Infectious Disease Associates

Contact Us

Infectious Disease Associates
2850 North Ridge Rd, Ste 102
Ellicott City, MD 21043

Google Map

Phone 410-418-8550

Infectious Disease Associates exterior location


  • B. Mark Landrum, M.D.
  • Robert W. Ross, M.D.
  • Angela Kopack, M.D.
  • Prashanth Santhekadur, M.D.
  • Eyad Cheikh, M.D.
  • Mihaela Carter, M.D.


  • Antibiotic management
  • Antibiotic-resistant bacterial infections
  • Hepatitis C
  • HIV / AIDS
  • Lyme disease
  • Orthopedic infections
  • Post-operative infections
  • Travel medicine

Location Overview

Infectious Disease Associates (IDA), a member of Johns Hopkins Regional Physicians, is an infectious disease practice that primarily provides inpatient infectious disease coverage for Harbor and St. Agnes Hospitals, and Johns Hopkins Howard County Medical Center . Largely to provide follow up care after discharge, the providers staff one ambulatory location in Elkridge where they treat adult patients. Dr. Landrum is point for antibiotic stewardship at JHHCMC. He also collaborates with Dr. Maragakis on JHM infection control preparedness and response.

IDA treats patients with illnesses caused by infections, including those with recurrent infections related to immunosuppression medications for transplants, HIV or cancer treatments.

Make an Appointment

New Patients

Streamline your visit by downloading the new patient intake forms.
Call 410-418-8550 for an in-person appointment.

Existing Patients

Contact our office at 410-418-8550 to schedule or request an appointment.

It is very important that patients keep their appointments or give us at least 24 hours notice of their need to either cancel or reschedule. The missed appointment fee with insufficient notice is $60.