At Henry Mayo Newhall Hospital, we are committed to providing compassionate care for women through every stage of their lives. Our OB-GYN team offers personalized healthcare for women with a focus on their individual needs.

To make an appointment at Henry Mayo OB-GYN, call 661.200.1720. 

Henry Mayo OB-GYN, Valencia

Meet our Provider

 Dr. Don Nishiguchi Henry Mayo OB-GYN Santa Clarita

Don J. Nishiguchi, M.D.

Dr. "Nish" is a board certified obstetrician/gynecologist and has been in private practice for over 20 years in Santa Clarita. He is a graduate of University of Southern California, Ohio State University Medical Center, and the USC Keck School of Medicine Obstetrics/Gynecology program.

His knowledge, caring demeanor, and empathy are well known among his patients. His patients tell us that Dr "Nish" is a type of doctor who will "hold their hands."

Dr. Nishiguchi’s interests are general and high-risk obstetrics, contraception, infertility diagnosis and treatments, Poly Cystic Ovarian Syndrome, pap smear issues as well as Premenstrual Tension Syndrome.

He also focuses on the diagnosis and treatment of irregular menses, osteoporosis and menopausal issues and offering benign and cancerous gynecologic surgeries including minimally invasive procedures in hysterectomy, myomectomy and laparoscopy.

For women who are suffering with very heavy menses, Dr. Nishgiuchi offers minimally invasive endometrial ablation to minimize further bleeding.

Contact Us

Tel: 661-200-1720

27871 Smyth Drive #102

Valencia, CA 91355

Our Hours

Monday through Friday 9 a.m. to 5 p.m.

Upcoming Events

  • Nov
    19
    Tuesday
    1:00 PM - 2:00 PM
    This series of classes led by healthcare experts in Parkinson's will cover a variety of topics relevant to those diagnosed with Parkinson's and their family members.
  • Nov
    19
    Tuesday
    6:00 PM - 7:00 PM
    This webinar will include a discussion of the newest treatment options and therapies, presented by Henry Mayo and Keck Medicine of USC Urologist Kian Asanad, MD. All you need to join is an email address.
  • Nov
    20
    Wednesday
    10:00 AM - 11:00 AM
    Mindfulness meditation is a mental training practice that teaches you to slow down racing thoughts, let go of negativity, and calm both your mind and body.