healthPlanDrugTier

This term is proposed for full integration into Schema.org, pending implementation feedback and adoption from applications and websites.

Thing > Property > healthPlanDrugTier

The tier(s) of drugs offered by this formulary or insurance plan.
Values expected to be one of these types
Text
Used on these types
HealthInsurancePlan
HealthPlanFormulary

Source

https://github.com/schemaorg/schemaorg/issues/1062