Welcome to Riverwalk OBGYN

Overall patient rating:

In 1979 Tristan Castaneda, MD started with a simple premise: Make available to every woman the health resources she needs to live a healthy, active, and long life. At the same time, educate each woman about the importance of preventative health measures. This same idea still drives us today, some 30 years later. The track record we’ve accumulated over the years speaks to our commitment to patients, their families, and the community at large. Both our medical and office staffs are second to none, who genuinely take an interest in individual patient’s needs. We think you’ll notice the difference immediately when you step foot inside our doors. We’d love to see you today to map out a health and wellness plan that’s tailored to your health history and needs.

About Our Practice

  • Providers

  • Services

  • Links And Forms

  • Locations

  • Contact Us

  • Alka Arya Degaetano

    DO
  • Ricardo Munoz

    MD
  • Stephanie Schaefer

    MD
  • Christina Simpson

    MD
  • Heather Williams

    MD

We Provide The Following Services

  • Obstetrics + Reproduction
  • Pregnancy Care and Delivery
  • Contraception
  • Ultrasound and Imaging
  • Gynecology + Wellness
  • Annual Exams
  • Menopause
  • Urogynecology

Riverwalk OBGYN: San Antonio Office

  • Monday: 8:30AM - 5:30PM
  • Tuesday: 8:30AM - 5:30PM
  • Wednesday: 8:30AM - 5:30PM
  • Thursday: 8:30AM - 5:30PM
  • Friday: 8:30AM - 5:30PM

Send Us a Message

    Patient Reviews

    Overall patient rating for Riverwalk OBGYN:

    Office Visit / Follow-up

    I trust my doctor. Confident that he is sincerely caring and concerned about my optimal health.

    Hysterectomy

    Dr. Simpson is a very knowledgeable and compassionate doctor and I was very comfortable knowing she was going to be my surgeon. Dr. Simpson also prayed over me before the surgery which meant the world to me. I highly recommend Dr. Simpson.

    Office Visit / Follow-up

    Doctor always takes time to answer my questions and give me excellent care. No question is to small.

    Annual Well Woman Exam

    Dr. Muñoz is an amazing doctor he always takes his time to listen and he is quick on doing paps with no pain or discomfort.

    Annual Well Woman Exam

    The doctor took time to answer all my questions and concerns. The staff were friendly and respectful.

    Routine Pregnancy / Prenatal Appointment

    The best clinical support along with the best OB in town! Dr Arya is a true angel!

    Annual Well Woman Exam

    She listens to me and offers advice. She also pays attention to me instead of her computer. Which doesn’t happen often in a doctors office.

    Annual Well Woman Exam

    A wonderful doctor that truly cares about her patients. She asks good questions and advises if there are any concerns.

    Annual Well Woman Exam

    The office has the friendliest staff and I can never recall waiting long after I check in. I feel I’m always in and out in about 30min.

    Office Visit / Follow-up

    Dr Arya is always a wonderful provider. She takes the time to listen to concerns and is very knowledgeable.