why hca has better margins then uhs?

There are six distinct reasons why HCA structurally earns better margins than UHS, and they compound on each other. Let me go through each one.

1. Payer Mix — The Single Biggest Driver

This is the root cause of almost everything else. Who pays you determines how much you get paid per patient, and the difference between payers is enormous.

For HCA's inpatient business, approximately 43–45% of revenue comes from private/commercial insurance, ~40% from Medicare (including Medicare Advantage), and only ~17% from Medicaid, with a small fraction as self-pay.

Now compare this to UHS. UHS's acute care segment has a broadly similar mix to HCA, but its behavioral health segment — which represents roughly 43% of total revenue — is structurally dominated by Medicaid. Behavioral health patients are disproportionately lower-income, government-insured individuals. Medicaid pays far less than commercial insurance per patient day, and behavioral health stays are long (averaging 10–14 days inpatient), meaning UHS collects a low daily rate for a long time.

The arithmetic is unforgiving. HCA fills beds mostly with commercially insured patients at premium rates. UHS fills beds with a large share of Medicaid behavioral health patients at below-cost rates. Every incremental Medicaid patient dilutes the average revenue per admission and therefore the margin.

2. Service Line Mix — High-Acuity Procedures vs. Long-Stay Behavioral

This is the second structural dimension. Not all hospital revenue is created equal — what type of care you provide matters enormously for margins.

HCA's acute care hospitals perform high volumes of surgical procedures: cardiac surgery, orthopedics, neurosurgery, oncology. These are high-acuity, short-stay, high-revenue events. A cardiac bypass surgery generates tens of thousands of dollars in revenue in 3–5 days. Commercial insurers pay premium rates for these procedures. HCA's case mix index has been trending higher, with a slight uptick in complex service utilization, and along with favorable payer mix helped lift inpatient revenue per equivalent admission by approximately 6% year-over-year in 2025.

UHS's behavioral health division does the opposite — it provides long-stay, lower-acuity care (psychiatric stabilization, addiction treatment) reimbursed on a per-diem basis at rates set by Medicaid. A behavioral health patient staying 12 days at $500/day generates $6,000 in revenue. An orthopedic surgery patient staying 2 days generates $25,000+. The fixed cost of staffing both beds is not proportionally different. This is why behavioral health, despite being a higher-margin business than other hospital services from an operational standpoint, produces lower margins than HCA's acute surgical business in absolute dollar and percentage terms.

3. Scale and Purchasing Power — HCA Is in a Different League

HCA benefits from scale advantages that enable centralized purchasing, unified technology platforms, and strong negotiating leverage with commercial payers across its 190+ hospitals in 20 states.

The numbers make this concrete. HCA's revenue is ~$75 billion — more than 4x UHS's ~$17 billion. When HCA negotiates with a medical supply company for IV bags, sutures, or imaging equipment, it is the single largest buyer in the country. It extracts pricing that smaller systems literally cannot access. The same applies to:

• Commercial insurer contract rates — HCA has enough market share in its local markets that insurers must include it in their networks. This gives HCA pricing power most systems lack.
• Pharmaceutical purchasing — bulk buying through HealthTrust, HCA's group purchasing subsidiary, which also serves third-party hospitals and generates additional fee revenue.
• Technology platforms — HCA's revenue cycle, EHR, and analytics systems are amortized across 190 hospitals, making the per-hospital cost trivial compared to what a 25-hospital system pays for comparable tools.

UHS at $17 billion is a large company by any normal standard, but in negotiations with Humana, UnitedHealth, or Cardinal Health, it is not in the same room as HCA.

4. Revenue Cycle Excellence — HCA Collects More of What It Bills

This is less visible but enormously impactful. Revenue cycle is the process of billing insurers, following up on denials, appealing underpayments, and collecting patient balances. The difference between excellent and average revenue cycle management is typically 1–3 percentage points of revenue — which on $75 billion translates to $750M–$2.25 billion.

HCA has been aggressively deploying AI across its revenue cycle operations, targeting faster cash conversion, fewer billing denials, optimized staffing, and improved patient throughput. Specifically, AI tools are being used to predict which claims will be denied before submission (so they can be corrected in advance), automate prior authorization workflows, and prioritize collection efforts by probability of recovery.

HCA's CFO highlighted "greater success on dispute resolution with payers" as a meaningful contributor to the 6.1% revenue per equivalent admission growth in Q3 2025. In plain English: HCA is getting better at winning fights with insurers over claim denials. Georgetown University

UHS's behavioral health revenue cycle is inherently more complex and lower-yield. Medicaid denials in behavioral health are notoriously high, appeal processes are slower, and the per-claim economics don't justify the same investment in automation and dispute resolution that HCA applies to its high-value surgical claims.

5. Labor Cost Structure — Galen Changes the Math

Labor is 55–60% of all hospital costs. Even a 1% improvement in labor efficiency as a percentage of revenue moves the margin needle materially.

HCA's acquisition of Galen College of Nursing and now the College of Health Care Professions is not just a feel-good workforce story — it is a structural cost advantage. HCA's contract labor expense was "basically flat" year-on-year at 4.2% of total labor costs by late 2025, down from pandemic-era peaks — a direct result of having a proprietary pipeline of nursing graduates. Galen feeds HCA hospitals with new nurses who sign employment agreements as part of their training, reducing dependence on travel nurses who cost 1.5–2x the rate of staff nurses.

UHS's behavioral health staffing model has different challenges — it requires high ratios of psychiatric nurses, social workers, and therapists who are scarcer than general acute care nurses. These specialists command premium wages and are harder to pipeline through a nursing college model. UHS relies more heavily on market-rate hiring for this specialized workforce, which keeps labor costs structurally higher relative to revenue generated.

6. Geographic Concentration — Sun Belt Markets vs. UHS's Broader Footprint

HCA made a deliberate strategic choice decades ago to concentrate in high-growth Sun Belt markets — Texas, Florida, Tennessee, Nevada, Colorado. These markets share several margin-friendly characteristics:

• Younger, commercially insured population — younger workers use employer insurance, not Medicaid or Medicare
• Lower unionization rates — labor costs are structurally lower in right-to-work Sun Belt states
• Population growth — rising patient volumes without proportional cost increases creates operating leverage
• Favorable regulatory environment — these states generally impose lighter CON (certificate of need) restrictions, making it easier for HCA to expand capacity when volumes grow

UHS's behavioral health hospitals, by contrast, are spread across all 50 states, with significant concentration in markets that reflect the geographic distribution of the Medicaid-dependent population.

The Combined Effect — A Margin Waterfall

Here is how the gap accumulates across the P&L:

The irony is that UHS's behavioral health business — while a margin drag relative to HCA's surgical mix — is actually quite attractive compared to other behavioral health competitors and provides a genuine moat. The problem isn't that behavioral health is a bad business. It's that it structurally cannot produce the same margins as a concentrated, commercial-heavy, high-acuity surgical hospital network. HCA built itself into the most favorable corner of the hospital industry. UHS built itself into a different corner — important, defensible, but inherently lower-margin.