AB 1570 expands what commercial health plans and many disability and self‑insured employer plans must cover for breast cancer detection. The bill requires coverage for screening and medically necessary diagnostic breast imaging — including MRI, ultrasound, contrast-enhanced mammography, and molecular imaging — and bars cost sharing for those services in most health insurance policies issued, amended, or renewed on or after January 1, 2028.
The measure also clarifies that referrals from participating nurse practitioners, certified nurse‑midwives, and physician assistants trigger coverage under disability plans, creates an obligation for insurers to arrange out‑of‑network care when network services are unavailable, and ties diagnostic standards to nationally recognized clinical guidelines. The change shifts utilization and cost onto payers and self‑insured employers while aiming to improve timely access to advanced diagnostic testing for people at elevated breast cancer risk.
At a Glance
What It Does
Requires health insurance policies and many self‑insured plans to cover screening mammography and medically necessary diagnostic breast imaging without cost sharing for plans issued, amended, or renewed on or after Jan 1, 2028; defines covered diagnostic modalities and links coverage to evidence‑based guidelines.
Who It Affects
Commercial health insurers, self‑insured employer welfare plans, disability insurers, imaging centers and radiologists, and patients at elevated risk for breast cancer — plus nurse practitioners, physician assistants, and certified nurse‑midwives whose referrals trigger coverage under certain disability plans.
Why It Matters
Shifts financial responsibility for higher‑cost diagnostic imaging onto payers and removes cost barriers for insured patients, while introducing operational demands around network adequacy, medical‑necessity determinations, and alignment with National Comprehensive Cancer Network (NCCN) or similar guidelines.
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What This Bill Actually Does
AB 1570 creates two related but distinct coverage rules. First, it treats disability insurance policies and self‑insured employee welfare benefit plans as providing mammography coverage — screening or diagnostic — when a participating nurse practitioner, certified nurse‑midwife, physician assistant, or physician refers the patient and acts within their lawful scope of practice.
That ‘‘deemed to provide’’ language means plans cannot deny that coverage category when a covered referral exists, although the statute explicitly permits copayments or deductibles for those disability benefits and does not require extending coverage to unrelated procedures.
Second, for hospital, medical, or surgical health insurance policies (and self‑insured plans) the bill mandates coverage without cost sharing for screening mammography and medically necessary diagnostic or supplemental breast imaging when the policy is issued, amended, or renewed on or after January 1, 2028. The list of covered diagnostic modalities is broad — diagnostic mammography, breast MRI, breast ultrasound, contrast‑enhanced mammography, and molecular breast imaging — and the statute conditions coverage on consistency with nationally recognized evidence‑based clinical guidelines, explicitly naming the National Comprehensive Cancer Network as the standard for diagnostic breast examinations.The statute also addresses practical access issues.
It limits the coverage obligation to participating (in‑network) providers but forces insurers to arrange out‑of‑network provision when network services are unavailable so patients receive timely care, pointing regulators and plans to existing network adequacy rules (Sections 10133 and 10133.54). For plans that meet the federal high deductible health plan (HDHP) definition under IRC §223(c)(2), the no‑cost‑sharing rule applies only after the enrollee meets the deductible, except that items the IRS already treats as preventive under §223(c)(2)(C) remain cost‑share‑free even if the deductible is not met.Finally, the bill leaves several insurance lines untouched: specialized health insurance, Medicare supplement, TRICARE/CHAMPUS supplements, hospital indemnity, accident‑only, and specified disease policies are excluded.
The statute also clarifies that disability insurers can impose out‑of‑network cost sharing except where the out‑of‑network arrangement is required by the network‑availability rule or other law. Taken together, these provisions broaden access to advanced diagnostic testing while creating a set of definitional and operational rules plans must implement before 2028 renewals.
The Five Things You Need to Know
The no‑cost‑sharing mandate for private health insurance applies to policies issued, amended, or renewed on or after January 1, 2028.
For plans that qualify as federal HDHPs under IRC §223(c)(2), the mandate applies only after the enrollee satisfies the annual deductible, except for services classified as preventive under IRS rules, which remain cost‑share‑free regardless of deductible status.
AB 1570 explicitly covers diagnostic modalities beyond standard mammography: breast MRI, breast ultrasound, contrast‑enhanced mammography, and molecular breast imaging when medically necessary and consistent with evidence‑based guidelines.
Insurers must arrange for out‑of‑network provision of required services if network providers cannot timely provide them, invoking the state’s network adequacy standards (Sections 10133 and 10133.54).
The statute excludes Medicare supplement, TRICARE/CHAMPUS supplements, specialized health insurance, hospital indemnity, accident‑only, and specified disease policies from its requirements.
Section-by-Section Breakdown
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Deemed mammography coverage on referral from participating advanced practice clinicians
This subsection deems disability insurance policies and self‑insured welfare benefit plans to provide mammography (screening or diagnostic) when a participating nurse practitioner, certified nurse‑midwife, physician assistant, or physician refers the patient and is acting within scope of practice. Practically, plans cannot argue that the policy category lacks mammography coverage when those referrals exist. However, the provision preserves the ability of those policies to apply copayments or deductibles and does not force expansion to unrelated services, so insurers retain traditional cost‑sharing levers within the disability insurance context.
