How Parity Rule Changes Are Reshaping Out of Network Practice

What Parity Law Covers and What It Leaves Alone

The federal mental health parity law, first passed as the Mental Health Parity and Addiction Equity Act, changed how group health plans must cover mental health services. The law says that mental health and substance use disorder benefits cannot be more restrictive than medical and surgical benefits. That means limits on visits, copays, deductibles, and prior authorization must be in line with what a plan uses for other health care.

However, parity law does not require plans to cover mental health services at all. If a plan does not cover out of network care for surgery, it does not have to cover out of network therapy. Parity only applies if the plan already covers both types of care. The law also applies mainly to employer-sponsored plans and some individual policies. Small employer plans and "excepted benefit" plans, like short-term coverage, often remain outside its reach.

Parity law also does not set rates. Insurers can pay out of network providers whatever the plan documents say, so long as their methods are comparable to those used for out of network medical care. This leaves a wide range of reimbursement and paperwork rules in place, which means clinicians in private practice still see big variation from one plan to the next.

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Nonquantitative Treatment Limitations in Plain Terms

Nonquantitative treatment limitations, called NQTLs in the rulebooks, cover all the ways a plan can limit care without using a simple number. These include medical necessity reviews, step therapy, provider credentialing, and network admission requirements. Parity means these processes must be used no more restrictively for mental health than for medical care.

How NQTLs Affect Out of Network Payments

If a plan requires preauthorization for a certain mental health service, it must use roughly the same approach for comparable medical services. For example, if an insurer asks for detailed progress notes for continued therapy but does not ask for them for follow-up primary care visits, that could violate parity. The same applies to how plans approve or deny claims, set reimbursement formulas, or require documentation for out of network services.

Plans must document their NQTL processes and, if challenged, show that mental health care is not being singled out for extra hurdles. Recent federal guidance has required plans to compare their policies on paper, and regulators are asking for this documentation more often.

Limits That Still Stand

Not all limits fall under parity review. For example, a plan can keep a closed network if it does the same for other types of care. Insurers can still exclude types of therapy not commonly accepted in medical practice. And while parity curbs discriminatory benefit design, it does not guarantee higher pay or easier access for any out of network provider.

Network Adequacy, Ghost Networks, and Out of Network Use

Parity law now reaches into network adequacy. Network adequacy means there are enough in-network providers for members to actually access care. If networks are too thin, patients must turn to out of network therapists, and new rules say that plans cannot build networks so limited that they effectively block access to mental health.

The Ghost Network Problem

Many therapists have heard from clients who call dozens of "in-network" providers, only to find none accepting new patients, or the listings are out of date. These so-called "ghost networks" have drawn attention from both federal and state regulators, who now require insurers to update directories and prove they have real capacity.

When ghost networks force a client to go out of network, plans may be required to cover those visits at in-network rates, especially if they cannot offer a timely appointment with an in-network provider. Some states have set standards for appointment wait times, and the federal government is pressing for more regular audits. Still, enforcement varies, and many clients and therapists must navigate confusing appeals or exceptions processes.

How This Changes Out of Network Practice

Therapists in private practice often serve clients who have out of network benefits because in-network options are full or inaccessible. Under parity, plans cannot set up networks in a way that keeps mental health out of reach for most members. However, insurers still try to limit out of network use by using reimbursement formulas or requiring extra paperwork. Some plans have responded with narrow networks and more burdensome claims processes, making the path to payment longer for both client and provider.

Keep reading: How to Calculate What a Client Gets Back on a Superbill

Comparing Behavioral and Medical Reimbursement Inside One Plan

A central test of parity is whether mental health reimbursement rules match those for medical care in the same plan. This includes both in-network and out of network coverage. If a plan uses "usual and customary" charges to pay out of network surgeons, it must use a similar formula for therapists.

