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The corporate practice of dentistry (CPOD) case canon, annotated by jurisdiction, procedural posture, holding, and operational consequence. The decisions cluster around early chain-dentistry cases and the later OCA/OrthAlliance disputes, but they do not create one national doctrine. For the medical canon, see CPOM case law on the MSO-PC Wiki; use the same discipline of separating holding from allegation, while returning to the dental act and entity law governing each arrangement.

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The foundation era, 1901–1936

The first wave concerned chain “dental parlors” run under trade names by lay corporations. Boards and prosecutors sued the corporations, disciplined the dentists who worked for them, and later secured statutes that codified those results. All three forms of regulation remain in use.

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Hannon v. Siegel-Cooper Co.

Citation: 167 N.Y. 244 (1901) · Jurisdiction: New York Court of Appeals · Opinion Facts: A Manhattan department store advertised and operated a dentistry department. Sued by an injured patient, it argued that since it could not lawfully practice dentistry, it could not be liable for its dentists’ malpractice. Holding: Judgment for the patient. A corporation cannot lawfully practice dentistry by hiring dentists to act for it. But a corporation that held itself out as the provider of care cannot invoke its own illegality to escape respondeat superior liability. Why it matters: The lay-entity prohibition in New York is a century and a quarter old, and the case establishes the doctrine’s oldest practical warning: holding out to the public as the provider of care creates provider-grade liability. A DSO whose branding blurs the line between the support organization and the practice invites both regulatory action and direct malpractice exposure.

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Winslow v. Kansas State Board of Dental Examiners

Citation: 115 Kan. 450, 223 P. 308 (1924) · Jurisdiction: Kansas Supreme Court · Citation record Facts: A licensed Kansas dentist worked on salary-plus-commission for the “Eastern Dental Company,” a Missouri corporation running dental parlors under its own trade name. The company advertised, contracted with patients, and collected the fees; the dentist’s name appeared only on the operating-room wall. Substantive rule: A licensed dentist who acts as the anonymous instrument of a lay corporation trading under its own name practices “under a name other than his own” within the discipline statute’s reach. The law reaches the arrangement, not only the sign. Why it matters: The earliest case in the canon, and the purest example of licensee-side enforcement: the corporation is beyond the licensing act, so the board reaches the arrangement through the dentist’s license. The Kansas Supreme Court was still citing this line in a corporate-practice case in 2018.1 Modern lesson: whose name is on the door and the website is regulated, which is why well-drafted structures put the trade name with the professional entity or comply with the state’s dental assumed-name rules.

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People v. Painless Parker Dentist

Citation: 85 Colo. 304, 275 P. 928 (1929) · Jurisdiction: Colorado Supreme Court · Citation record Facts: The district attorney proceeded directly against “Painless Parker Dentist,” a California corporation running dental offices in Colorado, for unlawfully usurping the franchise of practicing dentistry. The trial court dismissed on demurrer. Holding: Reversed. The state may proceed against the entity itself because a corporation cannot hold the franchise of practicing dentistry. Why it matters: The template for entity-side enforcement. The state need not wait to discipline individual dentists; it can attack the lay company directly. The modern equivalents are attorney general actions against DSOs and statutes making the entity’s conduct itself the offense.

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State v. Bailey Dental Co.

Citation: 211 Iowa 781, 234 N.W. 260 (1931) · Jurisdiction: Iowa Supreme Court · Citation record Facts: Iowa proceeded against a corporation that owned the equipment and offices of a dental operation, employed licensed dentists to treat patients, and took the receipts as corporate revenue. Holding: A corporation that employs licensed dentists is itself engaged in the unlicensed practice of dentistry. The license attaches to individual training and character, which a corporation cannot possess. Why it matters: This is a clear early statement of the employment theory: hiring the dentist is practicing dentistry. Modern statutes that define practicing dentistry to include employing or engaging a dentist reflect the same principle. That is why the professional entity, rather than the DSO, generally employs clinicians where this rule applies.