No cost sharing for diagnostic and supplemental breast imaging in most health plans
Subdivision (b) is the core coverage mandate: health insurance policies that provide hospital, medical, or surgical coverage — and self‑insured plans — must cover screening mammography and medically necessary diagnostic and supplemental breast imaging without cost sharing, for policies issued/amended/renewed on or after Jan 1, 2028. The provision defines diagnostic breast imaging to include MRI, ultrasound, and other clinically indicated tests and ties covered diagnostic and supplemental exams to nationally recognized evidence‑based clinical guidelines, limiting payers’ discretion to reject certain modalities as experimental.
High‑deductible plan carve‑out and preventive exception
The bill recognizes federal HDHP rules: if a plan qualifies as an HDHP under IRC §223(c)(2), the no‑cost‑sharing requirement generally waits until the enrollee meets the deductible. The statute carves back that rule for items already designated preventive by the IRS, which remain cost‑free even if the deductible has not been met. This creates an implementation challenge for plans to classify specific diagnostic services as preventive versus diagnostic for HSA‑eligible plan compliance.
Network limitation plus out‑of‑network access requirement and exclusions for certain insurance types
The law limits required coverage to participating providers but requires insurers to arrange out‑of‑network services when network providers cannot timely deliver the required imaging, referencing existing network adequacy statutes (10133 and 10133.54). Subdivision (e) allows disability insurers to impose out‑of‑network cost sharing unless the out‑of‑network arrangement is required by paragraph (2) of (c) or other law. Subdivision (d) lists insurance categories excluded from the statute (Medicare supplement, CHAMPUS/TRICARE supplements, specialized health insurance, hospital indemnity, accident‑only, specified disease), so the mandate applies to commercial group and individual major medical coverage but not to those excluded lines.
Definitions and clinical guideline standard
This subsection supplies operative definitions: breast MRI, breast ultrasound, diagnostic mammography, diagnostic breast examination, and supplemental breast examination. It expressly ties diagnostic and supplemental exam appropriateness to the National Comprehensive Cancer Network Guidelines or other nationally recognized evidence‑based guidelines, which constrains payers’ medical‑necessity review to those sources but also imports whatever ambiguities or updates exist in those external guidelines into plan coverage determinations.
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Explore Healthcare in Codify Search →Who Benefits and Who Bears the Cost
Every bill creates winners and losers. Here's who stands to gain and who bears the cost.
Who Benefits
- Insured people at elevated breast‑cancer risk (including those with family history, known genetic mutations, or dense breasts): the bill removes cost sharing for advanced diagnostic imaging when medically indicated, reducing financial barriers to follow‑up testing after abnormal screens.
- Patients using nonphysician referrers (nurse practitioners, certified nurse‑midwives, physician assistants): subsection (a) makes their referrals sufficient to trigger coverage under disability and self‑insured welfare plans, strengthening their role in care coordination.
- Radiology clinics and hospitals offering advanced breast imaging (MRI, contrast‑enhanced mammography, molecular imaging): expanded coverage and reduced out‑of‑pocket costs for patients are likely to increase utilization of higher‑cost diagnostic services.
- Advocacy and public‑health stakeholders focused on cancer detection equity: the law lowers financial barriers that disproportionately impact medically underserved populations and can improve timely diagnostic follow‑up.
Who Bears the Cost
- Commercial health insurers and administrators of self‑insured employer plans: they must cover additional modalities with no cost sharing, adjust benefits, and absorb utilization and price impacts or renegotiate provider contracts to contain costs.
- Self‑insured employers who offer HDHPs: while preventive carve‑outs may limit some exposure, the expanded diagnostic coverage (post‑deductible or as preventive where applicable) will change plan cost projections and potentially premiums or employee contributions.
- Plan network managers and compliance teams: arranging out‑of‑network access when network capacity is insufficient creates administrative burdens, requires new processes, and may increase payments for services delivered out of network.
- State regulators and enforcement agencies: monitoring compliance with the no‑cost‑sharing mandate, network adequacy requirements, and correct application for HDHPs will require guidance and oversight resources.
Key Issues
The Core Tension
The bill pits improved access to sometimes costly, advanced diagnostic imaging — which supports earlier detection and equity of care — against payers’ need to control utilization and premiums; enforcing timely out‑of‑network access solves access shortfalls but shifts costs and payment disputes into administrative and regulatory channels with no easy compromise.
AB 1570 tries to thread a difficult needle: expand access to higher‑cost diagnostic imaging while deferring some costs to payers and preserving traditional insurance design where federal law requires. That balancing act raises predictable implementation headaches.
First, the HDHP carve‑out ties state coverage duties to federal IRS classifications; plans and regulators must determine which specific imaging services qualify as preventive under IRS guidance versus diagnostic for HSA‑eligible plans, a categorical question that may change with federal guidance or IRS rulings.
Second, the statute relies on ‘‘nationally recognized evidence‑based clinical guidelines’’ (it cites the NCCN). That limits arbitrary denials but imports the timing and content of those external guidelines into coverage decisions.
Insurers and providers will dispute edge cases — for example, when contrast‑enhanced mammography or molecular imaging is ‘‘medically necessary’’ versus experimental — requiring appeals and potentially new utilization‑management protocols. Third, the out‑of‑network access obligation references existing adequacy statutes but does not define ‘‘timely’’ or set payment standards for OON imaging; that gap may produce disputes over when an insurer must authorize OON care and at what rate, particularly in areas with few advanced imaging centers.
Finally, the drafting leaves room for operational confusion: AB 1570 mixes a ‘‘deemed to provide’’ rule for disability plans with a separate no‑cost‑sharing mandate for health plans, and it preserves cost‑sharing in some disability contexts. Those parallel regimes will require clear plan amendments and member communications to avoid coverage denials and incorrect patient billing.
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