Key Takeaways
- The Mental Health Parity and Addiction Equity Act requires insurance plans to cover mental health and substance use disorder treatment at the same level as medical and surgical benefits.
- Parity applies to financial requirements like deductibles, copays, and coinsurance, as well as treatment limitations like visit caps and prior authorization requirements.
- California SB 855 strengthens federal parity protections by requiring insurers to cover all recognized mental health and substance use disorders using evidence-based clinical criteria.
- If your insurer violates parity requirements, you can file complaints with the California Department of Managed Health Care, the Department of Insurance, or the U.S. Department of Labor.
Understanding the Parity Act and Addiction Coverage
The Mental Health Parity and Addiction Equity Act, commonly called the Parity Act or MHPAEA, is a federal law that fundamentally changed how insurance companies cover addiction treatment. Signed into law in 2008, the Parity Act requires that health insurance plans offering mental health and substance use disorder benefits provide coverage that is no more restrictive than coverage for medical and surgical conditions.
Before the Parity Act, insurance companies routinely imposed discriminatory limitations on addiction treatment that had no parallel in medical coverage. Lifetime visit caps, annual dollar limits, higher copayments for behavioral health services, and restrictive prior authorization requirements were standard practice. These barriers left millions of Americans unable to access the addiction treatment they needed.
Today, the Parity Act ensures a level playing field. If your insurance plan covers medical conditions without annual visit limits, it cannot impose visit limits on addiction treatment. If your plan requires a $30 copay for a specialist medical visit, it cannot charge a higher copay for an outpatient addiction treatment session. This principle of equity applies across all aspects of insurance coverage in Southern California and nationwide.
The Parity Act does not require insurance plans to cover mental health or substance use disorder services. However, if a plan offers these benefits, they must be provided at parity with medical and surgical benefits. The ACA separately requires most plans to include substance abuse coverage as an essential health benefit.
What the Parity Act Requires
The Parity Act addresses two categories of insurance requirements: financial requirements and treatment limitations. Understanding both categories helps you identify when your insurer may be violating the law and empowers you to advocate for your rights as you seek addiction treatment.
Financial Requirements Under Parity
Financial requirements include deductibles, copayments, coinsurance, and out-of-pocket maximums. Under the Parity Act, these financial requirements for mental health and substance use disorder benefits cannot be more restrictive than the predominant financial requirements applied to substantially all medical and surgical benefits in the same classification.
For example, if your plan charges 20 percent coinsurance for the majority of in-network medical services, it cannot charge 40 percent coinsurance for in-network addiction treatment. Similarly, if your plan has a $2,000 annual deductible for medical services and a separate $4,000 deductible for behavioral health services, the separate and higher behavioral health deductible likely violates parity requirements.
Quantitative Treatment Limitations
Quantitative treatment limitations are numerical restrictions on the scope or duration of benefits, such as annual visit limits, day limits for inpatient care, or dollar caps on coverage. The Parity Act prohibits plans from applying more restrictive quantitative limitations to substance use disorder treatment than those applied to medical and surgical benefits.
If your medical plan has no annual limit on the number of physical therapy visits, for example, it cannot impose a 30-visit annual limit on outpatient addiction treatment sessions. This comparison must be done within each classification of benefits, such as inpatient, outpatient, and emergency services, to ensure true equity.
Non-Quantitative Treatment Limitations
Non-quantitative treatment limitations are less obvious but equally important. These include prior authorization requirements, medical necessity criteria, step therapy or fail-first protocols, network admission standards, and reimbursement rates. The Parity Act requires that these limitations be applied no more stringently to addiction treatment than to medical and surgical benefits.
For instance, if your insurer does not require prior authorization for inpatient surgical procedures but does require prior authorization for inpatient addiction treatment, this discrepancy may constitute a parity violation. The 2024 final rule from the Department of Labor strengthened enforcement of non-quantitative treatment limitation parity, requiring plans to demonstrate compliance through data analysis.
California Strengthens Parity Protections with SB 855
California has gone beyond federal parity requirements to provide even stronger protections for individuals seeking addiction treatment. Senate Bill 855, signed by Governor Newsom in 2020, is considered one of the most comprehensive behavioral health coverage laws in the nation. The law closes loopholes that insurers have used to circumvent federal parity requirements.
SB 855 requires California-regulated health plans and insurers to provide coverage for the diagnosis and medically necessary treatment of all mental health and substance use disorders recognized in the current DSM and ICD. This eliminates the ability of insurers to cover some diagnoses while excluding others. It also requires that medical necessity determinations be based on clinical criteria developed by nonprofit professional associations.
The law specifically mandates that insurers use criteria consistent with generally accepted standards of care, including ASAM criteria for substance use disorders, when making coverage decisions. This provision prevents insurers from applying proprietary, more restrictive criteria that effectively deny necessary treatment. For Orange County residents, SB 855 provides a powerful tool for challenging inappropriate coverage denials.
