Carbon Health: California AG Sends Another Warning Shot on MSO-PC Enforcement

Summary:

• Development: On June 26, 2026, California Attorney General Rob Bonta announced a settlement with Carbon Health Technologies, Inc., its affiliated medical groups, and co-founder and former CEO, resolving allegations that Carbon Health violated California’s corporate practice of medicine doctrine, used misleading advertising, and engaged in improper patient and payer billing practices. The settlement remains subject to court approval and was entered without any admission of liability or wrongdoing.
• Settlement Terms: The proposed settlement includes $4.4 million in civil penalties against the Carbon Health entity defendants and a separate $100,000 civil penalty against the former CEO personally. It also includes broad injunctive relief targeting corporate structure, management authority, billing practices, patient contracts, and insurance-related advertising.
• Why it matters: The Attorney General has framed the settlement as a first-of-its-kind medical CPOM resolution. More importantly for healthcare operators, it follows the AG’s Art Center amicus and Aspen Dental settlement, reinforcing a broader California trend: regulators are looking beyond nominal professional ownership and asking whether MSOs, investors, founders, or management companies actually control the practice.
• Action Point: Healthcare organizations using MSO-PC structures should document actual physician-owner control and review option rights, financing arrangements, MSO authority, advertising controls, and patient-billing practices for CPOM and consumer-protection risk.

Background: Carbon Health’s Growth and the AG’s Theory of Control

The California Attorney General’s proposed settlement with Carbon Health is the latest signal that California is taking a more aggressive and operational view of corporate practice of medicine compliance. Founded in the Bay Area in 2015, Carbon Health grew with substantial venture backing into a multi-state urgent and primary care platform. The Attorney General’s complaint alleges that the company’s MSO-PC structure, financing arrangements, option rights, advertising controls, payer contracting activity, and billing practices crossed the line from administrative support into impermissible control.

The settlement matters not because it ends the friendly-PC model in California (which it does not), but because it identifies the kinds of contractual, financial, and operational controls California is increasingly willing to challenge. For MSOs, professional corporations, investors, founders, and physician-owners, the practical question is no longer whether the documents say the PC is professionally controlled. The question is whether that control is real, documented, and reflected in day-to-day operations.

The “Friendly PC” Structure at the Center of the Case

Carbon Health used the popular friendly PC/MSO structure: professional corporations provided clinical services, while Carbon Health Technologies served as the management company. The AG did not challenge the existence of an MSO-PC model in the abstract. Instead, the complaint focused on the degree of control allegedly retained by the MSO, including authority over advertising, payer negotiations, medical equipment, and the hiring, firing, and compensation of licensed clinicians. The AG also focused on option and financing arrangements that allegedly made the professional corporations “captive” to the MSO. Among the features that the AG called attention to were:

• Total operational control. The MSO held “complete authority” over advertising, payor negotiations, selection of medical equipment, and the hiring, firing, and compensation of licensed clinicians.
• Captive ownership via an option. An assignable option let the MSO force the physician-shareholder to transfer the practice to a physician of the MSO’s choosing upon termination, breach, or at the MSO’s sole discretion, while the physician could not replace the MSO without risking loss of the practice.
• Financial leverage. A revolving credit arrangement required the professional corporations to borrow exclusively from the MSO at above-market rates, secured by a first-priority lien and a security interest in the physician’s shares.

The result, the People alleged, was a “captive professional corporation” whose existence and ownership depended entirely on the unlicensed corporate parent with non-physician executives directing staffing, advertising, and insurance negotiations.

Three Buckets of Alleged Misconduct

1. MSO Control and CPOM Risk: The CPOM allegations centered on whether the MSO structure preserved genuine physician control. The complaint alleged that Carbon Health Technologies retained broad authority over practice operations and used option, transfer, and financing mechanisms that allowed it to influence or replace the physician-owner. The proposed judgment responds directly to those issues by enjoining MSO arrangements that give the management company complete authority over advertising, payer negotiations, equipment selection, and licensed-clinician hiring, firing, and compensation.
2. Network Status Advertising: The advertising allegations focused on insurance and network-status representations. The AG alleged that Carbon Health represented that it accepted major insurance or that patients would pay in-network rates, even where particular clinics or services were out-of-network. The complaint’s most detailed example involved Anthem negotiations, where the AG alleged Carbon Health used a $500 urgent-care billing code and patient-facing communications in ways that misled patients and increased pressure on the payer.
3. Patient Billing and Auto-Charge Practices: The billing allegations are independently important because they have nothing to do with CPOM structure. The AG alleged that Carbon Health buried auto-charge language in patient consents, charged cards with insufficient notice, reversed prior write-offs, and failed to maintain adequate processes for patients to resolve billing disputes. The proposed judgment enjoins a range of improper billing practices, including charging HMO patients more than permitted cost-sharing, collecting sums not owed, making unauthorized debit-card or credit-card charges, using incorrect billing codes, and misrepresenting network status.

