A hospital now publishes the exact rates it negotiated with your health plan. Most self-funded employers have not opened the file.
That is a chance most employers have not opened. On January 1, 2021, the CMS Hospital Price Transparency final rule, 45 C.F.R. Part 180, began requiring hospitals to post payer-specific negotiated rates, gross charges, discounted cash prices, and minimum and maximum negotiated charges in machine-readable files. For the first time, a self-funded employer can check what a hospital actually agreed to accept from its network.
Before the rule, hospitals posted chargemaster prices that almost no payer actually paid. A third-party administrator (TPA) could show a large discount off that inflated number and still leave the employer paying far above the real negotiated rate. The 2021 rule changed what sits in the file. Hospitals now publish the negotiated rates themselves. A discount off a fictional price is not a discount.
Patient shopping stalled for reasons that have little to do with employer use. A planned service requires the patient to know the CPT code, the allowed amount, and the remaining deductible before comparing hospitals. Emergency and inpatient care are not chosen by opening a price file in advance. The data was built for machines, not for families.
Why Self-Funded Employers Could Not Check Prices
In a self-funded plan, the employer pays claims directly. A third-party administrator adjudicates those claims, but the employer carries the financial risk. Before 2021, most employers could not see the negotiated rates their TPA accepted on their behalf. Network contracts stayed confidential. An employer received a summary showing discount percentages, not dollar amounts, and had no independent way to check those percentages against what the hospital actually agreed to accept.
The hospital file now lists those rates by payer and by service code. A benefits analyst can take a high-dollar claim, locate the hospital's machine-readable file, identify the payer-specific negotiated charge for the relevant CPT code, and compare that number with the allowed amount on the explanation of benefits. If the claim exceeds the published rate, the employer has documentation for a billing correction.
The comparison is supported by data. RAND Corporation's Hospital Price Transparency Study 4.0, published in May 2024, reported that private insurers paid 254 percent of Medicare rates for the same hospital services in 2022. The United States spends about $12,900 per person per year on healthcare. About one in three Americans has skipped care or a prescription because of cost. Price transparency made one piece of that problem visible.
What a Published File Lets You Verify
- Allowed amounts against payer-specific negotiated rates on high-cost hospital claims
- Whether the network discount reported by a TPA matches the hospital's published rate
- Price differences among hospitals in the same market for the same high-volume procedures
- Stop-loss exposure by procedure and facility
- Reference prices for out-of-network or no-network bills
Each of those checks uses the hospital's own posted rates as the benchmark.
The Files Are Messy, Which Helps Early Adopters
Hospital machine-readable files do not arrive as clean spreadsheets. They use inconsistent schemas, nested rate tables, and missing fields. A negotiated rate often sits inside a JSON array under several layers of metadata. CMS enforcement has pushed some hospitals to improve completeness, but a benefits team still cannot download a file and treat it as a finished data set.
That friction slowed the consumer shopping story. It also gives employers with data support an early advantage. A small audit team can start with one high-volume hospital in the largest employee market and five high-cost procedure codes.
The TPA Oversight Shift
Employers used to accept a TPA's summary of network discounts because they had no independent source. The hospital's published file now serves that role. When an employer asks a TPA to reconcile an allowed amount against the hospital's posted payer-specific rate, the relationship moves from trust to verification. Some TPAs will welcome that. Others will resist because the audit exposes spread, misapplied contracts, or billing errors.
A Quarterly Routine
A recurring quarterly reconciliation turns this from a one-time accusation into a routine process. The employer reviews the highest-dollar hospital claims each quarter, pulls the relevant payer-specific rates from the hospital file, and asks the TPA to explain any difference that exceeds a set threshold. Set the threshold at 5 percent or a flat dollar amount. The routine matters more than the number.
Pricing and Claim Volume Work Together
Hospital price transparency controls unit price. Prevention and first-dollar access control claim volume. Employers that work both sides see the compounding effect. Fewer hospital claims occur when employees use lower-cost access points first, and the claims that remain get verified against published rates.
WellthCare™ fits here on the cost management side. The plan includes medical bill review and cost transparency tools, and the pharmacy side uses no spread pricing. The design assumes bills should be checked, not accepted. Hospital price files give employers an external benchmark for that check. When employees use WellthCare first for $0-co-pay preventive care, fewer claims hit high-priced hospital settings, but the claims that still occur need the same verification.
Start With One Hospital and Five Codes
Benefits teams can act this quarter. Pick one hospital where employees file the most claims. Pull a month of claims data. Match five high-cost CPT codes to the hospital's machine-readable file and compare allowed amounts to the published payer-specific rate. If a claim exceeds the published rate, ask the TPA to explain the difference in writing.
The hospital file covers facility charges. A full audit must also check professional charges from physicians who bill separately, often for services in the same facility. Start with the facility rates first because they are the easiest to match and the largest line item on a hospital claim.
The result will document an overpayment or confirm that the TPA's pricing is accurate. Both outcomes beat paying without evidence.
See what a WellthCare Plan would look like for your team. Healthcare that pays you back.
This article is for general information only and is not legal, tax, or medical advice. Employers should consult their own advisors.