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Painless Parker v. Board of Dental Examiners

Citation: 216 Cal. 285, 14 P.2d 67 (1932) · Jurisdiction: California Supreme Court · Citation record Facts: “Painless” Parker was a licensed dentist who legally changed his first name to match his advertising. He organized a corporation to own and operate his chain of dental offices, arguing that it handled only the “business side”: premises, equipment, staff, advertising, and collections. The Board found that the corporation was unlawfully practicing dentistry and suspended Parker’s license for his role. Holding: Discipline upheld, and the business/professional division rejected. A license presupposes “consciousness, learning, skill and good moral character, all of which are individual characteristics, and none of which is an attribute of an artificial entity”; the law “does not assume to divide the practice of dentistry into such departments … The subject is treated as a whole.”2 Why it matters: This is one of the most frequently cited corporate-practice decisions in California dental MSA analysis. The “we only run the business side” defense failed because the lay entity controlled the enterprise, and the dentist’s own license was at risk. A friendly-PC owner therefore needs genuine authority and independent advice. The holding itself is narrower: a board may discipline a licensee for practicing through a lay corporation. California’s professional-corporation statutes now permit dentist-owned corporations to practice, while the prohibition on lay corporate practice remains in force. The California attorney general applied it in the 2026 Aspen Dental settlement.3

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Dr. Allison, Dentist, Inc. v. Allison

Citation: 360 Ill. 638, 196 N.E. 799 (1935) · Jurisdiction: Illinois Supreme Court · Opinion Facts: A corporation running a Chicago dental office through an employed dentist sued to enforce his covenant not to compete after he left. Holding: No enforcement. A corporation cannot practice dentistry; “operating” a dental office by employing a dentist is practicing the profession; and equity will not enforce a restrictive covenant ancillary to an illegal business. Why it matters: An early illegality-defense example: the court refused to enforce the covenant ancillary to the unlawful arrangement before it. Whether another contract, covenant, severable term, restitution claim, or receivable fails depends on the governing law, claims, parties, and contract; do not turn the result into automatic nationwide forfeiture.

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Semler v. Oregon State Board of Dental Examiners

Citation: 294 U.S. 608 (1935) · Jurisdiction: U.S. Supreme Court (Hughes, C.J., unanimous) · Opinion Facts: Oregon authorized license revocation for advertising professional superiority, prices, free examinations, guaranteed work, and “painless” dentistry. A dentist who did all of these challenged the statute under the Due Process Clause, arguing his ads were truthful. Holding: Affirmed. A state may forbid such advertising even if truthful. The Court said the police power protects “not only against deception, but against practices which … tend nevertheless to lower the standards of the profession and demoralize it.” Why it matters: This is not an ownership case. It upheld broad state regulation of the commercial practice of dentistry under rational-basis review. Modern commercial-speech doctrine has weakened the decision’s treatment of truthful-advertising bans, but not its basic police-power reasoning. NC Dental v. FTC, discussed below, later established that dental boards enforcing professional rules remain subject to federal antitrust law.

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The OCA/OrthAlliance wave, 2002–2010

Orthodontic Centers of America and OrthAlliance (merged 2001) were publicly traded practice-management companies. Their interlocking purchase, service, and employment agreements had terms as long as forty years and gave the company the offices, equipment, staff, billing, and bank account. Orthodontists across the country sued to leave those arrangements, arguing that the agreements were void as unlicensed corporate practice. OCA entered bankruptcy in 2006. The resulting cases still influence DSO contract drafting. See How DSOs grew for the business history.

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Orthodontic Affiliates, P.C. v. OrthAlliance, Inc.: a different result

Citation: 210 F. Supp. 2d 1054 (N.D. Ind. 2002) · Opinion Holding: The court upheld an OrthAlliance service agreement against an illegality challenge. Indiana voids a contract on public-policy grounds only where the violation is “substantially free from doubt,” and Indiana’s act did not define the practice of dentistry to include owning or operating an office that employs a dentist. Why it matters: A national form agreement that failed in Texas survived in Indiana because the statutes differed and the court considered the benefit the departing party had already received. The OCA decisions do not establish a nationwide rule that management agreements are void. Each agreement must be tested against the applicable state’s practice act.

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Penny v. OrthAlliance, Inc.

Citation: 255 F. Supp. 2d 579 (N.D. Tex. 2003) · Opinion Facts: OrthAlliance bought Texas orthodontists’ practice assets, ran the offices under service agreements, and bound the orthodontists through employment agreements with noncompetes. Holding: In a case of first impression, the interlocking agreements violated Tex. Occ. Code §§ 251.003(a)(4) and 256.001 and were illegal in their entirety. The asset purchases transferred the offices, the service agreements had the company operating them, and the employment agreements had it engaging the dentists. Taken together, those acts met the statute’s definition of practicing dentistry. Why it matters: A Texas example of reading a combination of agreements together rather than isolating each clause. Additional Texas federal decisions followed Penny.4 Use the current Texas statute and the actual asset, employment, service, and control facts; the opinion does not dictate the allocation in another state.