Deductibles, Coinsurance, and Out of Pocket Maximums

Parity covers cost-sharing. Plans cannot set a higher deductible or coinsurance rate for out of network therapy than for comparable out of network medical visits. If a plan pays 60 percent of the allowed charge for out of network medical care, it must pay the same rate for mental health services, using the same calculation.

However, plans are allowed to use different reimbursement schedules for out of network care than for in-network care. Many plans set allowed charges for therapy lower than the actual fees charged by providers. The same is often true for out of network medical specialists. This means clients may still face high balances for out of network mental health care, even if the processes are technically in parity.

Payer Audits and Documentation

Insurers often audit out of network claims more aggressively for mental health. Some require detailed notes or extra forms. Parity rules say that if this is not the case for medical claims, the policy may be out of compliance. Still, enforcement depends on provider and client complaints, and many therapists report that mental health claims face more scrutiny in practice.

What Enforcement Looks Like at the State Level

States play a major role in enforcing mental health parity, especially for fully insured plans regulated at the state level. State insurance departments receive complaints, audit plan documents, and can fine insurers or require them to change their policies.

Common Enforcement Practices

Some states require insurers to submit annual parity compliance reports. Others conduct "market conduct exams," which audit plan records for patterns of denied claims or barriers to mental health access. A few states have issued fines for plans that maintain ghost networks or use more restrictive preauthorization for therapy.

State agencies can also help clients appeal denied out of network claims. Many states publish guides for consumers and providers explaining how to file parity complaints or request external review. The process can be slow, and outcomes vary, but providers who understand their rights under parity law are more likely to succeed in these appeals.

Variation from State to State

Enforcement is inconsistent. Some states devote more staff and resources to parity investigations, while others act mainly on consumer complaints. Multi-state insurers may apply the strictest rule across their plans, or they may tailor benefit designs to each state's requirements. For clinicians in private practice, it pays to know the specific rules in the states where they practice.

See how SuperbillDesk handles this for mental health

What the Rules Do Not Do for a Private Pay Practice

Parity law does not require insurance coverage for every mental health service. If a client's plan excludes a type of therapy, parity does not force the plan to cover it. Parity also does not set minimum reimbursement rates for out of network providers. Insurers can pay the lower of the provider's charge or a set "usual and customary" rate, which may be based on outdated fee schedules.

The law does not guarantee prompt claim processing. Insurers can still delay payment or request repeated documentation, as long as they use similar requirements for medical claims. Many therapists face long waits for reimbursement, especially for out of network clients.

Importantly, parity law does not require plans to include every provider in their network, even if the network is technically adequate. Plans can still set credentialing standards, panel limits, or closed networks, which leaves many private pay therapists working outside the insurance system by necessity.

For cash pay practices, parity only comes into play when clients seek to use out of network benefits. Even then, clients may be responsible for the difference between the provider's fee and the insurer's allowed amount. This "balance billing" is still allowed unless state law says otherwise.

Positioning Your Fees and Your Paperwork for What Comes Next

Therapists and counselors who work out of network need to pay attention to how parity rules are evolving. With new federal guidance and ongoing state investigations, plans are under greater pressure to show they treat mental health claims fairly. Providers who understand the rules can advocate for themselves and their clients when claims are denied or paid incorrectly.

Review your out of network fee schedule and compare it to what plans pay for both mental health and comparable medical services. Be ready to ask for plan documents, including the plan's parity analysis, when there are repeated problems with reimbursement or network access. Encourage clients to file appeals when appropriate, and keep clear records of communications with insurers.

Accurate, timely superbills make a difference. Payers increasingly require detailed documentation, including CPT and diagnosis codes that match the claim. Plans may reject or delay claims that are missing information or use outdated codes. A reliable system for generating superbills each month can reduce errors and help clients get reimbursed faster.

As parity enforcement expands, practices that keep up with paperwork requirements and use tools that automate superbill generation are positioned to adapt smoothly, even as payment rules and documentation standards change.