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:

    Annual Well Woman Exam

    Dr Arya actually listens to you and makes you feel valued and human. No issue is too small and she's very caring and warm not to mention amazing. I've been w8th her for over 20 years. Hands down the best

    IUD Insertion / Removal

    Dr. Arya has a fantastic bedside manner. She is very thoughtful and calming. The only thing that could have made the visit better was timeliness. My appointment was for 12:30, and I was not seen until over an hour after that time. Others in the waiting room were experiencing similar delays; one woman said she was late getting back to work.

    Annual Well Woman Exam

    I’ve been seeing them since I was 17 I love them kind and thorough help you through any situation attentive and on point I will always go there and always recommend to everyone that I know

    Annual Well Woman Exam

    Dr. Munoz and his staff are very caring and attentive. He took the time to listen to my questions. Dr. Munoz also shared information that he felt I needed in order to understand this phase of my life. Specifically, he shared warning signs that would indicate something might be off.

    FallopianTubeCancer

    Professional and Respectful. Warm welcoming.

    Annual Well Woman Exam

    I always enjoy visiting Dr Munoz. He is a great doctor

    Annual Well Woman Exam

    She is a very caring individual/doctor. I've been with her for years. I can't imagine going to anyone else. She's extremely knowledgeable. Absolutely love her I hope she never retires. She takes a personal interest in her patients well being.

    Annual Well Woman Exam

    The staff and the Dr were receptive to all my questions and they showed care

    Advanced Laparoscopic Surgery

    Dr Munoz, is excellent. Exceeded all expectations. Will be referring him to friends and family.

    Pap Smear

    Staff and Doctor Munoz are great