ShieldLync: What It Is and How It Works

If you've followed this series, you know the numbers. 2.9 million Medicare Advantage members displaced for 2026, a tenfold increase in forced disenrollment, rural members disrupted at twice the rate of urban, 7 states above 40%, and Humana already confirming another 600,000 members for 2027 with letters landing in September.

You also know the underlying issue: CMS publishes the data that predicts nearly all of it, and almost nobody can use it.

ShieldLync is what we built about that.

The shape of the product

ShieldLync is a book-of-business protection engine. It processes public CMS data to find Medicare plan disruptions, exits, service area reductions, terminations and benefit degradation, and it surfaces the result as a ranked list of who to call. The pipeline covers 137,714 plan-by-county records, of which 24,749 are currently flagged CRITICAL. These numbers may change when the new CMS file is published within the next week.

There are three ways to use it, and you can start with the lightest one. Look up a single plan by ZIP and plan ID and get risk status and alternatives back instantly. Upload your book as a CSV and get every member flagged. Or call the API directly, with a key you generate yourself from the dashboard. There's no integration project, no engineering sprint, and no change to how your agents work.

The upload needs two columns: ZIP and plan ID. Everything else is optional. Run it that way and you're working entirely on plan-level CMS data, which carries no HIPAA implications. Add phone, name, age and gender and the same scan also returns call priority and product routing per member. That's a choice you make column by column, not a precondition.

It's Medicare only. The data refreshes weekly through peak season, within days of CMS publishing, and monthly in the winter lull.

Nine datasets, one join

Plan crosswalks identify which plans are terminating, consolidating or non-renewing, and where CMS directs the affected members. This is the backbone of disruption detection.

Service area files, one for MA and one for PDP, identify plans keeping their contract but dropping specific counties. Members in dropped counties lose coverage; members in retained counties do not. This has to be mapped county by county or it's meaningless.

Star ratings carry two jobs. They feed the quality term in replacement scoring, and a rating under 3.0 and falling is what moves a plan onto the watch list before any announcement.

Enrollment data shows plan-level membership trends. A year-over-year decline past 15% often signals instability well ahead of a formal filing.

Contract and plan info, monthly, identifies org name, plan type and contract status.

Landscape files, one each for MA and PDP, published annually in October, supply premium, MOOP, benefits and county-level availability. This is where the benefit comparison comes from.

A HUD ZIP-to-county crosswalk sits underneath all of it, because a single ZIP can span several counties and a plan can be exiting one of them and not the others. About 70% of ZIPs resolve to a single county. For the rest we take the most restrictive answer: if the plan is exiting in any county the ZIP touches, the member gets flagged. We'd rather hand you a call that turns out fine than miss one that doesn't.

What comes back

Risk classification. Every member on your book sorted into CRITICAL, WARNING, WATCH or SAFE, with the reason attached in plain language. CRITICAL isn't taken on one source: a crosswalk alone won't do it. The plan also has to be missing from the county's service area file or carrying a star rating under 3.0, or the flag gets downgraded to WARNING pending a second source.

Replacement recommendations. Up to 5 options for every plan and county in the file, not just the ones in trouble, scored on premium similarity, star quality, benefit overlap and carrier continuity. The plan CMS crosswalks members into gets an explicit bonus and lands at the top when it exists. More than 157,000 of these are pre-computed, so the answer is already sitting there when the agent opens the record.

SEP eligibility. Whether the disruption opens a special enrollment period for that member and when it closes. This is what turns a list into a sequence.

Agent call sheets. Ranked by risk level first, then by how reachable the member is, then by whose SEP expires soonest. SAFE members are off the list and so is anyone without a usable phone number. What changed, why, what the alternatives are and which one to recommend, written to be usable out loud rather than read silently.

On star ratings, since they're the most underused file

Most people read CMS star ratings as a quality measure, which they are. They're also the best available leading indicator of plan viability.

CMS raises the benchmark by 5 percentage points for plans rated 4 stars and above, and by 10 points in double-bonus counties. KFF puts total quality bonus spending above $13B for 2026. When a plan slips from 4.0 to 3.5 it doesn't lose half a star on a marketing sheet, it loses the bonus entirely, and that triggers a strategic review that frequently ends in a service area reduction or a market exit 12 to 18 months later. Slip below 3.5 and the rebate percentage drops as well, from 65% to 50% of the gap between benchmark and bid, so the second cliff is steeper than the first.

The 2026 exits followed that pattern, and the 2027 exits are following it again. The majority of the Humana plans exiting for 2027 are rated 3.5 stars or below for the 2027 bonus year, though Humana has said star ratings were not the primary driver.

Star ratings publish in October, ahead of open enrollment. If you manage a Medicare book, that release should trigger an analysis rather than a bookmark. ShieldLync picks the file up on its weekly pass and your next scan reflects it.

Who it fits

Independent agents with a few hundred Medicare members, where the free tier covers plan lookup and the book scan is $149 a month. Below a couple hundred members a diligent agent can track plan changes by hand. Above it they can't, and building this in-house isn't a rational use of capital.

Agencies in the 2,000 to 25,000 member range that need an aggregate view of risk and a way to hand outreach to a team.

FMOs that need a single view of disruption exposure across multiple downline agencies, with API access and white-label.

Where to start

The 2027 cycle is already in motion. Humana's letters go out in September, and the other carriers will follow through the fall. Every agency will find out eventually. The ones that find out now get a window to prepare; the ones that find out in October get a queue.

If you manage a Medicare book and want to see how it maps against the 2027 disruption data, reach us at info@risklync.com.

We built ShieldLync because agencies should have the same view of this market that the carriers already have. The data is public. The advantage goes to whoever reads it first.