Doctors affiliated with Mercy Cedar Rapids and The Iowa Clinic are refusing to sign paperwork their patients need to register for the Iowa Department of Public Health’s medical cannabis program. Iowa law requires applicants to obtain their doctor’s signature attesting that the patient has a “qualifying debilitating medical condition.” But the law stipulates that health care practitioners have “no duty to provide” written confirmation of the patient’s diagnosis.

Mercy Cedar Rapids appears to have instructed its 503 physicians not to sign the IDPH paperwork, according to two sources with qualifying conditions, who receive health care at different facilities in that network. Most if not all of the 250-plus health care providers at The Iowa Clinic, a doctor-owned group in the Des Moines area, are also refusing to sign medical cannabis card applications.

Without cooperation from a primary care provider, Iowans cannot start the process of receiving authorization to use cannabidiol legally. The number of patients affected by their health care group’s policies is unknown but potentially large. Mercy Cedar Rapids handled 451,400 outpatient visits last year at offices around Iowa’s second largest metro area. The Iowa Clinic averages 450,000 visits annually, serving about 148,000 unique patients across its central Iowa locations.