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 has such great bedside manner. She takes the time to listen and engages w her patients. She provides great feedback and performs exams gently and w guidance.

    Annual Well Woman Exam

    I’ve been seen by the same doctor for many years and was glad to be able to see her again @ this new location. The staff are very helpful and very friendly.

    Annual Well Woman Exam

    Dr. Munoz is & has always been so patient & hears & understands & assists quickly any issues he's the best and has been for the past 31yrs I've had him as my obgyn delivering my 2 kids.

    Annual Well Woman Exam

    Cristina simpson provides amazing care and service! Especially with birth/delivery

    Annual Well Woman Exam

    Dr Arya is always warm and personable. She treats you as an individual making sure to remember details about you personally. Staff is always so nice and helpful

    Gynecological Problem Visit

    Got a timely appointment and detailed explanation of my problem.

    Annual Well Woman Exam

    Everything from check in to check out is a breeze. Dr. Munoz has always been so patient and thorough with me making me feel comfortable.

    Annual Well Woman Exam

    Dr. Simpson takes the time to listen to my concerns. She takes her time with me and makes sure I’m good with everything.

    Annual Well Woman Exam

    The office staff were kind and welcoming. Dr. Ayra-DeGaetano was amazing. She came into my room happy to see me and made me feel very comfortable.

    Advanced Laparoscopic Surgery

    I came in with a problem. I was diagnosed. Surgery went well. Doctor and staff are very kind and knowledgeable.