The $1.7 Billion Hidden Tax on Every Hospital That Hires a Temp Doctor
Of 8,279 OBGYN locum tenens listings posted in the first half of 2026, exactly 119 disclosed an actual dollar rate. The other 8,160 said "competitive" or "DOE" and waited for the phone to ring. Staffing agency markups on temporary physicians run 20 to 60 percent, hospitals have no independent benchmarking data to know whether they are overpaying, and the entity that runs the dominant marketplace is also the industry's largest seller. The rate intelligence layer that hotels, apartments, and self-storage built decades ago does not exist in physician staffing.
The Problem
A single unfilled physician position bleeds $2.6 million per year in lost revenue, according to CHG Healthcare's 2025 State of Locum Tenens report. That is not a rounding error; it is roughly what a midsize community hospital earns from its entire orthopedics service line. So when a hospital needs a temporary physician, it pays what the agency asks. The agency knows it, the hospital knows it, and the negotiation proceeds accordingly, which is to say it barely proceeds at all.
The U.S. locum tenens market hit $9.6 billion in 2025 and is projected to reach $9.9 billion in 2026, growing 4 to 5 percent annually according to Staffing Industry Analysts. About 52,000 physicians now take locum assignments each year, roughly 6 to 7 percent of the active workforce. This is not a fringe staffing category. Ninety-four percent of healthcare facilities used locum tenens in the past year. And it is infrastructure, a permanent structural feature of American healthcare delivery driven by a physician shortage that will only get worse.
And yet the pricing is medieval. Hospitals spend approximately 60 percent of total operating expenses on labor, about $1.009 trillion in 2025 according to the American Hospital Association. Within that, locum tenens is the most expensive per-hour category and the least transparent. When a CFO needs an emergency medicine physician to cover three months of night shifts, she knows what the agency bills. She does not know whether that number sits at the 25th percentile or the 90th, because the data to make that comparison has never been aggregated for buyers.
The opacity is structural and deliberate: staffing agencies profit from the gap between what hospitals pay and what physicians receive, so they have no incentive to publish benchmarks. Era Locums analyzed 8,279 OBGYN locum listings in early 2026 and found that 1.4 percent disclosed a dollar rate. The rest were priced through bilateral negotiations where the hospital had no external reference point. Compare this to every other major procurement line in hospital operations: drugs have Medi-Span and RED BOOK, devices have ECRI, supplies have Vizient and Premier GPO analytics. Even the janitorial contract is benchmarked, but the most expensive contingent labor category in hospital operations, $9.6 billion in physician placements billed at $140 to $600 per hour depending on specialty, has no benchmarking system at all.
The closest thing is CHG Healthcare's Locumsmart VMS, which provides access to 82 percent of the locum market. Useful, but CHG is simultaneously the industry's largest staffing company, commanding a 31 percent market share in locum tenens revenue. That is like asking Marriott to run the hotel industry's rate benchmarking service. The entity providing the marketplace is also the dominant seller in it.
Market Size
Original TAM calculation: Of the roughly 6,120 hospitals in the United States, approximately 3,800 spend more than $500,000 annually on locum tenens, the threshold where rate optimization generates meaningful ROI. At a tiered subscription of $599/month (rate benchmarking by specialty and geography) and $1,499/month (predictive forecasting, agency scoring, and contract optimization), with a 60/40 split, the blended ARPU is $959/month, yielding a base TAM of $43.7 million in annual recurring revenue.
A second layer targets the supply side: locum physicians seeking fair-rate verification. At $29/month targeting the roughly 22,000 full-time locum physicians, the supply-side SAM adds $7.7 million for a combined realistic SAM of $51.4 million. Year 3 target: 500 hospital subscribers plus 5,000 physician subscribers, totaling $7.5 million ARR.
One caveat that compresses the number: many of those 3,800 facilities belong to large health systems where locum procurement is centralized. HCA operates 186 hospitals, CommonSpirit has 142, and Ascension has 139. The actual number of buying decision-makers may be closer to 1,500, which drops the realistic TAM to $17.3 million. Health system consolidation cuts both ways: fewer buyers means each enterprise sale covers more facilities at once, and the deal sizes justify the 90-to-120-day B2B sales cycle.
The Product
Picture a CFO at a 300-bed hospital in Dallas. She gets a bill rate of $285/hour for a 90-day emergency medicine locum. She opens the rate compass, sees that $285 sits at the 82nd percentile for the DFW metro for that specialty, shift type, and contract duration. She calls the agency back. The rate drops to $245. That is $38,400 saved on a single placement, and her subscription costs $599 a month.
