The ACLU of Kansas and Western Missouri filed the lawsuit Tuesday in Kansas City, Kan. It claims the Kansas law is unconstitutional in part because it prohibits women from buying insurance coverage for all of their health needs and doesn't place a similar restriction on men.
The lawsuit seeks an injunction against the Kansas law, which went into effect last month.
The law prohibits insurance companies from offering abortion coverage as part of their general health plans, except when a woman's life is at risk.
Under the new law, individuals and employers in Kansas who want abortion coverage will have to buy supplemental policies covering only abortion.