California’s New AOB Law Changes the Out-of-Network Dental Equation

California has enacted a change that dental practices and DSOs should factor into their payer strategy before 2027.

On September 27, Gov. Gavin Newsom approved AB 1629, which requires dental plans and insurers to pay a noncontracting dental provider directly for covered services when the provider submits a valid patient assignment of benefits. The law takes effect January 1, 2027.

The practical significance is straightforward: an out-of-network practice that accepts assignment of benefits will no longer necessarily have to collect the full treatment amount from the patient upfront and leave the patient to seek reimbursement from the plan.

That does not make going out of network automatically more attractive. But it removes one source of friction that has historically mattered in the economics of an out-of-network strategy.

What AB 1629 actually changes

Under the enacted bill, a noncontracting dental provider can obtain a patient's signed and dated consent to an assignment of benefits. When that assignment is submitted, the dental plan or insurer must pay the provider directly for covered services according to the patient's benefit.

The law also places requirements on the provider.

Before obtaining the assignment, the provider must disclose that:

• The provider is noncontracting with the patient's dental plan.
• The patient may have lower out-of-pocket costs with an in-network provider.
• The practice's estimated treatment cost and the patient's estimated share.
• Plan benefits may not apply to the treatment.
• The patient can confirm benefits with the plan before beginning treatment.
• Assignment of benefits is optional and can be revoked for services not yet rendered.

The statute also limits what the practice can collect before the plan pays. A provider accepting assignment cannot charge more than an estimate of the patient's cost sharing or a deposit approximating that cost share before insurer payment.

For practices, that means AOB is not simply a new payment-routing option. It also creates a workflow around consent, disclosures, estimates and documentation.

Why this matters to the out-of-network calculation

One of the biggest operational barriers to leaving a PPO network is patient cash flow.

Imagine a patient receives a $2,000 procedure and has out-of-network benefits. If the practice must collect the entire $2,000 at the time of service and the patient then waits for reimbursement, the patient effectively finances the insurer's portion of the claim.

That can affect treatment acceptance even when the patient's plan technically covers out-of-network care.

Beginning in 2027, a California practice that accepts assignment can instead collect an estimate of the patient's share and receive the covered insurance payment directly from the plan.

That changes one variable in the network participation equation.

It does not eliminate the other variables. Out-of-network reimbursement may still differ from contracted reimbursement. Patients may face higher coinsurance or other cost exposure. A practice may still need to collect amounts not paid by the plan. And patient behavior will vary by market.

The more useful question for operators is not whether AB 1629 makes out-of-network dentistry "better." It is whether removing the full-upfront-payment requirement materially changes the economics in a particular market.

The DSO implication: model this market by market

For a multi-site dental group, a payer contract should not necessarily have the same value everywhere.

A network relationship can look very different based on:

• Contracted fee levels
• Out-of-network reimbursement
• Payer concentration
• Local network density
• Patient mix
• Competitive alternatives
• Treatment mix
• Expected patient cost sharing

AB 1629 adds another factor: how much patient friction was being created by the previous payment flow.

A California DSO evaluating a payer relationship now has a reason to model what happens if the group becomes nonparticipating while still accepting assignment of benefits.

That analysis should include both reimbursement and patient behavior. A higher nominal out-of-network reimbursement means little if patient cost exposure drives treatment acceptance down. Conversely, a low contracted fee may be less defensible if the group's patients can continue to use benefits without financing the entire claim upfront.

Network adequacy reporting is the second half of the law

AB 1629 also changes network reporting.

The law requires dental plans and insurers to provide regulators with broader network information, including data intended to reflect the full population using provider networks.

The California Dental Association notes that nearly half of Californians with commercial dental coverage are in self-insured, administrative-services-only or similar arrangements that historically were not fully reflected in the state's network-adequacy assessments, even though many use overlapping provider networks.

The legislation is intended to give the California Department of Managed Health Care and Department of Insurance a more complete view of how those networks are being used.

For operators, the important point is that a published provider count does not necessarily tell you the actual capacity or competitive value of a dental network. More complete utilization and network reporting could eventually make network adequacy—and network leverage—easier to evaluate.

What California practices should do before January 2027

Practices do not need to make a network decision today. They do need to prepare for a different operating environment.

The highest-value work over the next year is likely to be:

Model payer economics. Compare current contracted reimbursement with realistic out-of-network reimbursement by market and procedure mix.

Measure payer concentration. Know which plans actually drive patients and production at each location.

Build the AOB workflow. Consent, disclosures, treatment-cost estimates and document retention will need to be operationalized consistently.

Model patient responsibility. Evaluate the patient's expected cost—not just what the insurer pays.

Revisit weak contracts. AOB does not eliminate the value of PPO participation, but it may change the leverage calculation for contracts with materially below-market reimbursement.

The bigger takeaway

Dental payer strategy is becoming increasingly market-specific.

The question is no longer simply:

"Are we in network or out of network?"

A more useful framework is:

What economic value does this network relationship create at this location, for this patient population, at these reimbursement levels?

California's AB 1629 changes one component of that calculation by allowing assigned benefits to flow directly to noncontracting dental providers.

For practices and DSOs already evaluating network participation, reimbursement and payer concentration, that is worth incorporating into the model now—before the law takes effect on January 1, 2027.

Sources

• California Legislative Information — AB 1629
• California Dental Association — Governor signs CDA-sponsored bill on assignment of benefits, network adequacy standards