The Division of Public Health said Thursday that anyone who received spinal or joint injections from the providers after May 21 should watch for signs of illness and contact their doctor immediately if they become sick.
No illnesses in Delaware have been linked to New England Compounding Center medications.
The specialty pharmacy has been at the center of investigations into more than 250 fungal meningitis cases. The death toll rose Thursday to 20.
The health care providers are: Advanced Eye Care; Anesthesia Providers; Bayhealth Medical Center; Beebe Medical Center; Richard Bonder, MD; Christiana Health System; Glasgow Medical Center; Lewes Surgery Center; Pain Center of Delaware; Precision Pain and Rehab; St. Francis Hospital; and Swier Clinic.