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Mason v. Orthodontic Centers of Colorado, Inc.

Citation: 516 F. Supp. 2d 1205 (D. Colo. 2007) · Citation record What it is: This is the reported Colorado case from the OCA/OrthAlliance disputes. Contemporaneous reporting identifies Colorado as one of the states in which a court declared the agreements void under the dental practice act.5 Colorado has since recodified its dental act at Colo. Rev. Stat. tit. 12, art. 220, so the opinion’s statutory section numbers are superseded. Why it matters: With Texas and Washington, Colorado showed the wave was not a Texas quirk: the same agreements failed under differently worded acts, which is why national DSOs cannot run one template MSA across all states.

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In re OCA, Inc.

Citation: 552 F.3d 413 (5th Cir. 2008) · Opinion · Slip opinion (5th Cir.) Facts: In OCA’s bankruptcy, the debtor sued orthodontists to enforce its Business Services Agreements. OCA bought or leased the space and equipment, billed patients, hired non-dental staff, and controlled the operating bank account. The orthodontists could not withdraw their own funds. Some agreements lasted as long as forty years. Holding: Affirmed that the agreements were void for illegality. Corporations are “persons” under Tex. Occ. Code § 251.003(a)(4); the agreements let OCA practice dentistry without a license “by owning, maintaining, or operating a place of business in which OCA engaged someone else in the practice of dentistry.” The court refused severance because the illegal obligations formed the interlocking core of the deal, rather than incidental terms. The dentists “were essentially only left with control over diagnosing and treating their patients,” which was not enough. Why it matters: This is a leading modern appellate treatment of CPOD analysis.
  1. Control is aggregated. Courts consider the bank account, staff, facilities, term, exit restrictions, and other control rights together rather than evaluating each clause in isolation.
  2. Severability clauses will not save a structurally illegal MSA.
  3. Leaving the dentist only chairside decisions was insufficient. The court singled out bank-account control, which made the manager the effective owner of practice revenue. Revenue-account authority remains a common focus in MSA reviews. See Move money between DSO and PC.

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Packard v. OCA, Inc.

Citation: 624 F.3d 726 (5th Cir. 2010) · Official opinion Facts: After his 25-year agreement was held illegal, OCA tried to claw back nearly $$5 million it had paid the orthodontist on entry, on unjust-enrichment theories. Holding: The Fifth Circuit affirmed dismissal of the unjust-enrichment claim under the governing law and facts; OCA did not recover the payment through that claim. Why it matters: Packard shows that a party to an unlawful arrangement may also lose an equitable recovery theory. It does not establish that money is always unrecoverable in either direction; analyze the governing law, remedy, fault rules, statutory policy, severability, and specific claim.

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Modern private litigation

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Treiber v. Aspen Dental Management, Inc.

Citation: 94 F. Supp. 3d 352 (N.D.N.Y. 2015), aff’d, 635 F. App’x 1 (2d Cir. 2016) (summary order) · Opinion Facts: Eleven patients from eleven states sued Aspen Dental Management, its CEO, and its private equity owner, alleging the company’s control of hundreds of clinics violated CPOD laws in 22 states. Holding: Dismissed in its entirety; affirmed by non-precedential summary order. Why it matters: Private plaintiffs can fail on standing, causation, injury, or the elements of the asserted cause of action before a court reaches the corporate-practice merits. Treiber did not decide that every patient lacks a private claim or that the challenged structure complied with state law. See the enforcement tracker.

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Galkin v. SmileDirectClub, LLC

Citation: No. A-2867-19 (N.J. App. Div. June 11, 2021) (unpublished; nonprecedential under N.J. R. 1:36-3) · Official opinion Facts: Plaintiffs attacked a DSO’s succession agreement and management agreement as a “sham” giving the company unlawful control of a New Jersey dental practice. Holding: Summary judgment for the defendants was affirmed on the record before the panel. The court considered, among other facts, the licensed-dentist succession restriction and the management agreement’s express clinical-control carve-out, and distinguished the proofs in Allstate v. Northfield. Why it matters: It is a useful New Jersey issue-spotter for succession language and the difference between contractual rights and proof of actual lay ownership or clinical control. Because the opinion is unpublished and nonprecedential, it is not a statewide or national safe harbor, and paper carve-outs must match operations.

