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

    When I am able to see Dr Munoz, he is thorough, professional and compassionate. However, it is extremely difficult to receive a call back or response to online messages from him or nurse. He said he would call my Rx refill in this visit. It’s been a week since my last visit and I’ve not received any confirmation from his office that the Rx was submitted. Last time it took 6 weeks of me calling and sending messages before his nurse returned my call to simply refill my Rx. She told me Dr M doesn’t read the portal messages. The automated phone also doesn’t recognize patient DOB. So I fear that I am going to once again go another 6 weeks without my meds because no one reads messages or return calls.

    Advanced Laparoscopic Surgery

    Dr. Munoz takes his time to explain everything thoroughly and will answer every question. I never feel like I am just a number and rushes through the appointments.

    Pap Smear

    I really appreciate and respect my doctor and she is wonderful. I love Dr. Simpson!! Awesome physician.

    Annual Well Woman Exam

    office staff were very friendly and helpful Dr arya has always been the sweetest doctor that makes you feel so confrontable and always answers your questions

    Hysterectomy

    Dr. Arya listens to you. She provides great advice and answers all questions and hears your concerns.

    Annual Well Woman Exam

    I saw the doctor that has been hired recently. She was awesome with the pap smear...it wasn't uncomfortable at all. She will make a great asset to the team of doctors there.

    Breast Exam

    Ordered bilateral ultrasound!

    Annual Well Woman Exam

    It’s outstanding to deserve a 5.

    Annual Well Woman Exam

    As always, I was treated with kindness and respect. I have been a patient of Dr Simpson for 20 years. Over the years, she has given me excellent care and occasionally helped me through a mental, emotional challenge. She is both my physician and a friend when I need one.

    Hysterectomy

    Best OBG doctor in San Antonio. Dr. Munoz has lots of patience, Best Doctor.