What Is Health Insurance — and What Does It Actually Cover?

Health insurance is a contract between you and an insurer: you pay a regular premium; they pay (up to a limit) for medical expenses incurred due to illness or accident. That is the simple definition. The complicated part — the part that catches most people off-guard — is understanding exactly what is covered, how much is covered, and under what conditions.

The core components of a health insurance policy

Sum Insured

The maximum amount the insurer will pay in a policy year. ₹5 lakh is the most common — and for most urban Indians, dangerously inadequate. A moderate surgery and 5-day ICU stay in a tier-1 city can exceed ₹3–4 lakh. A serious illness can exceed ₹10–20 lakh.

Premium

What you pay annually for the coverage. Determined by sum insured, age, city, family size, and whether it is an individual or floater plan.

Deductible / Co-pay

Some policies require you to pay a percentage of every claim (co-pay) or a fixed amount first (deductible). A 20% co-pay on a ₹5 lakh claim means you pay ₹1 lakh and the insurer pays ₹4 lakh.

Network Hospitals

Cashless claims are only available at hospitals in your insurer's network. Outside the network, you pay first and seek reimbursement later.

Waiting Period

Most policies have a 30-day waiting period for any claims. Pre-existing conditions typically have a 2–4 year waiting period before they are covered. This is why buying health insurance when you are healthy matters enormously.

Individual plan vs. family floater — which should you choose?

A family floater covers all family members under a single sum insured — typically at a lower combined premium than individual plans. The risk: if one member exhausets the cover (a major surgery, for instance), the family has limited coverage for the rest of the year. For families with older members or members with chronic conditions, individual plans may be safer.