Doctor Info

General Dentistry

Dr. Robert P. Zernicke, D.D.S.

Dr. Zernicke grew up in Nevada and received his bachelors degree at the University of Nevada. Dr. Zernicke was the sole recipient of the State of Nevada’s scholarship fund awarded for scholastic achievement which gave him the opportunity to attend Dental School at the University of Southern California. He has been practicing dentistry since 1990 both in Southern California and here in the Salinas area since 1996. Dr. Zernicke is trained in all phases of Dentistry from cosmetics to endodontics. He is available weekdays and evenings. Speaks Spanish.

Member of American Dental Association
Member of California Dental Association

Dr. Stephen L. Reddy, D.D.S.

Dr. Reddy grew up in Southern California and received his bachelors degree from LA Sierra College. After attending Loma Linda University Dental School, he spent 5 years in the Army Dental Corp including a 1 year general practice residency. He has been practicing dentistry in Salinas since 1986. He is available weekdays, weekends and evenings.

Member: American Dental Association, California Dental Association, American Academy of Oral and Maxillofacial Pathology

Dr. John D. Verdugo, D.D.S.

Dr. Verdugo is from Tucson AZ where he received his education, graduating in 1970 with a Chemical Engineering Degree. He worked for Chevron for three years before entering UOP School of Dentistry. Since his graduation in 1976, he has practiced in the Monterey-Salinas area and has continued his professional education in Endontics, Implantology, and Restorative Dentistry. He is available weekdays, weekends and evenings. Speaks Spanish.

Dr. Sonu Madan, D.D.S.

Dr. Sonu Madan is a Board certified dentist practicing since 1996. She earned her Bachelors in Dental Surgery from DAV (C)  Dental College (India). After graduation, she completed her residencies in Oral and Maxillofacial surgery and General Dentistry.

She has worked for various leading dental practices in the Bay Area. She is a member of the American Dental Association and California Dental Association.

Dr. Maden has a unique passion for dentistry and here patients and their needs. She is committed to advanced education and staying at the forefront of dental technology. Dr. Maden is available weekends. She also speaks Hindi and Ponjabi.

Dr. Walters
Dr. Walters is an experienced orthodontist with over 40 years of practice. He earned his undergraduate and dental degrees from the University of Minnesota and served as a dentist in the U.S. Navy aboard the USS Hornet, an aircraft carrier. He received his orthodontic specialty training from the University of Washington in Seattle, Washington. Dr. Walters has taught clinical orthodontics for over 20 years and is a “returning” staff member at the University of Pacific Arthur A. Dugoni School of Dentistry in San Francisco on two Tuesdays each month. Dr. Walters is also a Diplomate of the American Board of Orthodontics and is a member of a number of professional organizations including:

ADA American Dental Association
CDA California Dental Association
SDDS Sacramento District Dental Society
AAO American Association of Orthodontics
PCSO Pacific Coast Society of Orthodontists
CAO California Association of Orthodontists
PORG Peninsula Orthodontic Research Group
Angle E. H. Angle Orthodontic Society
ACPA American Cleft Palate Association

Dr. Walters has also severed as a volunteer on numerous Central and South American Missions as a clinician treating patients with facial clefts.

He has enjoyed his chosen profession and recently returned to active practice after a short time in semi-retirement. “I love my work too much to stay on the side-lines when there are so many exciting developments in Orthodontics. Re-entry has allowed me to completely update my practice including the appliances and techniques we use.”

Oral Surgery

Joerg Wittenberg, M.D., D.D.S.

Dr. Joerg Wittenberg holds a Medical Degree and is also a board Certified Oral and Maxillofacial Surgeon.

Dr. Wittenberg received his medical training at the University of Bonn in Germany. Dr. Wittenberg received his further education from the university of Pacific in San Francisco and and his specialty degree from the Louisiana State University.

Dr. Wittenberg completed a fellowship in cosmetic surgery. He has also spent one year in an accredited cosmetic surgery fellowship. Furthermore, Dr. Wittenberg has performed multiple craniofacial surgeries and achieved extensive experience in facial aesthetic surgery. . Dr. Wittenberg is on staff at Hazel Hawkins Hospital in Hollister, and Natividad Medical Center in Salinas, California.

Dr. Wittenberg holds a Medical Degree and is also a board Certified Oral and Maxillofacial Surgeon. Dr. McBride has been practicing oral and maxillofacial surgery in the Hollister, California area for over twenty years. He is also a Clinical Assistant Professor in the Department of Oral and Maxillofacial Surgery at University of California San Francisco. Dr. Wittenberg is available evenings. Speaks German.

Our staff is highly trained and qualified to handle all of your needs. We invite you to come in for a consultation.

Education Medical Degree:

  • University of Bonn, Germany
  • D.D.S., University of the Pacific San Francisco
  • D.M.D., Louisiana State University
  • Board Certified Oral and Maxillofacial Surgeon


  • American Academy of Cosmetic Surgery
  • American Medical and Dental Association
  • American Association of Oral and Maxillofacial Surgeons



Israel Trujillo, D.D.S, A.P.D.C.
Dr. Trujillo is a native of Salinas, and brings tremendous training with a B.S. degree in Molecular, Cellular, and Developmental Biology from the University of California, Santa Cruz. He received his D.D.S. from the University of California, Los Angeles, and then stayed at UCLA to complete his Specialty in Periodontal Surgery and Implantology.

Over the past 6 years he has conducted research in oral pathology and bioengineering at UCLA. His research has focused on the diagnosis and treatment of oral desquamative lesions (e.g. Lichen Planus), as well as the fabrication of composite scaffolds capable of the controlled delivery of growth factors.

Dr. Trujillo recently received the “Clinical Periodontal Therapy Award” from the California Society of Periodontists. He is an active member of the following organizations:

  • American Academy of Periodontology
  • California Society of Periodontists
  • Hispanic Dental Association
  • California Dental Society
  • American Dental Association

In addition to being fluent in Spanish, Dr. Trujillo’s expertise also includes training in IV and Oral Sedation, which is readily available to patients in our office. Dr. Trujillo also has had extensive training in the analysis of Advanced 3D imaging.