Urology Specialists in Orange County, CA

At Southland Urology, we are committed to providing the best care care to men and women suffering from a variety of urologic conditions. Our team of highly skilled and experienced urologists have years of experience in treating conditions such as erectile dysfunction, stress urinary incontinence, overactive bladder, and many others.

Patients living in Anaheim, Fullerton, Yorda Linda, Garden Grove and nearby cities can rest assured that they are receiving the best urology care in the area at our clinic. We pride ourselves on our expertise and use it to guide our patients through the process of diagnosis and treatment. We strive to educate our patients about their condition and help them make informed decisions about their health.


Michael Gazzaniga, MD, FACS

Dr. Michael Gazzaniga is a board-certified urologist of Southland Urology. Since joining Southland Urology in 2002 Dr. Gazzaniga has been the recipient of Orange Coast Magazine’s “Physician of Excellence” award, as voted on by his peers within the Orange County Medical Association. He has received this distinction from 2006 to 2020.







Eric Tygenhof, MD, FACS

Dr. Eric Tygenhof is board-certified, and a member of the American Urologic Association, the Western Section American Urologic Association, the California Urological Association, the Endourological Society, and the Society of Robotic Surgery.




Harjivan S. Kohli, MD

Dr. Harjivan Kohli is a board-eligible urologist with Southland Urology. He graduated with Alpha Omega Alpha honors from the Oakland University William Beaumont School of Medicine and completed his training in urologic surgery at Lahey Hospital & Medical Center, one of the nation’s top training programs.


  • daVinci Robotic Surgery
  • Urolift
  • Rezum
  • Transurethral Resection of the Prostate (TURP)
  • Laser Enucleation (HoLEP)
  • Aquablation
  • Robotic Simple Prostatectomy


Alan Weinberg, MD, FACS(emeritus)

Alan C. Weinberg, MD, FACS is He is board-certified and three times recertified and is also a Fellow in the American College of Surgeons. He has also been the recipient of multiple awards over many years, including “Top Doctors in America,” Orange County Medical Association “Physician of Excellence,” and named often in “Top Urologists in America.”