The Summary of Benefits and Coverage, usually called the SBC, is one of the best places to begin. HealthCare.gov describes the SBC as an easy-to-read summary designed to help consumers compare plan costs and coverage. CMS explains that it summarizes key plan features, including covered benefits, cost-sharing provisions, limitations, and exceptions.

The SBC is standardized, which makes it useful for comparing several plans without trying to interpret completely different marketing materials. It also includes standardized coverage examples that illustrate how the plan could handle certain common medical situations.

The SBC is not necessarily the complete contract. Use it as an overview, then move to the more detailed policy, certificate, evidence of coverage, benefit booklet, or other governing plan documents when you need the exact terms.

The premium is the amount you pay for health insurance coverage whether or not you use medical services. It is one part of the cost of a health plan, not the complete cost.

A plan with a relatively low premium may have a higher deductible or require greater cost sharing when you receive care. A plan with a higher premium may have lower cost sharing. The best comparison depends on how often you expect to use care, the services and prescriptions you need, and the financial risk you could comfortably absorb.

A deductible is the amount you pay for certain covered services before the health plan begins paying according to its cost-sharing rules. HealthCare.gov notes that some services can be covered before the deductible is met, and some plans have separate deductibles for particular benefits such as prescription drugs.

Family coverage can also use individual and family deductibles. Do not assume the single number displayed prominently in enrollment materials explains every deductible that could apply.

When reading your plan, ask:

• What is the individual deductible?
• Is there a separate family deductible?
• Which services are covered before the deductible?
• Is there a separate prescription drug deductible?
• Do in-network and out-of-network services use different deductibles?

Copayment

A copayment, commonly called a copay, is a fixed amount you pay for a covered service under the plan’s rules. Different services can have different copays.

Coinsurance

Coinsurance is a percentage of the cost of a covered service that you pay. HealthCare.gov explains that coinsurance commonly applies after the deductible has been satisfied, although the exact cost-sharing structure depends on the plan.

Hypothetical Example

Suppose a hypothetical plan has a $2,000 deductible followed by 20% coinsurance for a particular in-network service. After the applicable deductible has been met, a service with a $1,000 allowed amount could leave the member responsible for $200 in coinsurance, assuming no other policy provision changes the result. These numbers are illustrative only and are not national averages.

The out-of-pocket maximum is one of the most important numbers in a health plan. HealthCare.gov defines it as the most you have to pay for covered services in a plan year before the plan begins paying 100% of the costs of covered benefits under the applicable rules.

However, not every dollar you spend necessarily counts toward that maximum. HealthCare.gov notes that premiums, services the plan does not cover, and certain out-of-network expenses do not count toward the Marketplace-plan out-of-pocket limit.

A provider network is the group of facilities, doctors, suppliers, and other providers that have contracted with the health insurer or plan. Network rules can determine both where you receive care and what you pay.

HealthCare.gov explains that different plan types handle networks differently. HMOs and EPOs generally provide more limited out-of-network coverage, while PPOs commonly allow members to use out-of-network providers at additional cost. The actual plan terms control.

Before choosing a plan or scheduling non-emergency care, verify:

• Whether your doctors are in network.
• Whether your preferred hospital is in network.
• Whether laboratories and imaging facilities you use are in network.
• Whether out-of-network non-emergency care is covered at all.
• Whether different network tiers have different cost sharing.
• Whether specialist care requires a referral.

Provider directories can change, so confirm network status with the health plan when the distinction could materially affect your costs.

The benefit section tells you which categories of medical care are included and how cost sharing applies. Read individual categories rather than relying on a general statement that the plan provides medical coverage.

Common categories to examine include:

• Primary care visits.
• Specialist visits.
• Preventive services.
• Urgent care and emergency services.
• Hospital inpatient and outpatient services.
• Laboratory and diagnostic testing.
• Imaging services.
• Mental health and substance use disorder services.
• Rehabilitation and therapy.
• Maternity and newborn care where applicable.
• Durable medical equipment.
• Prescription drugs.

The exclusions and limitations section can be just as important as the covered-benefits section. A plan can cover a broad category of care while excluding particular services, limiting the number of covered visits, or imposing conditions on when a benefit is available.

Look for language involving:

• Services specifically excluded from coverage.
• Visit or treatment limits.
• Medical-necessity requirements.
• Experimental or investigational treatment provisions.
• Network restrictions.
• Prior authorization requirements.
• Requirements to use particular facilities, pharmacies, or suppliers.

Prior authorization is approval from the health plan that may be required before you receive a particular service or fill a prescription. It can also be called preauthorization, prior approval, or precertification.

HealthCare.gov notes that plans may require preauthorization for services, treatment plans, prescription drugs, or durable medical equipment. It also cautions that receiving prior authorization is not necessarily a promise that the plan will ultimately pay every cost associated with the service.

