How a Stable Health Plan Became a Shock Event

AISD: What Happened To The Health Plan

Over the past few years, employees in many public-sector health plans, as well as private plans, have been told a familiar story:  healthcare costs are rising, prescription drug costs are rising, nothing can be done, and difficult changes were unavoidable.

But sometimes these explanations are incomplete.

This article is an attempt to explain, plainly, without any finger-pointing, how one health plan that appeared stable, well-funded, and protected against risk experienced a sudden surge in costs and a rapid drawdown of $30M of reserves.  The short answer is this:  the costs didn’t just appear out of nowhere.  They were “released”.

The Role of Stop-Loss: How Protection Can Mask Reality

Most self-funded health plans purchase stop-loss insurance to protect against catastrophic claims.  One form of this coverage, aggregate stop-loss, reimburses the plan when total claims exceed a predetermined threshold, known as the “attachment point”.

When attachment points are set conservatively, aggregate stop-loss functions as true insurance.  When they are set aggressively low, something else happens, the plan’s apparent costs are temporarily suppressed.

Claims don’t disappear, they are simply shifted to the stop-loss carrier, or absorbed by the stop loss carrier.  Here’s an example:  If the attachment point is set at $1M, claims beyond $1M will be reimbursed back to the plan.  So if total claims equal $1.1M, then $100K is absorbed by the stop-loss carrier, and paid back to the plan in a reimbursement.  If claims remain at $1.1M, but the attachment point is lowered to $900K, now $200K of liability has been shifted to the stop-loss carrier.  The inverse is predictable – if the attachment point moves to $1.2M, but the claims remain at $1.1M, the entire $1.1M of claims is paid by the plan, and there is no stop-loss claim/reimbursement.

For several years, AISD’s plan benefited from unusually low aggregate attachment points relative to prior and subsequent years.  As a result, total plan claims exceeded those attachment points in back to back years, despite claims remaining relatively the same.  This led to an aggregate claim in 2021/2022 of $5M, and a $7M claim the following year, 2022/2023. Gross claims, however, were comparable in the years prior to 2021/2022 and 2022/2023. This indicates lower attachment points in those two years when there were aggregate claims.

From the outside, costs appeared manageable.  Reserves grew.  The plan looked stable. But this stability depended on a condition that could not last:  artificially low attachment points.

What Happens When the Attachment Point is Corrected

Stop-loss carriers eventually correct underpriced risk.  When they do, attachment points rise, sometimes very sharply.

When that correction occurred (2023/2024), aggregate reimbursements stopped.  Claims that had previously been absorbed by stop-loss were now borne directly by AISD and the plan.

This change alone was going to require higher contributions from teachers and employees, as well as the planned use of some of AISD’s reserves.  That outcome was not unexpected, nor was it inherently a failure.  It was the inevitable end of a temporary subsidy.

On its own, this stop-loss adjustment could have been managed and corrected over a relatively short period of time (2-3 years).

But it did not occur in isolation.

The Other Half of the Story: Unit Costs Matter

At the same time aggregate protection was being reset with a much higher attachment point, the plan underwent a major operational transition.  The provider networks changed.  The third-party administrator (TPA) changed.  The pharmacy benefit manager (PBM) changed, and yes, the stop loss carrier changed.

These are not administrative footnotes, they are structural events.

Even when well-intended, significant vendor transitions carry known short-term financial risk:

• Provider discounts can weaken before new contracts stabilize,
• Out-of-Area claims often price less favorably,
• Claims repricing logic changes,
• Care continuity is disrupted,

None of this requires people to get sicker.  And in this case, they didn’t.

The Impact It Had

In the first year following these changes, gross medical claims increased rather significantly, despite a lower covered population of roughly 3400 employees.  AISD’s enrollment has slowly declined for several years.

Medical costs increased approximately $2,400 per employee per year (PEPY).  This means the district was paying $2,400 more per employee per year for the same medical services.

This type of increase is not typically driven by utilization, but by unit cost:  the price paid for admissions, per procedure, per service, etc. Simply put, the same care costs more.

Why Timing Turned Manageable Risk Into Shock

Either of these forces alone, the correction of the stop-loss attachment point or the disruption of pricing discipline and vendor change, could likely have been absorbed over a short period of time.

Together, they compounded all at once.

The plan lost its aggregate safety net at the same time unit costs increased sharply.  What could have been a 2-3 year stabilization became a single shock event.  Reserves were used rapidly (24 months).  Contribution increases ensued, and the whole experience felt sudden and severe.

But it wasn’t random.  It was the result of overlapping financial and operational shifts occurring simultaneously.

Why It Matters

Employees were told, and are being told, that healthcare costs are rising.  That statement is true.  But that explanation is incomplete.  Costs are rising, but here’s what is missing:

• How the prior stop-loss structure had muted costs
• Why that protection was ending
• How concurrent vendor changes increased unit prices paid for care

Without that context, the outcome feels arbitrary.  With it, the sequence and the whole event becomes understandable, even if still painful.

Lessons For The Future

Complex systems fail quietly and then all at once.  Health plans are no different.

Transparency is not about assigning blame.  It is about respecting teachers and employees enough to explain cause and effect, especially when decisions involve tens of millions of dollars in employee-funded reserves and tax-payer dollars.

Transparency doesn’t have to have a villain.  Transparency is often avoided because it gets mistaken as blame.  It isn’t.

In this case, the outcome was not the result of a single mistake or an unpredictable event, and it certainly isn’t the result of “trend” and the general “rising cost of healthcare”.  It was the product of timing, structure, and sequencing:  temporary risk protection that ended (stop-loss attachment point), combined with simultaneous operational changes that increased unit costs.

Those forces are clearly visible in the numbers, whether or not anyone meant for them to collide at the same time.  But when proper explanations are missing, people are left with outcomes but no context, and that causes trust to erode.  Trust erodes in the absence of clarity.

Transparency is telling the full story in the right order, and I felt compelled to share what the data shows.