Case Study: ACO REACH Grows Aligned Lives 30% with Mabel

The Challenge

Voluntary alignment is hard to do well at scale

In an analysis of 100,000+ fee-for-service (FFS) lives across several ACO REACHs, only about 40% of eligible beneficiaries were claims-aligned. This means that there is a large opportunity to grow attribution within practices using voluntary alignment—where beneficiaries proactively designate a provider as their primary clinician via a signed form.

But running a high-performing voluntary alignment program in-house surfaced three recurring problems.

Voluntary alignment needs a multi-channel approach.

Reaching unaligned beneficiaries at scale requires more than a single mailing. The ACO needed to run coordinated campaigns across direct mail, email, and in-clinic touchpoints to maximize response rates across a large and diverse beneficiary population.

Response processing requires lots of resources and is error-prone.

Once signed forms came back, manually keying in MBIs and TIN-NPI combinations introduced costly mistakes. Rejection rates from simple data-entry errors ran as high as 50%, wasting hard-won alignments and burning staff hours on rework.

Analytics help optimize campaign success.

Without real-time visibility into which channels, providers, and regions were converting, the ACO couldn't tell where to focus its limited outreach budget or how to course-correct mid-campaign.

The Solution

Mabel helped this ACO REACH grow its aligned lives by >30% in 1 year

Mabel took over voluntary alignment end to end—campaign execution, response processing, and alignment tracking & submission—so the ACO's team could focus on strategy instead of paperwork.

Chart showing net-new alignments (A0) growth over 12 months

Net-new alignments (A0) over 12 months

Campaign execution

Mabel ran coordinated, multi-channel voluntary alignment campaigns across direct mail, email, and in-clinic touchpoints—tailored to each participating provider's patient panel—to maximize response rates across the network.

Response processing

Mabel's purpose-built technology and built-in QC processes minimized data-entry errors on returned forms, cutting preventable rejections and protecting alignments the ACO had already earned.

Alignment tracking & submission

Mabel tracked every form from outreach to CMS submission, giving the ACO a real-time, audit-ready record of campaign performance across every channel and participating provider.

We previously handled voluntary alignment and beneficiary notification letters in-house, but it required a large team, was a huge headache, and resulted in a number of errors. Mabel has made these processes a lot easier and effective, so our team can focus on strategic tasks.

— Large ACO REACH

Mabel helps ACO REACH grow its aligned lives by 30% in 1 year