There are other online brokerages, both large and small, that can help you sort out the individual market health insurance options available in your area. Most of them can show you plans that are available in the exchange as well as options that are only available outside the exchange (no subsidies are available outside the exchange, but as noted above, you're probably not eligible for subsidies anyway, if you have access to an employer-sponsored plan).
But it's also worth noting that if they keep the employer-sponsored plan for the whole family, the premiums will almost certainly be payroll deducted on the pre-tax basis. On the other hand, if they opt to buy an individual market plan, the premiums would only be tax deductible to the extent that they (along with other medical expenses) exceed 10 percent of the family's household income, and assuming that the family opts to itemize their tax deductions (increasingly rare now that the Tax Cuts and Jobs Act has greatly increased the standard deduction).
Humana group dental plans are offered by Humana Insurance Company, HumanaDental Insurance Company, Humana Insurance Company of New York, Humana Health Benefit Plan of Louisiana, The Dental Concern, Inc., Humana Medical Plan of Utah, CompBenefits Company, CompBenefits Insurance Company, CompBenefits Dental, Inc., Humana Employers Health Plan of Georgia, Inc., or DentiCare, Inc. (DBA CompBenefits).
These plans meet all the requirements of the health care law, including covering pre-existing conditions, providing free preventive care, and not capping annual benefits. If you have one of these plans, you won’t have to pay the fee that people without coverage must pay through the 2018 plan year. (Note: Starting with the 2019 plan year (for which you’ll file taxes in April 2020), the fee no longer applies.)
A good place to start is HealthCare.gov. This is the health insurance exchange created by the The Patient Protection and Affordable Care Act, and is a one-stop shop for private individual market health insurance plans (note that the exchange itself is run by the government, but the health plans for sale in the exchange are all private, from the health insurance companies with which you're already familiar). People in 39 states use HealthCare.gov to enroll in individual market plans. The other 11 states and the District of Columbia have state-run exchanges, and you'll be directed to their sites from HealthCare.gov when you select your state.
Humana group medical plans are offered by Humana Medical Plan, Inc., Humana Employers Health Plan of Georgia, Inc., Humana Health Plan, Inc., Humana Health Benefit Plan of Louisiana, Inc., Humana Health Plan of Ohio, Inc., Humana Health Plans of Puerto Rico, Inc. License # 00235-0008, Humana Wisconsin Health Organization Insurance Corporation, or Humana Health Plan of Texas, Inc., or insured by Humana Health Insurance Company of Florida, Inc., Humana Health Plan, Inc., Humana Health Benefit Plan of Louisiana, Inc., Humana Insurance Company, Humana Insurance Company of Kentucky, or Humana Insurance of Puerto Rico, Inc. License # 00187-0009, or administered by Humana Insurance Company or Humana Health Plan, Inc. For Arizona residents, plans are offered by Humana Health Plan, Inc. or insured by Humana Insurance Company. Administered by Humana Insurance Company.
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