Large employers are required to offer health benefits to full-time workers and to their dependent children, or face a penalty. However, large employers are not required to offer health benefits to the spouses of full-time workers, so your employer would not have to pay a penalty for refusing to offer coverage to your spouse. A large employer is one that employees at least 50 workers.
Because your spouse is not offered health benefits through your job, s/he may be eligible to apply for coverage and premium tax credits through the Marketplace.
Browse more questions in the Employer-Sponsored Health Coverage section.