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Dr. Richard R Riker, MD

Where I Provide Care

Primary Office
100 Foden RD W STE 103
South Portland, ME  04106
Fax: 207-828-0188
Map & Directions
Maine Medical Center - Portland
Dr. Richard R Riker, MD

Richard R Riker, MD

Internal Medicine | Critical Care Medicine | Pulmonary Disease
I am a Professor of Medicine at Tufts University School of Medicine. I no longer provide outpatient care at Chest Medicine Associates. All clinical activity is inpatient care via Chest Medicine Associates at Maine Medical Center ICU (Medical CCM and Neuro CCM) Phone: 207-662-2179, Fax: 207-662-6326 or at Mercy Hospital ICU.

Research Roles at Maine Medical Center
• Mentor, MaineHealth Institute for Research (MHIR) Summer Research Program 1995-Present
• MMC Institutional Review Board 1997-2018, Vice-Chair 2009-2013, Chair 2014-2018
• Instructor – Maine Medical Center Clinical Research Course 2006-Present
• Community Engagement, Bioethics, Outreach Core Co-Lead, Center of Biomedical Research Excellence in Acute Care Research and Rural Disparities P20GM139745 2021 - Present
Language(s) Spoken

Education & Credentials

Education & Credentials

Board Certification

  • Critical Care Medicine, 1991
  • Internal Medicine, 1989
  • Pulmonary Disease, 1990


  • Maine Medical Center, Pulmonary Disease, 1991


  • Northwestern Memorial Hospital, Emergency Medicine, 1988

Medical School

  • University of Vermont College of Medicine, 1984
Hospital Affiliation
  • Maine Medical Center since 1992
  • MaineHealth Accountable Care Organization since 1994