Who owes the PPS dollar: an FQHC operating guide to payment floors by payer class

Why the floor matters more than the fee schedule

Most physician practices live on fee schedules: the payer sets an allowed amount per code, and the revenue cycle team chases the difference between billed and allowed. An FQHC lives on something else. For most of its volume, the payment that matters is a per-visit floor, the prospective payment system (PPS) rate or an approved alternative, and the question on every short-paid encounter is not whether the plan paid its fee schedule but whether anyone owes the difference up to the floor.

That question has a different answer for each payer class. Federal law gives Medicaid managed care encounters a state supplemental payment, gives Medicare Advantage encounters a supplemental payment from CMS, gives Marketplace plan encounters a contractual floor with an exception, and gives most commercial encounters no floor at all. If the billing team treats every below-PPS payment as a plan underpayment, it files appeals the plan has no duty to pay, and it misses claims that a state report or a CMS claim would have paid.

This guide walks the payer classes in order of the dollars they carry, sets out who owes the gap in each, and ends with the operating controls we install so the money is claimed from the right party on time.

Where health center revenue actually comes from

The national Uniform Data System makes the order clear. In 2025, 1,356 Health Center Program awardees reported $41.9 billion of patient service collections. Medicaid accounted for 59.47% of those collections, private insurance 19.57%, Medicare 15.89%, self-pay 3.98% and other public programs 1.09%. By patient count, 47.51% of health center patients had Medicaid or CHIP Medicaid as their principal medical insurance.

Medicaid is not only the largest stream; it is the stream where the floor does the most work. Health centers reported $5.80 billion of Medicaid reconciliation and wraparound collections for the current year and $1.16 billion for previous years in 2025, on top of claim payments. On the capitated Medicaid managed care line, net retroactive settlements equalled 50.56% of charges. A health center that does not file its wraparound reports cleanly is not missing a rounding error; it is missing a large share of its Medicaid revenue.

Who owes the gap: the payer-class map

The table below is the map we hand to billing, AR and finance teams. Each row names the party that owes the difference between what the payer paid and the floor, the authority, and the mechanism. The sections that follow explain each row and the traps inside it.

Medicaid managed care: the plan pays first, the state closes the gap

Section 1902(bb)(5) of the Social Security Act requires the state plan to pay an FQHC or RHC that contracts with a Medicaid managed care entity a supplemental payment equal to the amount, if any, by which the PPS amount exceeds what the contract paid. The statute also sets a pace: the payment schedule is agreed between the state and the center, but in no case less frequently than every four months. Some states also use an approved alternative payment methodology, which must pay at least what PPS would have paid.

States implement this differently, and the details decide whether a short-paid encounter is a plan debt or a state receivable. Pennsylvania is a useful example because its handbook is explicit. Appendix E of the PROMISe provider handbook says Medicaid MCOs must pay network FQHCs and RHCs at the minimum of the provider-specific PPS rate, provided the health center opts in to that alternative payment methodology. The Department may then pay or recover the difference between PPS and the MCO payment for each eligible encounter that was not denied by the MCO, through a quarterly wraparound report due seven months after the end of each calendar quarter.

Three operating consequences follow, and they apply in most states with a similar design:

• A denied encounter is not a wraparound encounter. In Pennsylvania, denied MCO encounters go in the Denials Section of the report and cannot be counted as paid. The plan has to pay the claim before the state reconciliation can reach it, which is why appeals still matter even where a wraparound exists.
• The reconciliation runs both ways. If the report shows the center was overpaid, the center owes the state, and the state may offset the amount against future claims. Never book wraparound as one-directional upside.
• Opt-in and contract status change who owes the money. Before calling a below-PPS MCO payment an underpayment, confirm whether the center opted in to the state APM and what the plan contract says.

Medicare Advantage: CMS, not the plan, owes the difference

Medicare Advantage is where we most often see health centers chase the wrong party. Under 42 CFR 405.2469, an FQHC under contract, directly or indirectly, with an MA organization is eligible for a supplemental payment for FQHC services to that plan's enrollees, covering the difference, if any, between the MA plan payment and what the center would receive under the PPS. The supplemental payment is made per visit, when a covered face-to-face encounter or a qualifying mental health telecommunications encounter occurs.

Two details matter in practice. First, the supplemental payment is calculated on a per-visit basis against what the plan paid, less the cost sharing the center may charge the enrollee under its MA contract. Second, financial incentives under the MA contract, such as risk pool payments, bonuses or withholds, may not be counted in the calculation. A center that nets its year-end MA bonus against its visit-level shortfall understates what it is owed.

Operationally, this means the MA line in your AR should never carry a below-PPS balance as a plan appeal. It should carry it as a CMS supplemental payment receivable, worked through the Medicare contractor's process for MA supplemental claims, with each visit's plan payment captured from the remittance.

