University of California, Riverside

School of Medicine

Clinical Faculty Biographies

Dr. Mikio Nihira

Health Sciences Clinical Professor - Obstetrics and Gynecology

Mikio Nihira

Medical Office

UCR Women's Health Clinic
19330 Jesse Lane, Suite 100
Riverside, Calif. 92508
(844) 827-8000

Academic Office

School of Medicine
University of California, Riverside
Riverside, Calif. 92521
If you are a patient, please do not use this email address.
Contact the medical office by telephone.

Education and Training

  • Fellowship, Urogynecology & Reconstructive Pelvic Surgery, Greater Baltimore Medical Center and University of Maryland, Baltimore, Maryland
  • Residency, University of California, Los Angeles, Los Angeles, California
  • Internship, University of California, Los Angeles, Los Angeles, California
  • M.D., University of California, Los Angeles, Los Angeles, California
  • M.P.H., University of California, Los Angeles, Los Angeles, California
  • B.S., Psychology, Amherst College, Amherst, Massachussetts


Dr. Mikio Nihira, M.D., M.P.H., is a clinical professor of obstetrics and gynecology at the UC Riverside School of Medicine.

Nihira was previously a professor in the departments of obstetrics and gynecology as well as geriatrics at the University of Oklahoma Health Sciences Center (OUHSC). He served as the fellowship director for female pelvic medicine and reconstructive surgery and was on multiple committees as well as chair of the Electronic Health Record Initiatives Committee.

Nihira helped develop multiple teaching materials, including computer-assisted instruction tools for teaching urogynecology to medical students, lucite bladder model and diagnostic cystoscopy training curriculum, and training residents to obtain informed consent using standardized patients.

After completing his undergraduate degree in psychology (magna cum laude) at Amherst University, Nihira earned a master's degree in public health from UCLA. He then went to the University of Kansas for medical school, but transferred back to UCLA after his second year. He completed the M.D. at UCLA and stayed there for his internship and residency. He then completed a fellowship in urogynecology and reconstructive pelvic surgery at the University of Maryland/Greater Baltimore Medical Center.

Nihira is a diplomate of female pelvic medicine and reconstructive surgery and general obstetrics and gynecology from the American Board of Obstetrics and Gynecology. He is a fellow of the American Congress of Obstetrics and Gynecology and the American College of Surgeons as well as a member of the American Urogynecologic Society, the Society for Simulation in Healthcare, the Society of Gynecologic Surgeons, the National Association for Continence, and the Association of Professors of Gynecology and Obstetrics.

Research Interests

Nihira's research interests include optimizing surgical training practices.  Most recently he facilitated development of an integrated Interstim training curriculum for female pelvic medicine and reconstructive surgery fellows.


  • Best Physician, Oklahoma Magazine, 2011, 2013, 2015.
  • Faculty Teaching Award, University of Oklahoma Health Sciences Center, 2007, 2008, 2009, 2011, 2013, 2014.
  • Academy of Teaching Scholars, University of Oklahoma Health Sciences Center, 2014.

Selected Publications

  • Hardré PL, Nihira M, LeClaire E, Moen M. Defining Expertise in Gynecologic Surgery: Perspectives of Expert Gynecologic Surgeons. Female Pelvic Medicine & Reconstructive Surgery. 2016 Nov 1;22(6):399-403.
  • Rostaminia, G., Pickett, S., Machiorlatti, M., Shoberi, S., Nihira, M. Surgeon preference for surgical treatment of stress urinary incontinence amongst urogynecologic surgeons, comparison after 15 years. Pelvicperineology 2015;34(3):75-78
  • Fenner, D., Zutshi, M., Lucente, V., Culligan, P., Nihira, M., & Mellgren, A. Long-term efficacy of the TOPAS (TM) system for the treatment of fecal incontinence. Neurology and Urodynamics 2015 (34):S127-S128).
  • Zutshi, M., Culligan, P., Fenner, D., Lucente, V., Nihira, M., & Mellgren, A. The TOPAS (TM) treatment for fecal incontinence: a closer look at complications. Diseases of the Colon and Rectum 2015;Vol. 58 (5):E113-E114.
  • Thompson, B. M., Sparks, R. A., Seavey, J., Wallace, M. D., Irvan, J., Raines, A., Nihira, MA, Lees, J.. Informed Consent Training Improves Surgery Resident Performance in Simulated Encounters with Standardized Patients. The American Journal of Surgery. 2015;210(3):578-584.
  • Santiago, AC, O’Leary DE, Quiroz LH, Nihira MA, Shobeiri SA. An ultrasound approach to the posterior compartment and anorectal dysfunction. International Urogynecology Journal. 2015; 215:26(9):1393-1394.
  • Moen, Michael MD; Walter, Andrew MD; Harmanli, Oz MD; Cornella, Jeffrey MD; Nihira, Mikio MD, MPH; Gala, Rajiv MD; Zimmerman, Carl MD; Richter, Holly E. PhD, MD; for the Society of Gynecologic Surgeons Education Committee. Considerations to Improve the Evidence-Based Use of Vaginal Hysterectomy in Benign Gynecology. Obstetrics & Gynecology. 2014; 124(3):585-588
  • Pickett, SD, Barenberg, B, Kantartzis, KL, Turner, LC, Miranne JM, Dune, TJ, Akl A, Vesely SK, Nihira, MA. Increasing Transparency at National Meetings: An Insight into Current Practices. The Journal of Minimally Invasive Gynecology. 2014;21(2): S5-S6
  • Collins, Sarah A. MD; Joshi, Girish MD; Quiroz, Lieschen H. MD; Steinberg, Adam C. DO; Nihira, Mikio A. MD, MPH Pain Management Strategies for Urogynecologic Surgery: A Review. Female pelvic Medicine & Reconstructive Surgery. 2014;20(6):310-315
  • LeClaire, EL, Nihira, MA, Hardre PL. Validity: applying current concepts and standards to gynecologic surgery performance assessments. Advances in Health Sciences Education. 2014:1-12
  • Allen AM, Shobeiri SA, Quiroz LH, Fong DN, Nihira MA. Obstetric laceration repair in the United States: is there a common practice? Journal of Reproductive Medicine. 2014;59(3-4):127-33.
  • Joshi, GP, Beck, DE, Emerson RH, Halaszynski TM, Jahr JS, Lipman AG, Nihira, MA, Sheth KR, Simpson MH, Sinatra RS. Defining New Directions for More Effective Management of Surgical Pain in the United States: Highlights of the Inaugural Surgical Pain Congress. The American Surgeon. 2014;80219-228.
  • Barenberg, BJ, Smith T, Nihira, MA. Compounded Estradiol Cream: A Cost Conscious Alternative. The Journal of the Oklahoma State Medical Association. 2014, April: 99-100
  • Nihira, MA, Quiroz, LH, Hardre, P, Allen, A, Shobeiri SA. Training Community Gynecologists to Perform Intraoperative Cystoscopy: A Competency-Based Training Experience. Female Pelvic Medicine & Reconstructive Surgery: 2014; 20(2):76-82
  • Shobeiri, SA, Yune, JJ, Quiroz, L, Siddighi, S, Nihira, MA. Transurethral bulking agent location and distribution: A 3D ultrasound analysis. NEUROUROLOGY AND URODYNAMICS 2013 32 (6), 550-552
  • Shobeiri SA, Rostaminia G, White D, Quiroz LH, Nihira MA. Visualization of vaginal pathologies by 3-Dimensional Endovaginal and Endoanal Ultrasonography: A Pictorial Essay. J Ultrasound Med 2013; 32:1499–1507.

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