The Knox-Keene Health Care Service Plan Act of 1975 is the California law that licenses and regulates health care service plans through the Department of Managed Health Care (DMHC). If your coverage falls under it, the Act guarantees a defined set of benefits, timely appointments, protections against surprise bills, a formal grievance process, and access to a free Independent Medical Review when your plan denies care.
Which Plans It Covers
The DMHC regulates all HMOs in California, along with certain PPO products such as those offered by Blue Shield and Anthem Blue Cross. It also oversees specialized plans, including stand-alone dental and vision coverage. Traditional indemnity insurance and most other PPO products are regulated instead by the California Department of Insurance. If you are not sure which agency oversees your coverage, check the Evidence of Coverage document or your member ID card.
A larger gap involves self-funded employer plans. Under the federal Employee Retirement Income Security Act, ERISA preempts state laws that “relate to” employer-sponsored benefit plans, and its “deemer clause” bars states from treating self-funded plans as insurance.1Office of the Law Revision Counsel. 29 U.S. Code 1144 – Other Laws If your employer sets aside its own money to pay claims rather than buying coverage from a licensed health plan, Knox-Keene’s mandates and consumer protections do not apply, and you cannot file a DMHC complaint or use the state’s Independent Medical Review process. Large employers frequently self-fund, so a sizable share of California workers fall outside the Act. Those workers still have federal protections under ERISA and the Affordable Care Act.
What Your Plan Must Cover
The Act defines a set of “basic health care services” every full-service plan must include: physician services and referrals, hospital inpatient and outpatient care, laboratory and radiology services, and preventive care.2California Department of Managed Health Care. California Knox-Keene Health Care Service Plan Act and Regulations Plans that cover outpatient prescriptions must include all medically necessary drugs, even ones off the formulary when a doctor determines they are needed.
On top of that, California plans must provide the ten categories of essential health benefits required by the Affordable Care Act, adding maternity and newborn care, mental health and substance use disorder treatment, rehabilitative and habilitative services, and pediatric dental and vision care.3eCFR. Subpart B Essential Health Benefits Package Lifetime and annual dollar limits on essential health benefits are prohibited, and plans cannot deny coverage or charge more because of a pre-existing condition.
Mental Health and Substance Use
Federal parity law requires that financial limits and treatment restrictions on mental health and substance use disorder benefits be no more burdensome than those applied to medical and surgical benefits in the same coverage category.4Federal Register. Requirements Related to the Mental Health Parity and Addiction Equity Act For plan years beginning on or after January 1, 2026, plans must also show that nonquantitative limits like prior authorization and step therapy do not restrict access to behavioral health care more than comparable medical care, using outcome data rather than policy language.
California adds more. SB 855, signed in 2020, requires Knox-Keene plans to cover all medically necessary treatment for mental health conditions and substance use disorders under generally accepted standards of care, applying clinical criteria from nonprofit professional associations rather than internal plan guidelines. The law closed a gap where some plans limited coverage to only “severe” diagnoses.
Emergency Services
Plans must cover emergency care without prior authorization, whether or not the hospital or physician is in the network. Coverage applies the “prudent layperson” standard: if a reasonable person with average medical knowledge would believe the symptoms are a serious threat, the plan must pay. You are responsible only for your normal in-network cost-sharing, even at an out-of-network emergency room.
Timely Access to Appointments
Knox-Keene plans must ensure their networks can offer appointments within specific timeframes.5Department of Managed Health Care (DMHC). Timely Access to Care Fact Sheet
- Primary care: within 10 business days
- Specialist care: within 15 business days
- Mental health and substance use disorder care: within 10 business days
- Urgent care not requiring prior authorization: within 48 hours
- Urgent care requiring prior authorization: within 96 hours
A qualified provider can extend these timeframes if the delay will not harm the patient. Plans must also offer language assistance and disability accommodations so the standards are meaningful for every enrollee.
Protections While You Are Enrolled
Evidence of Coverage
Every plan must give you an Evidence of Coverage document describing benefits, exclusions, cost-sharing, and member rights. The DMHC has been rolling out standardized templates, beginning with large group plans, so members can more easily compare plans, and plans must use the DMHC’s template language verbatim for the exclusions, limitations, and member rights sections.6Department of Managed Health Care. APL 25-004 – AB 118 Part 1 – Compliance with Large Group Standardized Evidence of Coverage-Disclosure Form
Continuity of Care
If a provider leaves your plan’s network, or you switch plans, you may be able to keep seeing that provider for a transition period.7California Department of Managed Health Care. Continuity of Care The length depends on your situation:
- Acute conditions such as pneumonia: for the duration of the condition
- Serious chronic conditions such as severe diabetes: up to 12 months
- Pregnancy: through delivery and the postpartum period
- Terminal illness: for the remainder of the patient’s life
- Children under age 3: up to 12 months
- Scheduled surgery or procedure: must occur within 180 days
The departing provider must agree to accept the plan’s reimbursement rates and meet its credentialing standards for continuity of care to apply.
Surprise Bills
California has banned balance billing for emergency services since before the federal government acted. If you receive emergency care from an out-of-network provider, you pay only what you would have owed in-network. AB 72, codified at Health and Safety Code Section 1371.9, extended that protection to non-emergency care: when you go to an in-network hospital and are treated by an out-of-network doctor you did not choose, such as an anesthesiologist or radiologist, that provider cannot bill you beyond your in-network cost-sharing.
The federal No Surprises Act, effective since 2022, adds a nationwide floor of similar protections and requires providers to give patients a written notice explaining their billing rights.8Office of the Law Revision Counsel. 42 U.S. Code 300gg-111 – Preventing Surprise Medical Bills For Californians in Knox-Keene plans, state law generally offers equal or broader protection, while the federal law fills gaps for people in self-funded ERISA plans that state law cannot reach.
When Your Plan Says No
If your plan denies a claim, delays treatment, or fails to provide adequate access to a provider, start by filing a grievance directly with the plan. Plans must resolve grievances within 30 calendar days.9Legal Information Institute (LII) at Cornell Law School. California Code of Regulations Title 28 Section 1300.68 – Grievance System For urgent situations involving an immediate threat to your health, ask for an expedited review; urgent grievances must be decided within 72 hours.10California Department of Managed Health Care. Frequently Asked Questions
If the plan does not resolve your complaint within 30 days, or the answer is unsatisfactory, take it to the DMHC’s Help Center. The DMHC will review the dispute and work with the plan on a resolution.11California Department of Managed Health Care. How to File a Complaint with Your Health Plan You can skip the 30-day waiting period if your situation is urgent or if the plan denied care as experimental or investigational.
For denials based on medical necessity or experimental or investigational status, you can request an Independent Medical Review. The IMR is free. An independent panel of physicians who were not involved in the original decision reviews your case and issues a binding decision. Standard reviews are completed within 30 days; urgent reviews are typically decided within 7 days.10California Department of Managed Health Care. Frequently Asked Questions If the panel rules in your favor, the plan must authorize the service. Many coverage disputes are ultimately won this way, because plans overturn their own denials at a high rate once an IMR is requested.
Complaints involving broader patterns, such as deceptive marketing or systematic claim denials, can also be directed to the California Attorney General’s Healthcare Rights and Access Section, which investigates practices that affect Californians broadly rather than representing individual enrollees.12State of California Department of Justice – Office of the Attorney General. Health Care To compare plan quality before you enroll, the Center for Data Insights and Innovation publishes annual Health Care Quality Report Cards rating commercial HMO and PPO plans on clinical outcomes and patient experience.13CDII. About the Report Card Ratings