Rodney C. Diaz, M.D., F.A.C.S.


Residency Program Director

To see if Rodney C. Diaz is accepting new patients, or for assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).



Otolaryngology (ENT/Ears, Nose, Throat)


Otolaryngology - Head and Neck Surgery

Skull Base Surgery



Locations and Contact

General Otolaryngology Clinic

2521 Stockton Blvd.
Sacramento, CA 95817

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Additional Numbers

Physician Referrals

800-4-UCDAVIS (800-482-3284)

Clinical Interests

Dr. Diaz's clinical focus concerns the treatment of disorders of hearing and balance within the inner ear and skull base, including the management of acoustic neuroma and other tumors of the cerebellopontine angle and lateral skull base; the medical and surgical management of Ménière's Disease; the treatment of sensorineural hearing loss, including cochlear implantation; and the surgical management of superior semicircular canal dehiscence and other anomalies of the otic capsule. His clinical practice also encompasses the treatment of diseases of the middle ear, including surgery for chronic otitis media, cholesteatoma, otosclerosis, acquired and congenital hearing loss, and surgical repair of the tympanic membrane and ossicular chain.

Research/Academic Interests

Dr. Diaz's scientific research has evolved and now focuses on the development of techniques by which the hair cell depleted cochlea can be repopulated by pragmatic and functional hair cell like transplants. He has had many clinical research interests spanning a broad range of topics concerning hearing and balance function, including therapeutic trials of pharmacologic tinnitus suppression and management, evaluation of innovative methods of cost-effective ossiculoplasty, and institution wide evaluation of safety and risk factors in general otolaryngological procedures. He also has had an interest in the assessment, management, and reduction of educational gaps in otolaryngological training and of the longitudinal correlation of evaluative methods in medical and surgical residency applicants.


Head and Neck Surgery

Center/Program Affiliation

UC Davis Medical Group

Undergraduate School

B.A., UC Berkeley, Berkeley CA 1995

Medical School

M.D., UC Davis School of Medicine, Sacramento CA 1999


General Surgery, UC Davis Medical Center, Sacramento CA 1999-2000


Otolaryngology - Head and Neck Surgery, UC Davis Medical Center, Sacramento CA 2000-2004


Otology, Neurotology, and Skull Base Surgery, Michigan Ear Institute, Farmington Hills MI 2004-2006

Lifesaver Campaign Recipient, In recognition of services provided to our patients at UC Davis Health, 2016

American Academy of Otolaryngology-Head and Neck Surgery Foundation Honors Award, Recognizing meritorious service, 2014, 2015, 2016

Fellow, American College of Surgeons, Inducted ACS Clinical Congress, October, 2014

Inductee Best Doctors in America Best Doctors, Inc., 2011, 2013

Inductee Best Doctors Database Sacramento Business Journal, September, 2011

Inductee Best Doctors Database Sacramento Magazine, December, 2011

Resident Travel Award Association for Research in Otolaryngology Midwinter Meeting, Orlando, FL, 2003

Resident Travel Award American Academy of Otolaryngology-Head and Neck Surgery Annual Meeting, Orlando, FL, 2003

Overall Research Symposium Award Bay Area Residents' Research Symposium (BARRS) Kaiser Permanente Medical Center, Oakland, CA, 2003

Resident Research Award-Graduation Research Forum Department of Otolaryngology-Head and Neck Surgery UC Davis Medical Center, Sacramento, CA, 2003

Research Award, Department of Otolaryngology, UC Davis Medical Center, 2003

First Place, Bay Area Residents' Research Symposium in Otolaryngology, 2003

Graduation Award for Excellence in Otolaryngology, UC Davis, 1999

Goodarzi A, Toussi A, Garza N, Lechpammer M, Brodie H, Diaz RC, Shahlaie K. Internal Acoustic Canal Stenosis Due to Hyperostosis. J Neurol Surg B Skull Base. 2020 Jun;81(3):216-222. doi:10.1055/s-0039-1685530. Epub 2019 Apr 22.

Chin OY, Diaz RC. State-of-the-art methods in clinical intracochlear drug delivery. Curr Opin Otolaryngol Head Neck Surg. 2019 Oct:27(5):381-386. doi:10.1097/MOO.0000000000000566. PMID:31460985.

O’Brien DC, Robinson AD, Wang N, Diaz R. Transdermal lidocaine as treatment for chronic subjective tinnitus: A pilot study. Am J Otolaryngol. 2019 May-Jun;40(3):413-417. doi:10.1016/j.amjoto.2019.03.009. Epub 2019 Mar 18. PMID:30905472.

O’Brien DC, Squires LD, Robinson AD, Ramadan H, Diaz RC. A Multicenter, Cross-Sectional Assessment of Otolaryngology Knowledge Among Primary Care Trainees. Ann Otol Rhinol Laryngol. 2018 Sep;127(9):631-636.  doi:10.1177/0003489418784615. Epub 2018 Jun 28. PMID:29952655.

Hsieh TY, Timbang MR, Dedhia R, Diaz RC. Multifocal Sporadic Burkitt’s Lymphoma Involving Temporal Bone and Parapharyngeal Space. J Otol Rhinol. 2017;6(6). doi:10.4172/2324-8785.1000327.

Puscas L, Chang D, Lee HJ, Diaz R, Miller R. USMLE and Otolaryngology: Predicting Board Performance. Otolaryngol Head Neck Surg. 2017 June1;156:1130-1135. doi:10.1177/0194599817702874. [Epub ahead of print 2017 April 18].

Diaz RC. It is 2015: what is the best treatment for tinnitus? Curr Opin Otolaryngol Head Neck Surg. 2015 Oct;23(5):360.

Nakayama M, Masuda A, Ando KB, Arima S, Kabaya K, Inagaki A, Nakamura Y, Suzuki M, Brodie H, Diaz RC, Murakami S. A Pilot Study on the Efficacy of Continuous Positive Airway Pressure on the Manifestations of Ménière's Disease in Patients with Concomitant Obstructive Sleep Apnea Syndrome. J Clin Sleep Med. 2015 Oct 15;11(10):1101-7.

Gao J, Raghunathan VK, Reid B, Wei D, Diaz RC, Russell P, Murphy CJ, Zhao M. Biomimetic stochastic topography and electric fields synergistically enhance directional migration of corneal epithelial cells in a MMP-3-dependent manner. Acta Biomater. 2015 Jan;12:102-12.

Ivory R, Kane R, Diaz RC. Noise-induced hearing loss: a recreational noise perspective. Curr Opin Otolaryngol Head Neck Surg. 2014 Oct;22(5):394-8.

Rodney C. Diaz, M.D., F.A.C.S.