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Dr. Nick Rigas is from Grand Rapids, MI. He studied medicine at Michigan State University College of Osteopathic Medicine. After completing his internship and residency (Otolaryngology Facial Plastic Surgery) at Botsford Hospital, His fellowship was St. Vincent Hospital in Head and Neck Surgical Oncology. He is Board Certified by the American Osteopathic College of Otolaryngology / Head and Neck Surgery. Dr. Rigas joined CENTA's Sinus & Allergy Center in 2010.

Along with his patients he is dedicated to the education of medical students, residents, and practicing physicians alike. He is a clinical trainer, lecturer, and mentor at the Marion School of Osteopathic Medicine. He is the residency coordinator for the practice and trains family medicine residents from Community South and East and St. Vincent Hospitals and dental students and oral surgery residents from Indiana University.  Recently, he was the recipient of an award for his dedication to resident training from the Community Westview (now Community South) Family Medicine Program (2015, 2016). Dr. Rigas serves on the educational committee for the American Osteopathic College of Otolaryngology / Head and Neck Surgery. Finally, He holds several leadership positions;. He is the President of CENTA, and chaired the ENT Department of St. Vincent’s Hospital in Indianapolis.


His dedication to compassionate and comprehensive care defines his practice.  Engaging in cutting edge practice for Sinus & Allergy patients, he was among the first to routinely do in-office balloon based sinus surgery to treat sinus headaches, nasal polyps, and chronic sinus infections in the office, allowing patients a quicker recovery time.


Dr. Rigas loves spending time with his family; when not taking care of patients, he enjoys exercise, watching movies, and trying new restaurants. Dr. Rigas welcomes new patients to the practice and is available for consultation

P. Nick Rigas, D.O.


  • Sinus & allergy diseases

  • Otolaryngology/ Head and Neck Surgery


  • American Osteopathic College of Otolaryngology

  • Head and Neck Surgery

Hospital affiliations

  • St. Vincent Health Network

  • Surgery Center of Carmel

  • IU North

  • IU West

  • Community Health Network (North and East)

Medical School

University College of Ostopathic Medicine


Otolaryngology / Head and Neck Surgery 

Botsford Hospital, Grand Rapids, Michigan


Botsford Hospital, Grand Rapids, MIchigan


Head & Neck Cancer and Reconstructive Surgery

St. Vincent Hospitals, Indianapolis


Center for Ears, Nose, Throat & Allergy

Sinus & Allergy Center

Professional Memberships

American Osteopathic Association (AOA)


American Osteopathic Colleges of Ophthalmology and Otolaryngology-Head and Neck Surgery (AOCOOHNS)


American Academy of Otolaryngology/Head & Neck Surgery (AAOHNS)


“I was seen by Dr. Nick Rigas for my newly diagnosed tongue cancer at the CENTAClinic. My husband and I were so very pleased to have this opportunity. It "fast tracked" my treatments due to the ability to see all of the specialties I would need in my treatment. Everyone from ENT surgeon, radiologist, medical oncologist to dentist. Within two hours, we had a treatment recommendation. It would have taken several more weeks of numerous physician visits and for them to all communicate to have my treatment recommendation. What a blessing to have it in two hours! I was able to then start treatments a week later. I finished my chemotherapy and radiation a year ago this past January and am in remission. I think the prompt care I received at the CENTA Clinic helped make my good outcome possible. I have recommended CENTA Clinic to many people and will continue to do so."