What the Settlement Requires

• Injunctive Relief: Restructure and Reform: The proposed judgment does not provide a universal blueprint for all compliant MSO-PC structures, but it does identify a set of practices California is prepared to prohibit through injunctive relief. Those include MSO control over advertising, payer negotiations, equipment selection, and licensed-clinician hiring, firing, and compensation; assignable option arrangements giving the MSO an ownership interest or practical replacement right; and exclusive above-market financing arrangements that reinforce MSO leverage over the PCs. Carbon Health must revise patient contracts to remove unclear and auto-charge terms and ensure patients can reach customer service to resolve billing disputes.
• Monetary Relief: The settlement imposes $4.4 million in civil penalties on the Carbon Health entities, structured in their Chapter 11 cases as a $4,025,000 general unsecured claim plus a $375,000 administrative expense claim, and a separate $100,000 penalty against Mr. Bali personally, for a combined $4.5 million. Notably, Carbon Health had filed for Chapter 11 in the Southern District of Texas during the investigation. Its bankruptcy plan was confirmed by the Court on May 29, 2026 and made effective June 15, 2026 in the Southern District of Texas (In re Carbon Health Technologies, Inc., Bankr. S.D. Tex. No. 26‑90306(CML)), yet neither the company nor its co-founder escaped penalties or injunctive obligations.
• Pay Attention to the Carve-Outs: The release is narrow. It does not resolve potential liability to California’s Medicaid program, and it expressly preserves claims that payers or consumers may bring. For platforms, PCs, and investors, that means the settlement may resolve one enforcement track without eliminating payer, consumer, or government-program exposure.

Why This Matters: A Pattern, Not a One-Off

The Carbon Health settlement should not be read in isolation. It follows the AG’s April 2026 Art Center amicus challenging succession rights in MSO-PC arrangements and the May 2026 Aspen Dental settlement addressing DSO control, advertising, and practice-owner independence. The throughline is clear: California is increasingly focused on whether professional ownership is meaningful in practice, or whether contract rights, financing arrangements, brand control, staffing authority, and billing systems shift practical control to the management company. This case extends the Aspen Dental issues to medicine, with penalties roughly 2.2 times larger and, significantly, individual liability for a founder-CEO. The two matters share a structural DNA worth comparing side by side:

The key lesson: California is treating the contract terms themselves as the violations, including  assignable options, share-transfer-on-termination triggers, MSO control over clinical staffing and compensation, exclusive above-market financing. For the many VC- and PE-backed platforms built on the friendly-PC and DSO models, the enjoined provisions function as a de facto compliance checklist.

Key Takeaways and Action Items: MSOs, PCs, Investors, and Founders

1. Do not treat friendly-PC compliance as a paper exercise. California is looking at whether licensed professionals have actual, documented control over the practice. not just whether the documents recite that they do.
2. Review succession, option, and replacement rights. Provisions that allow an MSO to replace the physician-owner or force a transfer of ownership remain a central regulatory concern.
3. Reassess MSO authority over operational decisions. Advertising, payer contracting, equipment selection, clinician hiring/firing, compensation, billing, and patient communications should be reviewed carefully to confirm that the MSO is supporting the practice rather than controlling it.
4. Financing arrangements can create CPOM risk. Exclusive credit arrangements, above-market intercompany loans, liens on PC assets, and security interests in professional shares may be viewed as instruments of control, not just ordinary financing tools.
5. Billing and advertising are separate enforcement pathways. Even if the ownership structure can be defended, misleading network-status representations, unclear auto-charge terms, insufficient billing notice, and weak customer-service processes can create independent UCL, FAL, consumer-protection, payer, and government-program risk.
6. Settlements may not buy complete peace. The Carbon Health proposed judgment preserves potential Medicaid, payer, and consumer claims. A regulatory settlement can resolve one government action while leaving other exposure alive.
7. Founders and executives should not assume the corporate form is enough. The separate $100,000 penalty against Bali is a reminder that California may look to individuals where it believes they were central to the structure or conduct at issue.

California is not saying that every MSO-PC model is unlawful. But Carbon Health, Aspen Dental, Art Center, SB 351, and AB 1415 all point in the same direction: the state is asking whether professional independence is real in practice. Organizations operating in California should review not only their governing documents, but also their actual workflows, approvals, financing arrangements, billing practices, advertising controls, and clinician-owner decision rights.

Leech Tishman has extensive experience advising healthcare organizations, MSOs, and investors on regulatory compliance and enforcement risk. Our team is prepared to help clients evaluate how the Carbon Health settlement may affect their organization’s MSO-PC structure, billing practices, advertising, transaction planning, or broader California CPOM risk. For assistance or additional information, please contact Tara A. Davidoff at tdavidoff@leechtishman.com or Harry J. Nelson at hnelson@leechtishman.com, Partners in Leech Tishman’s Healthcare Practice Group.