Short answer, not really. Whether you’re headed for Tel Aviv’s coastline or a week in Jerusalem, your insurance card from home isn’t going to get much of a reaction at an Israeli hospital desk. Israeli facilities generally don’t bill US insurers directly, and many will ask you to pay before you leave. Whether any of that money comes back depends on the plan you have.
Employer plans. Some cover emergencies abroad, usually by reimbursing you afterward once you send in itemized bills. Some don’t cover anything outside the US. Look for the words “out of country” or “international” in your plan documents, or just call the number on your card before you fly.
Marketplace plans. Individual plans bought through the exchanges are built around US networks, and most offer little or nothing overseas.
Medicare. Outside the United States, Medicare generally doesn’t pay, apart from a few narrow exceptions that almost never apply to a trip to Tel Aviv. A few Medigap plans add a small foreign travel emergency benefit, with its own deductible and a lifetime limit.
This is exactly why travel medical coverage for Israel exists. It’s inexpensive compared to one ER visit, it’s built to work abroad, and the good plans include medical evacuation, which your regular plan almost certainly won’t.
So before you’re riding the train up to Haifa, spend five minutes checking your coverage. It’s the least fun part of trip planning and the one you’ll be glad you did.