That is the core module: specialty-specific, geography-adjusted rate benchmarks built from anonymized transaction data contributed by participating hospitals. The CFO enters a pending requisition and sees exactly where the offered rate falls, broken out by percentile. This is what STR built for hotels, what Yardi Matrix built for apartments, what RealPage built for self-storage. Nobody has built it for physician staffing.
Around that core sits an agency scorecard (fill rate, time-to-fill, credentialing accuracy, and bill-rate consistency across anonymized hospital data), a rate forecast engine (predicting seasonal patterns like the annual residency graduation dip in late June, licensing policy changes from Interstate Medical Licensure Compact expansions, and demand surges from flu season or post-pandemic procedure backlogs), and a contract optimizer that calculates the all-in effective rate including travel stipends, guaranteed-hours penalties, and credentialing pass-through fees that agencies sometimes tuck into separate line items. The headline hourly rate is often not the real cost. This product makes it visible.
Unit Economics
| Metric | Value |
|---|---|
| Standard subscription (rate benchmarking) | $599/facility/mo |
| Premium subscription (forecasting + scoring) | $1,499/facility/mo |
| Blended ARPU | $959/mo |
| Customer acquisition cost | $8,500 |
| Expected LTV (36-month retention, 90% gross margin) | $31,071 |
| LTV:CAC ratio | 3.7:1 |
| Gross margin | 91% |
| Startup cost (18-month runway) | $4.2M |
| Break-even | 22 months |
Methodology note: The 36-month retention assumption comes from healthcare analytics SaaS benchmarks. Vizient, Premier, and ECRI retain hospital subscribers above 90 percent annually because benchmarking data embeds itself into procurement workflows and budget justification processes. Once a hospital's locum budget approval requires market rate verification, the data source becomes a workflow dependency with high switching costs. CAC of $8,500 reflects enterprise healthcare sales targeting the VP of Medical Staff or Director of Provider Recruitment, with CFO co-sign. Primary channels: AAPPR conferences, ASHHRA chapters, and regional health system purchasing collaboratives. LTV: $959 × 36 × 0.90 = $31,071. Payback: 8.9 months.
Go-to-Market
Phase 1 (months 1-9): Recruit 200 hospitals across three labor markets (Northeast corridor, Texas triangle, Pacific Northwest) to contribute anonymized transaction data in exchange for free benchmarks for 12 months. The data is anonymized at ingestion: no physician names, no patient data, no facility identifiers in the output. Simultaneously build a public rate transparency index from the 1.4 percent of listings that do disclose rates, augmented with CMS Physician Fee Schedule data as a floor reference.
Phase 2 (months 10-18): Monetize with Standard tier at $599/month. Expand to 600+ facilities across 12 markets. Integrate with hospital VMS platforms (Locumsmart, ShiftWise, AMN Passport, MedefisVMS) via API to pull transaction data from existing procurement workflows, reducing manual contribution friction.
Phase 3 (months 19-30): Launch Premium tier at $1,499/month. Open physician-facing product at $29/month. Approach GPOs (Vizient, Premier, HealthTrust) about embedding rate intelligence into their existing workforce analytics, which already cover pharmacy and supply chain but exclude contingent physician labor. Enterprise tier at $3,500/month for 10+ facility health systems.
The Competition
| Company | What It Does | Rate Intelligence? | Conflict of Interest? |
|---|---|---|---|
| Locumsmart (CHG) | VMS for locum requisitions | Shows what agencies offer, not whether the rate is fair | CHG has 31% locum market share |
| AMN Passport | Workforce solutions platform | Internal analytics for AMN placements only | AMN is the largest healthcare staffing firm |
| MedefisVMS | Contingent labor management | Order tracking and compliance, not rate analytics | Owned by a staffing consortium |
| Doximity | Physician professional network | Annual compensation report for permanent salaries, not locum bill rates | None |
| MGMA DataDive | Practice management benchmarks | Employed physician surveys, not locum rates | None |
| This startup | Vendor-neutral rate benchmarking | Core product: anonymized market intelligence by specialty and geography | None: pure analytics, no staffing revenue |
Every existing platform was built to execute transactions, not to inform pricing decisions. Locumsmart routes requisitions to agencies. It does not tell the buyer whether Agency A's rate is 30 percent above what Agency B charged a comparable facility in the same metro last quarter. Doximity and MGMA track permanent physician compensation, a fundamentally different dataset from locum bill rates, which incorporate agency margins, travel costs, malpractice premiums, and market-timing effects that salary surveys never capture. The structural conflict in a staffing-company-owned VMS creates a genuine, durable opening for an independent player.
