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Photo of Callahan, Nicholas

Nicholas Callahan, MPH, DMD, MD

Assistant Professor

Oral and Maxillofacial Surgery



UIC College of Dentistry 801 S. Paulina St, Chicago, IL 60612



Dr. Callahan is an Assistant Professor of Oral and Maxillofacial Surgery. Most recently, Dr. Callahan completed a Fellowship in Head and Neck Oncology and Microvascular Reconstructive Surgery at the University of Maryland at Baltimore Medical Center. He received his medical school education and General Surgery training at SUNY Downstate, and his Oral and Maxillofacial Surgery training at Kings County Hospital Center in Brooklyn, New York. He attended the University of Pittsburgh School, of Dental Medicine for his dental school training, and also received his Masters of Public Health degree at the University of Pittsburgh Graduate School of Public Health.

Clinical activities & specialties

Dr. Nicholas Callahan is a surgeon in the Department of Oral & Maxillofacial Surgery at UI Health. Dr. Callahan specializes in treating patients with both benign and malignant pathologies of the head and neck. He specializes in both removal of tumors and reconstructions of the defects, and he also manages maxillofacial trauma. Dr. Callahan is educated both in medicine and dentistry, and he is fellowship-trained in head and neck oncologic surgery and microvascular surgery.

Selected Publications

Selected Peer-Reviewed Research

Callahan N, Markiewicz M, Miloro M. Immeidate Reconstruction of the Infraorbital Nerve after Maxillectomy: Is it Feasible? Journal of Oral and Maxillofacial Surgery. Accepted for Publication.

Palla B, Suhaym O, Majeed N, Garzon S, Callahan N, 2020. Spindle cell variabnt squamous cell carcinoma of the oral cavity: Case presentation and review of literature. Oral and Maxillofacial Surgery cases, p.100174.

Palla B, Han M, Callahan N, 2020. Myositis Ossificans Traumatica of the Head and Neck in a Child. Journal of Dentistry for Children. Accepted for publication.

Ebben S, Hussain RA, Miloro M, Callahan N. The UIC COVID Coverage Protocol: A Technical Note for Pandemic Oral and Maxillofacial Surgery Call Coverage. Journal of Oral and Maxillofacial Surgery. 2020 Apr 10

Hawkins A, Ponnusamy S, Markiewicz M, Callahan N. Use of a Foley Catheter in the Drainage of Deep Space Maxillofacial Infections. British Journal of Oral and Maxillofacial Surgery 2019. Accepted for publication.

Vieira AR, Deeley KB, Callahan NF, Noel JB, Anjomshoaa I, Carricato WM, Schulhof LP, Desensi RS, Gandhi P, Resick JM, Brandon CA, Rozhon C, Patir A, Yildirim M, Poletta FA, Mereb JC, Letra A, Menezes R, Wendell S, Lopez-Camelo JS, Castilla EE, Orioli IM, Seymen F, Weyant RJ, Crout R, McNeil DW, Modesto A, Marazita ML. Detection of Streptococcus mutans Genomic DNA in Human DNA Samples Extracted from Saliva and Blood. ISRN Dentistry. 2011, Article ID 543561.

Küchler EC, Menezes R, Callahan N, Costa MC, Modesto A, Meira R, Patir A, Seymen F, Paiva KB, Nunes FD, Granjeiro JM, Vieira AR. MMP1 and MMP20 Contribute to Tooth Agenesis in Humans. Archives of Oral Biology. 2011 May; 56(5): 506-11.

Callahan N, Modesto A, Deeley K, Meira R, Vieira AR. TGFA, Human Tooth Agenesis, and Evidence of Segmental Uniparental Isodisomy. European Journal of Oral Sciences. 2009 Feb; 117(1): 20-26.

Callahan N, Modesto A, Meira R, Seymen F, Patir A, Vieira AR. Axis inhibition protein 2 (AXIN2) polymorphisms and tooth agenesis. Archives of Oral Biology. 2009 Jan; 54(1): 45-9.

Selected Book Chapters

Mortland T, Callahan N, Markiewicz M (2019) Oral Cancer. In: Peterson’s Principles of Oral and Maxillofacial Surgery 4th Edition.  Editors: Miloro M. Springer: In preparation.

Callahan N, Lubek J, Dylaram D. (2019) Principles of Mandibular Reconstruction with Vascularized Flaps. In: Regenerative Strategies for Maxillary and Mandibular Reconstruction. Editors: Melville J, Shum J, Young S, Wong M. Springer:201-210.


  • Fellowship in Head and Neck Oncology & Microvascular Surgery - University of Maryland Medical Center, July 2018
  • Certificate in Oral and Maxillofacial Surgery - Kings County Hospital Center, June 2016
  • General Surgery Internship Certificate - SUNY Downstate Medical Center, June 2014
  • Medical Doctor - SUNY Downstate Medical School, June 2013
  • Doctor of Medical Dentistry - University of Pittsburgh School of Dental Medicine, May 2010
  • Master of Public Health - University of Pittsburgh Graduate School of Public Health, May 2010
  • Bachelor of Science, Biochemistry - Trinity College, May 2006

Licensures and Certifications

  • North East Regional Board of Dental Examiners, 2010
  • Advanced Trauma Life Support, 2013 - 2018
  • Advanced Cardiac Life Support, 2010 - Present
  • Pediatric Advanced Life Support, 2015 - 2017
  • Basic Life Support, 2000 - Present
  • American Association of Oral and Maxillofacial Surgery, 2009 - Present
  • American Dental Association, 2006 - Present

Research Currently in Progress

Dr. Callahan has strong clinical and research interests in oncology and reconstructive surgery and  he brings extensive training in transoral robotic assisted surgery (TORS). He also has an interest in maxillofacial trauma demographic and outcomes. He has participated in the NIH Clinical and Translational Sciences Institute Start-Up Program, and he was a Howard Hughes Medical Institute Research Scholar. Dr. Callahan has numerous abstract presentations and publications.