Two studies by the National Women’s Law Center have found that many insurance companies are still charging for birth control, exploiting loopholes that may take years to close. From Jezebel:
In two “State of Coverage” reports … the NWLC found that many major insurers are ignoring the ACA’s new rule that FDA-approved birth control methods should be covered without a co-pay. Insurers do things like putting all hormonal birth control methods together into one category, then pay for just one or two of them. Others don’t cover sterilization, although it’s an approved birth control method that some women might choose, or impose arbitrary age limits, refusing to cover birth control for women over 50. (Which raises the question: do they think women are continuing to take birth control after 50 for the hell of it? Presumably they’re doing it because they can still get pregnant and would rather not.)
The NWLC also found that insurers are putting odd limits on things like maternity leave and breastfeeding supplies, things that are also supposed to be well-covered under the ACA. (Those odd limits include things like refusing to cover more than one ultrasound for a pregnant person; most people get at least two, possibly more if there are complications.)
You can read the reports here.