The Hidden Multiplier Behind Home Care Stocks

Amedisys delivers nursing and therapy to patients' homes across America. It generated roughly $2.4 billion in revenue over the last twelve months and produces about $235 million in free cash flow. It is the kind of company an investor studies for labor costs, episode volumes, and Medicare payment rates.

But nobody is talking about the arithmetic that decides whether Amedisys's patients can afford to be patients at all.

The number is the Federal Poverty Level. Not as a headline figure, but as a formula. A multiplier that changes depending on whether you live alone, with a spouse, with children, or with all three. That multiplier is what determines whether a household falls above or below the Medicaid income threshold. And Medicaid is where a large and growing share of home care revenue flows.

A Korean university study released in September 2026 shows that the multiplier governments use to scale household income needs — called an "equivalence scale" — is not a neutral number. It depends on household composition, on what the household actually buys, and on what the government program is trying to accomplish. The U.S. uses its own version of this scale every single day to decide who gets Medicaid. The shape of that scale is invisible to investors. It should not be.

The formula hiding inside eligibility

Here is the picture most investors carry: Medicaid eligibility is about poverty. Poor people get Medicaid. The poor get richer in absolute numbers because the population ages, so home care stocks grow. End of mechanism.

The deleted part is the multiplier.

In the 48 contiguous states, a single person in 2026 earns too much for Medicaid if their annual income exceeds about $22,000 — that is 138% of the Federal Poverty Level, which is roughly $15,960 for one person. Now add a second person to that household. The poverty line does not double. It adds roughly $5,680. The threshold becomes roughly $27,640. Add a child, and the next bump is another ~$5,680.

That increment — $5,680 per extra body in the house — is the equivalence scale. It is the same mathematical concept the Pusan National University researcher Prof. Taiwon Ha studied, published in . His paper found that these multipliers are not one-size-fits-all. They should differ depending on whether the household contains more adults or more children, whether the spending category is something you share (housing) or something you consume individually (food, healthcare services), and what the welfare program is trying to achieve.

The U.S. uses a single linear increment for household size when setting the Federal Poverty Guidelines. It is a blunt tool. And it controls access to a program that, in 2024, absorbed $931.7 billion of national health expenditure — 18% of all health spending in the country.

Now label the props.

The base amount ($15,960) = the poverty line for a solo household. The increment (~$5,680 per extra person) = the equivalence scale adjustment. The percentage (138% in most expansion states) = the Medicaid eligibility threshold. The product = who qualifies. Who qualifies = who receives home health services funded by Medicaid. Who receives services = which companies get paid.

A two-person comparison

Put away the policy debate for thirty seconds. Run the numbers.

Single person, $19,000 income. The Medicaid cutoff at 138% of the poverty line is about $22,000. This person qualifies.

Family of three, $52,000 income. That is $17,333 per person — less than the single earner on a per-capita basis. But the household threshold is $15,960 + ($5,680 × 2) = $27,320, times 138% = about $37,700. This family of three does not qualify, even though each person earns less than the single person above.

The increment decided the outcome. Not the per-person income. Not the total need. The chosen arithmetic.

This is precisely what Prof. Ha's research demonstrates. Empirical scales generally fall below the old OECD benchmark restrict eligibility. Larger ones expand it. And different scales are appropriate for different programs — minimum income support should weight adults differently than education assistance weights children. The U.S. uses one scale for all of it.

Where the money flows

Medicaid spending grew 6.6% in 2024 to $931.7 billion. It funds long-term services and supports, including home health aides, personal care services, and community-based care for elderly and disabled individuals. Companies that deliver these services have a direct revenue line to the eligibility formula.

