Know what your individual and family deductibles and out-of-pocket maximums are

Below is the definition of deductibles and out-of-pocket maximums:

Not all items are equal in being included in your deductible and out-of-pocket maximum:

What counts towards your deductibleWhat does not count to your deductible
Generally anything listed as “after deductible” in your plan document. Only the money you pay counts, not what the insurer also contributedCo-pays (Though co-pays do count towards out-of-pocket maximums)
Generally anything where you don’t pay a co-pay (flat fee)Routine vision and dental work since that is covered by a separate insurance plan
Medications may be covered by a separate Pharmacy Benefit Manager (PBM). (Though medications may count towards out-of-pocket maximums)
Premiums
Be aware that payments towards out-of-network providers are counted in an entirely separate bucket. The deductibles and out-of-pocket maximums for out-of-network care are often much higher
Anything covered by your insurer at 100%
Balance billing by the provider
Procedures that are denied by your insurer, such as experimental treatments, cosmetic surgery, procedures deemed unnecessary by your insurer

Family health insurance plans often have both an individual deductible and a family deductible/out-of-pocket maximum.

Individuals are allowed to continue spending towards their individual deductibles and out-of-pocket maximums, until the combined dollar amount for the entire family reaches the family deductible or out-of-pocket maximum. At that point all further medical care for all individuals is either paid at the coinsurance amount after the family deductible has been met, or nothing at all if the family out-of-pocket maximum has been met.