Amended by sections 10905 of the Manager’s Amendment and 1406 of HCERA. Imposes an aggregate, non-deductible annual fee on health insurers of $8B in 2014, $11.3B in 2015 and 2016, $13.9B in 2017 and $14.3B in 2018, subsequently indexed to the rate of premium growth. Allocates the fee by insurers’ relative market share of net premiums written in the preceding year, factoring in half of those between $25M and $50M and fully considering those over $50M. For entities that are exempt from tax under section 501(a) of the Internal Revenue Code and qualify under paragraph (3) (generally, a charity), (4) (generally, a social welfare organization), (26) (generally, a high-risk health insurance pool) or (29) (a consumer operated and oriented plan (CO–OP), considers 50 percent of the net premiums written – after the application of relevant thresholds above – for those exempt activities in computing the entity’s market share. Exempts from the fee self-insured plans, governmental entities, voluntary employer benefit associations and non-profits generating more than 80 percent of gross revenues from government programs that serve low-income, elderly or disabled populations. Effective in 2014.