210 ILCS 25/7-101
A clinical laboratory shall examine specimens only at the request of (i) a licensed physician, (ii) a licensed dentist, (iii) a licensed podiatric physician, (iv) a licensed optometrist, (v) a licensed physician assistant, (v-A) a licensed advanced practice registered nurse, (vi) an authorized law enforcement agency or, in the case of blood alcohol, at the request of the individual for whom the test is to be performed in compliance with Sections 11-501 and 11-501.1 of the Illinois Vehicle Code, (vii) a genetic counselor with the specific authority from a referral to order a test or tests pursuant to subsection (b) of Section 20 of the Genetic Counselor Licensing Act, or (viii) a pharmacist in accordance with Section 43.5 of the Pharmacy Practice Act. If the request to a laboratory is oral, the physician or other authorized person shall submit a written request to the laboratory within 48 hours. If the laboratory does not receive the written request within that period, it shall note that fact in its records. For purposes of this Section, a request made by electronic mail or fax constitutes a written request.
210 ILCS 25/7-101