Amedisys (NASDAQ: AMED), trading near $101, is one of the largest U.S. home health and hospice providers. Its revenue comes from Medicare, Medicaid, commercial payers, and self-pay patients. The company has roughly $940 million in total debt against $1.275 billion in equity and generated about $239 million in operating cash flow over the trailing twelve months. Its payer mix matters because Medicare reimburses at a fixed episode rate, while Medicaid reimbursement varies by state and is generally lower per visit. A shift in Medicaid enrollment — up or down — changes volume, mix, and margin.

Health Care Services Group (NASDAQ: HCSG), at roughly $22 a share with a $1.5 billion market cap and a P/E around 12, runs home care programs heavily dependent on government-funded populations. Its revenue is sensitive to state-level Medicaid eligibility decisions, waiver programs, and managed care contracts that channel Medicaid beneficiaries.

You do not need to own these stocks to understand the mechanism. You need to understand that a policy formula determines the demand side of companies whose valuations price in steady growth from an aging population. The aging narrative is real. The eligibility formula is the on-ramp.

The clock that investors rarely check

Policy changes to the formula or the threshold move the entire eligible population up or down the ladder. The recent federal budget reconciliation law introduced provisions that affect Medicaid: work requirements for adults aged 19-64 starting in 2027, immigration-based eligibility restrictions taking effect in October 2026, and recertification periods shortening from annual to every six months. These do not change the Federal Poverty Guidelines themselves, but they change who stays enrolled among those who initially qualified.

Think of it as a revolving door. The formula sets the threshold at the entrance. The work requirements, recertification rules, and immigration provisions control how fast people cycle through. A home care company that signed up a patient two years ago may lose that patient not because the patient's health improved, but because the clock on eligibility ran out and the household could not navigate a faster recertification cycle.

The Korean study adds another layer of tension. If the U.S. were to ever reform its poverty guidelines to use different increments for different household types — say, recognizing that adult-heavy households consume more healthcare individually while child-heavy households share more housing costs — the net effect could be to shift eligibility from one demographic to another. Not necessarily shrinking the total pool. Redistributing it. Home care companies serve specific age bands. A shift from elderly single-person households toward working-age families changes the case mix even if total episodes stay flat.

That analogy has now done its job. Here is where it breaks.

The equivalence-scale framework explains who enters the Medicaid pool. It does not predict whether those eligible people need home care. That depends on health status, hospital discharge patterns, and physician referral behavior. It does not tell you what a state will actually reimburse per visit — Medicaid rates vary wildly and are often below cost. It does not capture the managed care layer, where Medicare Advantage and Medicaid Managed Care organizations negotiate rates and control utilization. And it certainly does not price in labor supply, which is the single largest cost for home care companies and the variable that has squeezed margins as aggressively as any policy change.

Understanding the eligibility formula is a lens, not a crystal ball. It tells you where demand pressure enters the system, not whether a given company captures it.

The test you can run

When you look at a home care or community-based health services company, check two things the multiplier story makes relevant:

First, payer concentration. What percentage of revenue comes from government payers, and how much of that is Medicaid versus Medicare? Medicare pays per episode under a federal formula. Medicaid varies by state and is tied to eligibility. The more Medicaid-dependent the company, the more exposed it is to the poverty-line formula and the enrollment rules sitting on top of it.

Second, geographic distribution. Medicaid eligibility thresholds are set at the federal poverty level but administered by states. Expansion states use 138% of the FPL. Non-expansion states set their own limits, often far lower. A company operating mostly in expansion states has a broader eligible base — but also faces lower per-visit reimbursement. A company concentrated in non-expansion states may serve a narrower, higher-acuity Medicaid population with different revenue dynamics.

The multiplier matters because the demand for home care services does not emerge from thin air. It flows through an eligibility gate. The gate is a formula. The formula is a political choice wrapped in arithmetic. And the companies on the other side of that gate are priced as though demand is just a demographic trend, not a policy decision.

If you remember one test, use this one: next time a home care stock prints revenue growth, ask whether the growth came from more episodes per patient or more patients crossing the Medicaid line. The revenue looks the same. The sustainability does not.