Arizona DDD Health Plans: Mercy Care vs UnitedHealthcare Community Plan

How the DDD Health Plan System Works

Once a young adult is approved for both DDD and ALTCS, they are enrolled in a specialized Medicaid managed care plan that integrates physical health, behavioral health, and long-term services and supports into a single coordinated network.

Arizona contracts with two managed care organizations (MCOs) to administer DDD Health Plans:

• Mercy Care — a regional plan with deep roots in Arizona's Medicaid system
• UnitedHealthcare Community Plan — the national insurer's Arizona Medicaid division

Members choose between these two plans upon enrollment. The choice is not permanent — you can switch during the initial 30-day enrollment window and again annually during the member's birth month.

What Both Plans Cover

The two plans administer the DDD Health Plan benefits defined by AHCCCS and DDD. Their practical differences are generally in provider networks and access, so confirm current coverage with each plan. Both plans cover:

• Home and Community-Based Services (attendant care, habilitation, respite, day programs)
• Physical health services (primary care, specialist visits, prescriptions, hospital care)
• Behavioral health services (therapy, crisis intervention, psychiatric care)
• Dental and vision
• Transportation to medical appointments
• Durable medical equipment and assistive technology

The DDD support coordinator works with the MCO to authorize specific services and hours under the member's Individual Support Plan (ISP). The MCO processes claims and manages the provider network.

Where the Plans Differ

The practical differences between Mercy Care and UHC show up in three areas:

Provider networks. Each MCO contracts with its own set of doctors, therapists, home care agencies, and habilitation providers. Network size and availability vary by region. In the Phoenix metro area, both plans have extensive networks. In rural Arizona — Yuma, the White Mountains, tribal communities — one plan may have significantly better coverage than the other.

Before choosing, check whether your child's current providers (pediatrician, therapist, behavioral health specialist) are in-network with each plan. Switching plans mid-treatment disrupts continuity and can mean re-establishing relationships with new providers.

Member services responsiveness. Families report different experiences with customer service, prior authorization timelines, and complaint resolution between the two plans. These differences are anecdotal and change over time as plans renegotiate contracts and adjust staffing. The AHCCCS website publishes annual member satisfaction survey results that provide a snapshot.

Network adequacy and "ghost networks." Recent provider disputes in Arizona have highlighted a systemic problem: MCOs authorize services but families cannot actually access them because local agencies lack staffing. This has been particularly acute in ABA therapy networks, where rate disputes and early-2026 terminations of specific autism networks have contributed to capacity reductions.

If your MCO authorizes services but you cannot find a provider with availability, contact the MCO's Member Liaison or submit a network adequacy complaint to AHCCCS to report the access problem and ask about a specialized single-case agreement or another available remedy.

How to Choose

For most families, the deciding factor is provider network overlap. Check whether your current and preferred providers accept the plan before enrolling. The DDD support coordinator can provide current provider directories for both plans.

If both plans cover your providers equally, other factors to consider:

• Ask other DDD families in your area about their experience with each plan's customer service and authorization speed
• Check AHCCCS member satisfaction data
• Consider whether the plan's behavioral health network includes the specific modalities your child needs

If you choose and discover the plan is not working — providers are unavailable, authorizations are delayed, or the network does not serve your region well — you can switch during your birth month the following year.

The Arizona IEP Transition to Adulthood Guide includes a health plan comparison worksheet that helps families evaluate both options against their specific provider needs and service history before making the enrollment decision.

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