Critical care specialists in Oklahoma

Critical care physicians and nurse practitioners care for the most seriously ill patients in intensive care units.

It depends on your plan. HMO plans (including many Medicare Advantage HMOs) usually require a referral from your primary care provider; PPO plans usually don't. Check your plan documents or call the number on your insurance card.

Doctors contract with specific insurance networks, not entire insurance companies — and sometimes only at certain offices. Once you've found a few options here, check them in your insurer's online directory or call the member services number on your card, then confirm with the office when you book.

Under HIPAA you have a right to a copy of your records, usually within 30 days of asking. Contact the practice's medical records department and make your request in writing. Our free guide walks through the process and includes a request letter template.