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Boards under antitrust supervision

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North Carolina State Board of Dental Examiners v. FTC

Citation: 574 U.S. 494 (2015) (Kennedy, J., 6–3) · Opinion Facts: Six of the North Carolina dental board’s eight members were practicing dentists elected by dentists. The board sent at least 47 cease-and-desist letters to non-dentist teeth-whitening providers, driving them from the market. Most complaints that prompted the campaign concerned the providers’ low prices rather than safety. The FTC charged an unfair method of competition, and the board claimed state-action immunity. Holding: A state licensing board controlled by active market participants in the occupation it regulates gets state-action antitrust immunity only if the challenged restraint reflects clearly articulated state policy and is actively supervised by the state. Active supervision requires substantive review, power to veto or modify, actual rather than potential supervision, and a supervisor who is not a market participant. The board’s letter campaign flunked. Why it matters: Practitioner-controlled dental boards can face Sherman Act claims when acting against competitive threats without substantive state review. The Court refused to immunize informal enforcement of the kind used against the teeth-whitening providers. The decision helps explain why some corporate-practice enforcement moved to attorneys general and why several states later created board-supervision procedures. Mississippi’s Occupational Board Compliance Act of 2017 is one example.6

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The SmileDirectClub cases

Citations: SmileDirectClub, LLC v. Battle, 4 F.4th 1274 (11th Cir. 2021) (en banc) (opinion); SmileDirectClub, LLC v. Tippins, 31 F.4th 1110 (9th Cir. 2022) (amended opinion) Facts: SmileDirectClub’s direct-to-consumer aligner model prompted two board responses: a Georgia rule requiring on-site dentist supervision of digital scans, and California investigations and coordinated inspections of SmileShops. SDC sued board members under the Sherman Act, invoking NC Dental. Holdings: In Battle, the en banc Eleventh Circuit held that a denial of state-action protection is not immediately appealable. The doctrine is a defense to liability, not an immunity from suit, so board members must litigate before testing it. In Tippins, the Ninth Circuit held that SDC stated a Sherman Act § 1 claim, rejecting “the broad proposition that regulatory board members and employees cannot form an anticompetitive conspiracy when acting within their regulatory authority.” Why it matters: The antitrust litigation did not validate SDC’s business model or invalidate a dental practice act. SDC won procedural and pleading-stage decisions, then filed Chapter 11 in September 2023 and announced its shutdown that December.7 The cases instead changed the risk analysis for boards. Unsupervised, informal campaigns against new business models can prompt antitrust litigation, and states increasingly address teledentistry through statutes and formally reviewed rules.

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What the cases collectively hold

  1. The unit of analysis is the whole arrangement. From Painless Parker (no division into business and professional “departments”) to In re OCA (interlocking obligations aggregated), courts read the contracts together and total the control.
  2. Recurring facts matter only through the governing rule: assets and offices (Penny), employment (Bailey Dental), revenue-account control (In re OCA), holding out (Winslow), fee terms, duration, and exit rights can carry different legal weight by state and deal.
  3. Contract and remedy risk is claim-specific: courts have refused enforcement, severance, covenants, or restitution in particular cases, while Hannon refused to let a corporation use its own lack of authority to escape patient liability.
  4. The governing state matters. The same form contract was void in Texas and valid in Indiana. A multi-state MSA therefore requires statute-by-statute review. See DSO laws by state.
  5. Boards are powerful but not unbounded. Semler validates the regulatory project; NC Dental polices its capture.

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Sources

  1. Central Kansas Medical Center v. Hatesohl, 425 P.3d 1253 (Kan. 2018). CourtListener.
  2. Painless Parker v. Board of Dental Examiners, 216 Cal. 285, 295–96 (1932), quoted in the California Medical Association’s amicus brief in Art Center Holdings v. WCE (Cal. Ct. App. 2025). Brief (PDF).
  3. California AG, settlement with Aspen Dental over corporate practice (May 7, 2026).
  4. Law Offices of Jeanine Lehman, Dental Legal Update: DSO court cases and ownership (Oct. 2015) (surveying the Texas decisions following Penny).
  5. Group Dentistry Now, Now and then: OrthAlliance vs. current DSO models; House Oversight Committee, Survey of State Laws Governing the Corporate Practice of Dentistry (2012).
  6. Miss. Code Ann. §§ 73-47-1 et seq. (Occupational Board Compliance Act). Statute; FTC, Staff guidance on active supervision of state regulatory boards (Oct. 2015).
  7. CNN, SmileDirectClub is shutting down (Dec. 2023); NY AG, $$4.8 million recovered for SmileDirectClub customers (2024).
Last modified on August 21, 2026