Caduceus


Our Physicians


























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James A. Cunningham, MD
Roland N. Chen, MD
Randall George Nixon, MD
Michael Sheehan, RNFA, MSN, NPc

James A. Cunningham, MD

James A. Cunningham, MDDr. Cunningham received his medical degree from Indiana University of Medicine in Indianapolis in 1989. He completed an internship at University of Southern California Medical Center. He performed his residency in general surgery, followed by his residency in urology, both at USC Medical Center. Dr. Cunningham joined Carson Urologists, Ltd. in 1995.

James A. Cunningham, MD is involved in advancing the field of urology including presenting papers at professional urological assemblies. He has served as staff surgeon of Planned Parenthood Vasectomy Clinic, and in 1984 served as a volunteer in a medical expedition to Bogota, Colombia. Dr. Cunningham is certified by the American Board of Urology.

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Roland N. Chen, MD

Roland N. Chen, MDDr. Chen joined Carson Urologists in June 2000. He offers special expertise in minimally invasive surgeries of the urinary tract. In 1997, he served as chairman of a video presentation on laparoscopic procedures to the 14th World Congress of Endourology, held in Scotland. Dr. Chen is certified by the American Board of Urology.

Dr. Chen received his medical degree from Temple University in Philadelphia in 1990. He was a prize-winning essayist while in college, as well as the recipient of several other academic awards. He served his residency in urology at the Cleveland Clinic Foundation, and was the recipient of the George and Grace Crile Traveling Fellowship. He was awarded a fellowship in endourology from the James Buchanan Brady Urological Institute at Johns Hopkins University in Baltimore in 1996.

Roland N. Chen has multiple publications to his credit and often presents his research on BPH, oncology, and surgery at professional conferences and post-graduate courses. He is a reviewer for the professional publications in the field of urology, The Journal of Endourology and for Urology.

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Randall George Nixon, MD

Randall George Nixon, MDDr. Nixon received his medical degree from the University of Washington School of Medicine in 1998. He performed his internship and urologic residency at Vanderbilt University Medical Center. Dr. Nixon was Chief Resident, Department of Urologic Surgey in Nashville, Tennessee in 2002-2003. He is also licensed in Nevada and California. Dr. Nixon joined Carson Urologists, Ltd. in 2003 and is certified by the American Board of Urology.

View more on Dr. Nixon.

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Michael Sheehan, RNFA, MSN, NPc

Michael ZebulonMichael joined Carson Urologists, Ltd. as a part of our team in January of 2011 and has been an integral part of providing and improving our quality patient care. Michael graduated with a BSN from William Carey College on the coast of Mississippi in 1999. He went on to earn his RNFA in 2001 and his MSN in 2005. He is a nationally certified family nurse practitioner. He has completed the initial courses for becoming a Doctor of Nursing Practice and is in the process of completing his doctoral education.

Michael's philosophy of care is grounded in the nursing model and he treats each patient through the lived experience of their health and aims to care for the whole individual.

There may be times where you will be treated by Michael instead of one of the Urologists – Dr. Cunningham, Dr. Chen, or Dr. Nixon.

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1425 Vista Lane
Carson City, NV 89703
Tel: 775.883.1030
Toll Free: 800.207.5004
Fax: 775.884.6232
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