The COVID-19 pandemic has certainly changed the face of medicine over the past (almost) two years. When adding the increase of older Americans in need of healthcare, health insurance stock seems like a worthwhile investment.In the most recent quarter, health insurance companies performed exceedingly well, and in particular Anthem Inc. (NYSE:ANTM), UnitedHealth Group Inc. (NYSE:UNH) and, Molina Healthcare Inc. (NYSE:MOH).Anthem Inc.Anthem, one of the largest private health insurance organizations nationwide, recently entered into an agreement to buy Integra Managed to enrich its Medicaid business portfolio and primarily target low-income individuals. The latest economic downturn wherein people witnessed job losses and reduction in income saw more people becoming eligible for Medicaid coverage.The company had strong third-quarter earnings which beat estimates and rose 61.7% year-over-year with growth largely driven by the increase in revenue from Medicaid and Medicare. Molina Healthcare Inc.Molina Healthcare has seen consistent growth in its revenue base over the past several years. The company has been gaining from the restructuring and profitability improvement plan which started back in 2017. The plan included streamlining of organizational structure to improve efficiency as well as the speed and quality of decision-making.As of September 30, 2021, membership growth witnessed a 20% year-over-year increase, attributable to well-performing Medicare, Medicaid, and Marketplace businesses. The same can be expected to rise on the back of contract wins and strategic initiatives.UnitedHealth Group Inc.In recent surveys, most Americans said they are prepared to select a health plan during this year’s open enrollment season, while the COVID-19 pandemic continues to spur interest in virtual care for medical services and digital fitness apps to help people pursue at-home fitness routines. UnitedHealth Group provides a wide range of health care products and services, such as health maintenance organizations (HMOs), point of service plans (POS), preferred provider organizations (PPOs), and managed fee-for-service programs.UNH, a #3 (Hold) stock, was added to the Focus List on June 22, 2015, at $120.33 per share. Since then, shares have increased 284.46% to $462.62. Earnings in the third quarter outperformed estimates and rose 28.8% year-over-year and are expected to grow 11.6% for the current fiscal year.To start investing today, click HERE.