Lost Rivers Medical Center featured on an episode of PBS show Life on the Line!


Appointments are preferred but you are welcome to visit the clinic on a walk-in basis and we will see you as soon as possible. We provide a family practice physician along with a nurse practitioner.

Mackay Clinic is a primary care clinic where you can get general doctor’s office services. We treat all types of patients and age groups with a wide range of illnesses and conditions. If you need additional care we can refer you to a visiting specialist.

At the clinic our providers strive to keep you healthy. We promote preventive medicine, so we can avoid illness and hospitalizations for you. In addition to providing care when patients are ill, we stress education by offering vaccines for children; CDL physicals; school/sports physicals; lab testing and family planning.

Call today for an appointment. We are accepting new patients and have convenient times to fit your busy schedule. Same day appointments are usually available.

Mackay Clinic


(208) 252-7656


(208) 588-2997

Clinic Hours

Tuesday 9:00 am - 5:00 pm
Wednesday 9:00 am - 5:00 pm
Thursday 9:00 am - 5:00 pm

Physical Address

313 E. Custer Mackay, ID 83251

Mailing Address

PO Box 145 Arco, ID 83213

As a National Health Service Corps site, we promise to:

Serve all patients

Not deny services based on a person’s:

• Race
• Disability
• Color
• Religion
• Sex
• Sexual Orientation
• National origin
• Inability to pay

Offer discounted fees for patients who qualify

Accept insurance, including:

• Medicaid
• Children’s Health Insurance Program (CHIP)
• Medicare


We accept Medicaid, Medicare, private insurance, self pay and sliding scale. Please remember to bring your insurance card and a photo ID to your first appointment. If you are insured, your co-pay must be paid at the time of service. If you are responsible for your bill, payment in full is due at the time of services. If you are uninsured, payment arrangements need to be made prior to appointment.

Billing Inquiries

For questions about your Mackay Clinic bill, please call our billing department (208) 252-7654 ext 103 or 105 during office hours, Monday through Friday, 9:00 a.m. to 4:30 p.m.