Check the plan before scheduled procedures, advanced imaging, expensive medications, specialty drugs, durable medical equipment, and other services for which authorization rules commonly appear in plan documents.

If you take prescription medication, do not stop after confirming that the plan includes prescription drug benefits. Check the formulary, also called the drug list. HealthCare.gov defines a formulary as the list of prescription drugs covered by the plan.

For each important medication, review:

• Whether the drug appears on the formulary.
• Which formulary tier applies.
• The applicable copay or coinsurance.
• Whether a separate prescription deductible applies.
• Whether prior authorization is required.
• Whether quantity limits or other utilization rules apply.
• Whether you must use particular pharmacies or specialty-pharmacy arrangements under the plan.

Drug coverage can change according to plan rules, so verify current formulary information rather than relying only on an older copy.

Medical bills can show one amount while the plan uses another amount to calculate benefits. The allowed amount is generally the amount recognized by the health plan for a covered service under its payment rules.

CMS explains that an Explanation of Benefits can show both the provider’s charge and the allowed charge, along with what the insurer paid and the amount shown as the patient’s responsibility.

This distinction becomes particularly important when reading coinsurance provisions because the percentage is commonly calculated using the plan’s allowed amount rather than simply the provider’s original billed charge.

An Explanation of Benefits, or EOB, is sent after a claim is processed. CMS emphasizes that an EOB is not a bill. It explains how the health plan handled the claim and what amount the plan says you may owe.

CMS identifies several common EOB fields:

• Date and description of the service.
• Provider charges.
• Allowed charges.
• Amount paid by the insurer.
• Amount shown as your responsibility.
• Claim or remark codes explaining how the claim was processed.

Compare the EOB with the provider’s bill. If the amounts do not make sense, contact the plan or provider before assuming the bill is correct.

A health plan can deny a claim because of eligibility rules, coverage provisions, missing information, medical-necessity determinations, or other plan requirements. A denial does not necessarily mean the process is over.

HealthCare.gov defines an appeal as a request for review of a decision that denies a benefit or payment. The available procedures and deadlines depend on the type of coverage and applicable law.

For many private-sector employer plans governed by ERISA, the U.S. Department of Labor explains that the Summary Plan Description or claims booklet should describe how claims and appeals work. DOL guidance also explains that participants generally have at least 180 days to appeal a denied health claim under the federal rules applicable to those plans, although different coverage arrangements can follow different procedures.

When reading your plan, identify:

• Where claims are submitted.
• How denials are communicated.
• The deadline for filing an internal appeal.
• What supporting information can be submitted.
• Whether more than one internal appeal level applies.
• What external review rights may be available after internal review.

You do not need to read every page in order from beginning to end before the policy becomes useful. A focused review can identify the sections most likely to affect your medical and financial decisions.

• Read the SBC first. Note the deductible, out-of-pocket limit, common copays and coinsurance, and major exceptions.
• Check your provider network. Verify important doctors, hospitals, laboratories, and pharmacies.
• Review the services you actually expect to use. Look up office visits, specialists, therapy, imaging, hospital care, maternity care, or other relevant benefits.
• Check prescription coverage. Look up important medications in the current formulary and note applicable restrictions.
• Identify authorization and referral rules. Know which services require plan approval before care.
• Read exclusions and limitations. Pay attention to services the plan does not cover or covers only under particular conditions.
• Find the claims section. Understand how a claim is processed and what information appears on the EOB.
• Find the appeals section. Record the procedures and deadlines for challenging a denial.
• Keep the full policy documents. The SBC is an overview, so preserve the detailed plan materials for questions that require exact contractual language.

Reading a health insurance policy becomes easier when you separate the plan into a few practical questions: what do you pay, which providers can you use, which services and prescriptions are covered, what restrictions apply, and what can you do if the plan denies payment? The SBC gives you the quickest overview, while the full plan documents provide the detailed rules.

Pay particular attention to the deductible, copays, coinsurance, out-of-pocket maximum, network, prescription formulary, prior authorization rules, exclusions, claims procedures, and appeal rights. Health insurance documents and legal requirements vary by plan and coverage type, so rely on your current plan materials for the final answer to a specific coverage question.

• Centers for Medicare & Medicaid Services, Summary of Benefits & Coverage & Uniform Glossary, accessed August 2026.
• HealthCare.gov, Summary of Benefits and Coverage, accessed August 2026.
• HealthCare.gov, Deductible, accessed August 2026.
• HealthCare.gov, Out-of-Pocket Maximum/Limit, accessed August 2026.
• HealthCare.gov, Health Insurance Plan & Network Types: HMOs, PPOs, and More, accessed August 2026.
• U.S. Department of Labor, Plan Information, accessed August 2026.
• U.S. Department of Labor, Filing a Claim for Your Health Benefits, accessed August 2026.
• Centers for Medicare & Medicaid Services, How to Read a Health Insurance Explanation of Benefits, August 25, 2026.