buyer.
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