Health insurance terms that actually matter

Health insurance is sold on price and used on terms, and the gap between the two is where most unpleasant surprises live.

The cost terms

Which interact and are frequently confused.

Premium: what you pay to hold the policy, regardless of use.

Deductible or excess: what you pay before the insurer contributes.

A low premium with a high deductible is a bet that you will not need much care.

Copayment: a fixed amount per service.

Coinsurance: a percentage of the cost after the deductible.

Out-of-pocket maximum: the annual ceiling on what you pay, after which the insurer covers everything.

This is the single most important protective term and is frequently overlooked in favour of the premium.

The honest comparison between policies requires modelling a bad year rather than a typical one, since insurance exists for the bad year.

Network

Where the largest surprises originate.

In-network providers have negotiated rates with the insurer; out-of-network providers have not.

Using an out-of-network provider can mean paying the difference between the billed charge and what the insurer allows, which can be very large.

The classic trap: an in-network hospital where the anaesthetist, radiologist, pathologist or assistant surgeon is not in network, producing a separate bill.

Several jurisdictions have introduced surprise billing protections covering exactly this situation, and knowing whether they apply to you is worth the ten minutes.

Networks change during a policy year, so confirming a provider's status shortly before treatment rather than relying on a directory matters.

Authorisation and referral

Administrative requirements with financial consequences.

Prior authorisation means the insurer must approve certain services in advance, and proceeding without it can mean no cover at all.

Referral requirements mean specialist care must be arranged through a primary clinician in some plan types.

Get authorisation in writing, with a reference number, and keep it.

Note that authorisation is not a guarantee of payment in many policies, which is a distinction worth reading.

Exclusions

What is not covered, which varies enormously.

Pre-existing conditions, with rules that differ dramatically between countries and markets — some prohibit exclusion entirely, others apply waiting periods or permanent exclusions.

Chronic condition management, which many private policies limit or exclude, covering acute episodes rather than ongoing care.

Cosmetic procedures.

Fertility treatment, frequently limited.

Mental health, where parity rules exist in some jurisdictions and coverage remains uneven.

Dental and optical, which are usually separate products.

Experimental or unproven treatments.

And travel or treatment abroad.

The questions to ask before buying

A checklist.

What is the out-of-pocket maximum, and what counts towards it?

Are my current clinicians and hospitals in network?

Are my current medications on the formulary, and at what tier?

What are the waiting periods?

How are pre-existing conditions handled?

Is chronic condition management covered?

What requires prior authorisation?

What is the process for appealing a denial?

And what happens if I move, change job or travel?

Appealing a denial

Where persistence pays.

Denials are common and a meaningful proportion are overturned on appeal, which most people never attempt.

The process: request the denial reason in writing with the specific policy provision cited; obtain supporting documentation from the treating clinician, including medical necessity justification; submit an internal appeal within the deadline; and escalate to external review where available, which exists in many jurisdictions and is frequently free.

Keep a record of every call with names, dates and reference numbers, which is the single most useful practice in any dispute.

Deadlines are strict and missing them forfeits the right, so acting promptly matters more than acting perfectly.

Where public provision exists

Worth stating.

In countries with universal public healthcare, private insurance is generally supplementary — buying speed, choice and comfort rather than access to essential care.

Which changes the calculation entirely: the question becomes whether the waiting time and choice are worth the premium, not whether you can obtain treatment.

And employer-provided cover in these systems is a benefit rather than a necessity, with tax implications in some countries.

General information only, not financial or insurance advice. Policy terms and regulation vary enormously by country — read your policy documents and seek independent advice.