Why Now
Locum tenens crossed the threshold from emergency staffing to permanent budget line item. CHG's 2025 report shows utilization up 25 percent year over year, with 94 percent of facilities having used it. When something is used by 94 percent of an industry, it stops being a contingency. CFOs now care about rate optimization the way they have always cared about drug and supply costs, because locum spending has graduated from an occasional emergency expense buried in a miscellaneous account to its own line item on the income statement, visible to the board and subject to the same scrutiny as every other major procurement category.
The physician shortage is worsening on a timeline everyone can read. The AAMC projects a shortfall of up to 86,000 by 2036. HRSA's estimate is 187,130 by 2037. Forty-two percent of active physicians are over 55. The Medicare GME cap has been frozen since 1997. Every year the shortage deepens, locum spending grows, and the cost of rate opacity compounds. A hospital overpaying by 15 percent on $2 million in annual locum spend loses $300,000. Multiply by 3,800 facilities, and the aggregate overspend from information asymmetry reaches roughly $1.1 billion annually.
Hospital margins are getting crushed in the right direction. The AHA's 2026 Costs of Caring report shows total expenses growing at 7.5 percent while prices grow at 3.3 percent. Becker's tracked 25 major health systems in 2025, with labor cost increases ranging from 3 percent (Bon Secours) to 11.8 percent (Kaiser). In a world where every other cost category has an optimization tool, physician contingent labor remains the conspicuous exception.
And the underlying data already exists. About 30 percent of healthcare providers use VMS/MSP platforms, with another 20 percent planning implementation within two years. These systems contain the transaction-level rate data a benchmarking product needs, but that data sits inside platforms owned by staffing companies with no incentive to surface it for buyers. The plumbing that would support an analytical layer already exists inside these platforms, but the intelligence product that turns transaction data into market benchmarks has never been built.
Original Contribution: The Agency Opacity Tax
A calculation nobody has published, and one that reframes the entire market opportunity. The U.S. locum tenens market is $9.6 billion (SIA, 2025). Agency administrative fees, the spread between hospital bill rate and physician take-home, range from 20 to 60 percent according to a 2023 PMC study on agency staffing and hospital financial performance. The median markup, cross-referenced from physician compensation surveys and agency financial disclosures, is approximately 35 percent. That puts about $2.5 billion of the total market in agency margin rather than physician compensation.
Not all of that margin is excess. Agencies do real work: credentialing, malpractice coverage, travel logistics, payroll. A reasonable cost-of-service estimate for those functions, benchmarked against professional staffing in legal, engineering, and IT, runs 15 to 20 percent. The gap between the reasonable service cost (17.5 percent midpoint) and the actual median markup (35 percent) is 17.5 percentage points. Applied to $9.6 billion, that gap represents approximately $1.68 billion annually in markup exceeding the cost of service delivery.
We call this the "agency opacity tax." It persists because hospitals cannot tell efficient agencies (charging 22 percent, cost-justified) from extractive ones (charging 55 percent, opacity-dependent). A rate intelligence platform that makes this spread visible does not eliminate agency margins. It compresses the variance, and if the platform moves the median markup from 35 to 27 percent, that saves $768 million across the U.S. hospital system annually. At a $43.7 million TAM for the platform itself, the value capture ratio is 57:1.
Who Gets Hurt
Rate transparency sounds unambiguously good until you think about who absorbs the compression. If hospitals start benchmarking and negotiating down agency bill rates, agencies have two choices: accept thinner margins, or preserve their margins by cutting the physician's take-home. History in adjacent industries, from travel nursing during the pandemic to IT staffing during the dotcom boom, strongly suggests they will do both, with physicians bearing the larger share of the compression because individual clinicians have less bargaining power than institutional agencies. In a market with 86,000 too few doctors, squeezing physician pay could push more clinicians away from locum work entirely, shrinking the available pool and ultimately hurting patient access in the communities that depend most on temporary coverage.
Small and specialized agencies are also at risk. A boutique firm that places psychiatrists in rural Appalachia operates on thin margins and fills assignments that the big agencies ignore. Rate transparency favors scale: the CHGs and AMNs of the world can absorb margin compression, invest in automation, and compete on volume. A 15-person shop in Knoxville serving six community hospitals cannot. If transparency drives consolidation in staffing, it could reduce competition and physician choice in precisely the markets where the shortage bites hardest.
