Did you know about the slippery condition before she fell, or was it brand new ice that formed right before she got there? That matters a lot. The previous answer touches on negligence, which is the core issue, but it's worth clarifying: you're not automatically liable just because someone gets hurt on your property. What matters is whether you breached a duty of care - meaning you either created a hazard, knew about one and did nothing, or should have known about it and failed to warn her or fix it. If your front steps were just naturally icy that morning and she slipped, that's different from if you'd left them untreated for weeks while knowing they get dangerous.
Your relationship with her also factors in. Since she's your friend, you had a higher duty to keep her safe than you would for a random trespasser, but less of a duty than you'd have for someone you explicitly invited to do business. The fact that she was a social guest visiting your home puts you in the middle ground. Your homeowner's insurance will likely cover this if there's a legitimate claim, and honestly, that's what it's for. Don't ignore her medical situation - reach out, express concern, and let your insurance company handle the claim if she files one. Fighting liability informally might backfire; let the pros evaluate it.