Out-of-Pocket Cost Modeling
The price a hospital charges and the amount you actually pay are very different numbers. Our OOP calculator models your specific insurance plan to estimate your true patient cost.
Why Out-of-Pocket Matters
Over 55 million Americans are enrolled in high-deductible health plans (HDHPs) where the deductible exceeds $1,600 for individual coverage or $3,200 for family coverage. For these consumers, the difference between a $15,000 procedure and a $25,000 procedure directly impacts their wallet -- potentially by thousands of dollars -- depending on where they are in their deductible and what their coinsurance rate is.
Even on traditional PPO plans, the out-of-pocket cost for a major procedure can vary significantly between in-network facilities due to different negotiated rates. Our OOP model takes the facility-specific negotiated rate and runs it through your plan's benefit design rules to show what you would actually owe.
Benefit Design Components
The OOP calculator models the following plan design elements:
Deductible
The amount you must pay out of pocket before your insurance begins to cover costs. We track both individual and family deductibles, and accept your year-to-date deductible spend as an input so the estimate reflects your current position. If you have met $1,200 of a $2,000 deductible, only the remaining $800 is applied before coinsurance kicks in.
Copay
A fixed dollar amount per service visit, common for office visits and ER visits. For hospital procedures, copays are less common than coinsurance, but some plans apply a flat copay for outpatient surgery. When present, the copay is applied after the deductible has been satisfied.
Coinsurance
The percentage of costs you share with your insurer after the deductible. A typical plan might have 80/20 coinsurance, meaning the insurer pays 80% and you pay 20% of the allowed amount after your deductible. On a $20,000 procedure with a fully met deductible and 80/20 coinsurance, your share would be $4,000. We model both in-network and out-of-network coinsurance rates separately.
Out-of-Pocket Maximum
The absolute ceiling on what you can be required to pay in a plan year. The 2026 ACA out-of-pocket maximum is $9,450 for individual coverage and $18,900 for family coverage. Once your cumulative deductible + copays + coinsurance reaches this cap, the plan pays 100% of remaining costs. We accept your year-to-date OOP spend to accurately model how close you are to this ceiling. For expensive procedures, this cap can make the price difference between facilities irrelevant -- if you are going to hit your max either way, the cheaper hospital does not save you money.
Network Status
In-network and out-of-network benefits often have entirely separate deductibles, coinsurance rates, and OOP maximums. An out-of-network facility may also balance bill you for the difference between their charge and the insurer's allowed amount, though the No Surprises Act limits this for emergency and certain other services. Our model flags when a facility is likely out-of-network for common payers and shows the OOP difference.
The Calculation Flow
Given a procedure, a facility, and your plan parameters, the OOP engine runs the following steps:
- Look up the facility's negotiated rate for the procedure (combined facility + professional fee).
- Determine your remaining deductible:
max(0, deductible - ytd_deductible_spend). - Apply the remaining deductible to the procedure cost. The portion up to the remaining deductible is 100% patient responsibility.
- Apply coinsurance to the remainder:
coinsurance_rate x (procedure_cost - deductible_applied). - Cap at the OOP maximum:
min(total_patient_cost, oop_max - ytd_oop_spend). - Return the final patient cost, broken down by deductible portion, coinsurance portion, and any OOP max savings.
Plan Design Impact Analysis
Different plan architectures produce dramatically different OOP costs for the same procedure. We model three common plan archetypes to illustrate the impact:
| Plan Type | Deductible | Coinsurance | OOP Max |
|---|---|---|---|
| HDHP + HSA | $3,200 | 80/20 | $8,050 |
| Traditional PPO | $500 | 80/20 | $6,000 |
| Bronze ACA | $7,000 | 60/40 | $9,450 |
For a $20,000 knee replacement at the start of the plan year, the HDHP member would pay $6,560, the PPO member $4,400, and the Bronze ACA member $9,450 (hitting the OOP max). These differences are why facility price comparison alone is insufficient -- plan design determines who benefits most from shopping.
Related API Endpoints
/v1/compare/v1/procedures/:code/prices/v1/report