There is also a deeper tension. The article's core analogy compares physician staffing to hotel rooms and marina slips. But a physician covering an overnight ER shift is not a commodity. Commoditizing the pricing of medical professionals raises ethical questions that do not apply to hotel yield management. In a severe shortage economy, above-cost-of-service markups may reflect genuine scarcity rents that serve an allocative function, directing physicians toward the hardest-to-fill assignments. Flattening those rents through transparency might equalize pricing while making the hardest jobs even harder to fill.
Limitations
The "35 percent median markup" is an estimate, not a measurement. No locum tenens agency publicly discloses its margin structure, which means the inputs to this calculation are derived from second-order sources rather than direct financial reporting, and the actual range of margins across specialties, geographies, and contract durations is wider than any single median can convey. The actual distribution is almost certainly bimodal: primary care placements in rural markets may carry lower markups (agencies accepting thinner margins to maintain supply relationships), while surgical subspecialties in competitive urban markets carry higher ones. A single median obscures a complex distribution.
The cold-start problem is harder in healthcare than in most industries. Hospital compliance departments, already stretched thin by HIPAA, Joint Commission, and CMS audits, may resist adding a data-contribution workflow even with anonymization. Every new data feed entering or leaving a hospital IT system requires a Business Associate Agreement review, a data governance committee sign-off, and an IT security assessment. These requirements are not trivial, and they typically add 3 to 6 months to onboarding per facility, inflating customer acquisition cost and delaying the path to critical data mass.
Anonymization in small specialties carries de-identification risk. If only two agencies place pediatric neurosurgeons in the Memphis metro, rate benchmarking data for that specialty and geography could be reverse-engineered to identify specific agencies or even individual physicians. The platform needs k-anonymity thresholds (suppressing benchmarks below a minimum number of contributing transactions) that will leave some specialty-market combinations unbenchmarkable.
Strongest Counterargument
CHG could kill this startup with a feature update. Locumsmart already processes requisitions for 82 percent of the locum market. It has the transaction data. It has the agency integrations. It has the hospital relationships. In 2024, CHG acquired Locumsmart outright after operating it as an independent brand since 2009, signaling that CHG intends to own the data layer.
A hospital considering a new rate intelligence subscription will reasonably ask: why pay $599 a month for benchmarking when my existing Locumsmart contract already shows me agency offers? The distinction between "what agencies offer" and "what the market rate actually is" requires procurement sophistication that many hospital buyers may not possess or prioritize. The VP of Medical Staff who manages locum procurement is typically a physician in an administrative role, not a procurement specialist. Her primary concern is filling the shift before the OR goes dark and the revenue loss starts compounding, and she has neither the time nor the procurement training to quibble over percentile rankings.
More fundamentally, if rate benchmarking becomes a valued buyer tool, Locumsmart could add a "market rate comparison" module at no additional cost, funded by the agency fees it already collects. The competitive moat for a standalone intelligence company is thin if the dominant VMS decides to compete. The bull case requires believing that CHG's structural conflict of interest creates a credibility gap that a vendor-neutral player can exploit. STR became essential to hotels precisely because STR did not operate hotels. That may matter, but it is a bet on buyer sophistication in a market that has tolerated conflicted intermediaries for decades.
The Bottom Line
American hospitals spent $9.6 billion on temporary physicians in 2025. Agency markups range from 20 to 60 percent. The buyer side has no benchmarking data. Every other major procurement category in hospital operations has been solved: drugs, devices, supplies, construction, real estate, even janitorial. Physician contingent labor is the $9.6 billion exception. The cold-start problem is real, the compliance overhead is substantial, and the dominant VMS could build this feature before a startup reaches critical mass. The question is whether a company owned by the industry's largest staffing agency will ever build a tool that genuinely helps buyers pay less.
What You Can Do
If you run medical staff services or physician recruitment at a hospital: pull your locum invoices from the past 24 months. Calculate the all-in cost per clinical hour by specialty, including not just the bill rate but also travel reimbursements, housing stipends, guaranteed-hours penalties for cancelled shifts, and credentialing fees that agencies sometimes break out as separate line items. Then compare that number across agencies for the same specialty in the same market. You will almost certainly find a 25 to 40 percent spread between your cheapest and most expensive agency for equivalent coverage. That spread is the opacity tax, and naming it is the first step toward negotiating it down.
If you are building a healthcare workforce analytics product: the locum tenens rate data inside VMS platforms is the most valuable untapped dataset in hospital labor economics. Nobody is aggregating it for the buyer. The first company to build a vendor-neutral, HIPAA-compliant rate intelligence product for this market will own a category that does not exist yet.
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