NashobaServices and Clinical Centers


Nashoba Valley Medical Center urologists provide expert evaluation and diagnosis for men and women coping with urological conditions. We offer state-of-the-art treatments, both surgical and non-surgical, to treat a full range of urological diseases and conditions, including:

  • Benign prostate hyperplasia (BPH)
  • Incontinence and pelvic floor disorders
  • Conditions of the urinary tract including infections
  • Erectile dysfunction/impotence
  • Kidney disorders
  • Male infertility
  • Overactive bladder
  • Stones (bladder, kidney and ureteral)
  • Urologic cancers (bladder, kidney, prostate and testicular)

Noninvasive Treatment for Kidney Stones

For patients suffering from kidney stones, Nashoba now offers lithotripsy, a nonsurgical treatment that uses high-energy shock waves to break kidney stones into tiny pieces. These pieces are then easily passed with urine. Nashoba Valley Medical Center Urologists, Stefan Karos, MD, and Kevin Tomera, MD, work alongside highly skilled technologists to perform this procedure, which uses the latest technology available.

The benefits to patients who have lithotripsy include:

  • Lower complication rates
  • Greater success rates in breaking up the kidney stone
  • Reduced procedure time
  • Shorter recovery period

Depending on the size and location of the kidney stone will determine what type of treatment option is best for a patient.

Meet the Urology Team

Dr. Tomera
Kevin Tomera, MD

Dr. Karos
Stefan Karos, MD


Steward Medical Group - Division of Urology
Nashoba Valley Medical Center
90 Groton Road
Ayer, MA 01432
Phone: 978-784-9972

Connect with Steward

Visit Our Twitter Feed Visit Our Facebook Page Visit Our YouTube Channel Email This Page Print This Page

Subscribe to our patient e-newsletter

Copyright © 2015 Steward Health Care
Connect Healthcare Panacea CMS Solutions