If your insurer denies addiction treatment coverage, request a copy of the specific clinical criteria they used to make the determination. Under SB 855, California insurers must use recognized criteria like ASAM guidelines, not proprietary standards. If they used different criteria, the denial may be unlawful.
Common Parity Violations in Addiction Treatment
Despite the clear requirements of federal and state parity laws, violations remain widespread in the insurance industry. A 2023 report from the U.S. Department of Labor found that many health plans continue to apply more restrictive non-quantitative treatment limitations to behavioral health benefits than to medical benefits. Recognizing these common violations helps you identify when your rights are being compromised.
- Requiring prior authorization for residential addiction treatment while not requiring it for comparable medical admissions.
- Imposing more frequent concurrent review or continued stay reviews for substance abuse treatment than for medical hospitalizations of similar duration.
- Applying stricter medical necessity criteria for addiction treatment than for medical conditions with comparable treatment costs and durations.
- Setting lower reimbursement rates for behavioral health providers compared to medical providers with similar training and credentials.
- Requiring step therapy or fail-first protocols that mandate lower levels of addiction treatment before authorizing clinically indicated residential care.
- Using narrower provider networks for behavioral health than for medical and surgical specialties.
How Insurers Circumvent Parity Requirements
Some insurers use sophisticated strategies to limit addiction treatment coverage while technically complying with the letter of the law. These strategies include setting artificially low allowed amounts for substance use disorder services, using proprietary medical necessity criteria that are more restrictive than industry standards, and creating burdensome administrative processes that discourage treatment providers from seeking authorization.
Another common tactic is maintaining inadequate behavioral health provider networks while offering robust medical networks. This forces members to seek out-of-network care for addiction treatment at higher cost, effectively creating a financial barrier that does not exist for medical services. California regulators have increasingly scrutinized these practices and imposed penalties on non-compliant plans.
How to Enforce Your Parity Rights
When you believe your insurer is violating parity requirements, several enforcement mechanisms are available to you. Taking action not only protects your own access to treatment but also helps ensure that insurers comply with the law for all enrollees seeking addiction treatment.
- 1Request your insurer's comparative analysis showing how they apply treatment limitations to mental health and substance use disorder benefits versus medical benefits.
- 2File an internal appeal if your claim is denied, specifically citing parity requirements and any applicable California law such as SB 855.
- 3If the internal appeal is denied, file a complaint with the California Department of Managed Health Care (for HMO plans) or the California Department of Insurance (for PPO plans).
- 4Request an Independent Medical Review through the California Department of Managed Health Care, which is free and binding on the insurer.
- 5For employer-sponsored plans subject to ERISA, file a complaint with the U.S. Department of Labor's Employee Benefits Security Administration.
- 6Consult with a healthcare attorney specializing in insurance law if you believe your insurer is engaging in a pattern of parity violations.
Under the 2024 final parity rule, health plans are required to provide comparative analyses of their non-quantitative treatment limitations upon request from regulators. You can also request this information and use it to support your complaint if you believe parity is being violated.
Recent Parity Act Enforcement and Updates
Federal and state enforcement of parity requirements has intensified in recent years. The Consolidated Appropriations Act of 2021 strengthened parity enforcement by requiring health plans to conduct and document comparative analyses of their non-quantitative treatment limitations. Plans that fail to demonstrate compliance face penalties and corrective action requirements.
The Department of Labor's 2024 final rule further tightened parity regulations by requiring plans to use relevant data and evidence to demonstrate that non-quantitative treatment limitations are applied equally to behavioral health and medical benefits. Plans must also ensure that the factors used to design these limitations are based on objective, evidence-based criteria rather than subjective judgments that could introduce discriminatory outcomes.
In California, the Department of Managed Health Care has conducted targeted enforcement actions against health plans that violate parity and SB 855 requirements. Several major insurers have faced fines and corrective action plans for applying more restrictive medical necessity criteria to substance use disorder treatment than to comparable medical conditions. These enforcement actions benefit all consumers seeking addiction treatment in the state.
Using Parity Protections to Access Treatment in Orange County
Understanding your parity rights empowers you to access the addiction treatment you need and deserve. Whether you are seeking detox, residential treatment, or outpatient care in Orange County, the Parity Act and California SB 855 ensure that your insurer cannot treat your substance use disorder as less worthy of coverage than any other medical condition.
At Trust SoCal in Fountain Valley, our admissions and utilization review teams are well-versed in parity law and advocate aggressively on behalf of our clients. When insurers impose inappropriate limitations on coverage, we challenge those decisions using the full weight of federal and state parity protections. Our goal is to ensure that financial barriers never prevent our clients from receiving the care they need.
If you have questions about your insurance coverage or believe your parity rights have been violated, contact Trust SoCal at (949) 280-8360. Our team will review your situation, explain your rights, and help you develop a strategy for accessing treatment in Southern California.

Madeline Villarreal, Counselor
Counselor