Original Medicare: the PPS claim itself

Original Medicare pays FQHC claims at 80% of the lesser of the center's charges or the FQHC PPS rate for the specific payment code, which is the national encounter-based rate with geographic and other adjustments. For CY 2026 the base payment rate is $207.72. Because Medicare pays the lesser of charge or PPS, a charge master set below the PPS rate for a payment code caps the payment at the charge. We check the charge on every FQHC payment code against the adjusted PPS rate each January, when the new base rate takes effect.

Two newer items sit beside the PPS line. Mental health visits by telecommunications are paid as FQHC visits. Non-behavioral distant site telehealth is not: it is paid at a separate national rate, and from October 1, 2026 it must be billed with the specific CPT or HCPCS code instead of G2025. Neither has a wraparound.

Marketplace plans and commercial insurance

Qualified health plans sold on the Marketplace have a federal floor with an exception. Under 45 CFR 156.235(e), a QHP issuer must pay an FQHC no less than the amount the center would have been paid under section 1902(bb), the Medicaid PPS. The same paragraph allows the issuer and the center to agree on a different rate, as long as that rate is at least equal to the issuer's generally applicable payment rate. So a QHP payment below PPS is a contract question first: read the agreement before calling it an underpayment.

Employer-sponsored and self-funded commercial plans, and most commercial dental plans, carry no FQHC floor in federal law. The contract governs. That does not make commercial revenue unimportant: in the 2025 national data, private insurance produced 19.57% of health center patient service collections. It means the tools are different. Commercial shortfalls are worked against the contracted fee schedule with appeals and contract enforcement, not with wraparound reports.

How the collection ratios read by payer

The national UDS data shows how differently these streams behave on the same charge base. The ratios below are collections divided by full charges, as reported on Table 9D. They are not measures of underpayment, because health centers set their own charges and the PPS rate does not move with charges. They are useful as a sanity check: a center whose Medicaid managed care line runs far below the national ratio, or whose Medicare Advantage fee-for-service line looks like commercial, should ask whether its wraparound and supplemental payment claims are reaching the ledger.

The operating controls we install

Knowing who owes the gap is half the work. The other half is a revenue cycle that routes each short-paid encounter to the right party before the clock runs out. These are the controls we put in place in the first ninety days of an FQHC engagement:

• Payer-class tagging at registration. Every plan in the system carries a class: Medicaid FFS, Medicaid MCO (with opt-in status), Original Medicare, Medicare Advantage, QHP, commercial, self-pay. The class, not the plan name, drives the follow-up route.
• A floor table by payer class and encounter type. The provider-specific Medicaid PPS rates from the state rate letter, the adjusted Medicare PPS rates, and any QHP contract rate, each with an effective date, so every remittance can be compared to the floor the day it posts.
• Separate receivables for separate debtors. Plan underpayments, state wraparound receivables and CMS supplemental payment receivables live in different buckets, so no one appeals a plan for money the state owes, or waits on a state report for money the plan owes.
• Denial first, wrap second. Medicaid MCO denials are worked on the plan's appeal clock because a denied encounter usually cannot be counted in the reconciliation.
• A wraparound calendar. Each state report, its due date and its revision rules on one calendar, with denied encounters re-reported when the plan later pays them.
• Two-way reconciliation. Expected wraparound is booked net of likely paybacks, and overpayments are reserved rather than spent.
• Charge master review each January. Every FQHC payment code is checked against the new Medicare PPS rate so the lesser-of rule never caps payment at a stale charge.

Five mistakes that cost health centers the floor

Most of the lost floor revenue we find is not hidden. It sits in plain sight on the AR report, filed under the wrong debtor or the wrong clock.

• Appealing a Medicare Advantage plan for the difference up to PPS. The plan has no duty to pay it; CMS does, through the supplemental payment. The appeal ages out and the supplemental payment is never requested.
• Writing off a denied Medicaid managed care encounter on the assumption that the wraparound will cover it. Where the state reconciles only paid encounters, the denial must be overturned first or the floor is lost entirely.
• Booking expected wraparound as cash before the report is filed and reviewed. When the reconciliation finds an overpayment, the payback lands in a later year as an unplanned loss.
• Treating a low Marketplace payment as an underpayment without reading the agreement. If the signed rate is at least the issuer's generally applicable rate, the payment may be exactly what the contract allows.
• Letting the charge master drift below the PPS rate. Under the lesser-of rule, Original Medicare pays 80% of the charge when the charge is lower, and no appeal recovers that difference.

A ninety-day starting plan

In the first thirty days, we tag every active payer by class, load the floor table, and pull twelve months of paid encounters to size the gap by payer class. In days thirty-one to sixty, we split the receivables by debtor, file any wraparound or supplemental payment claims still inside their windows, and move Medicaid MCO denials to the front of the appeal queue. In days sixty-one to ninety, we turn the floor comparison into a daily posting check, so a below-floor payment is routed the day it lands rather than discovered at the next cost report.

None of this needs new software. It needs the payer class on the account, the floor in a table, and a team that knows which door to knock on. Our state-by-state FQHC payer matrix and rate calendar track the published notices that change those floors during the year.