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      San Antonio Gastroenterology Endoscopy Center
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          San Antonio Gastroenterology Endoscopy Center
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            Directions
            • Home
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              Patients and Visitors

              • Admissions
              • Billing Process
              • Patient Forms
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              • Your Surgery
              • The BEE Award
              • The DAISY Award
            • Locations
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            • Pre-Registration
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            Find A Doctor

            • San Antonio Gastroenterology Endoscopy Center /
            • Find A Doctor

            John J. Alvarez, MD

            Gastroenterology, Internal Medicine


            SAGEC - North
            (210) 775-2265
            Get Directions
            (210) 775-2265

            Eddie Flores, MD

            Gastroenterology


            SAGEC - North
            (210) 775-2265
            Get Directions
            (210) 775-2265

            Kevin J. Franklin, MD

            Transplant Hepatology, Gastroenterology


            SAGEC - North
            (210) 775-2265
            Get Directions
            (210) 775-2265

            Ernest Guerra, MD

            Gastroenterology, Internal Medicine


            SAGEC - Downtown
            (210) 775-2265
            Get Directions
            (210) 775-2265

            Joseph Johnson IV, MD

            Gastroenterology


            SAGEC - North
            (210) 775-2265
            Get Directions
            (210) 775-2265

            Chaithanya Mallikarjun, MD

            Transplant Hepatology, Gastroenterology


            SAGEC - North
            (210) 775-2265
            Get Directions
            (210) 775-2265

            Richard Otero, MD

            Gastroenterology


            SAGEC - Downtown
            (210) 775-2265
            Get Directions
            (210) 775-2265

            Belinda Ramirez, MD

            Gastroenterology


            SAGEC - Medical Center
            (210) 775-2265
            Get Directions
            (210) 775-2265

            Antonio Serna, MD

            Gastroenterology, Internal Medicine


            SAGEC - Downtown
            (210) 775-2265
            Get Directions
            (210) 775-2265

            Mohammad Taheri, MD

            Gastroenterology


            SAGEC - Downtown
            (210) 775-2265
            Get Directions
            (210) 775-2265

            Physician Star Rating Description

            Each patient's experience at our practice is important to us. As we strive to provide the highest level of care, we value feedback on all aspects of the patient experience. This Medical GPS patient experience survey measures patient satisfaction from the time the appointment was made to the time the patient spent with the provider.

            San Antonio Gastroenterology Endoscopy Center - Downtown
            520 East Euclid Ave.
            San Antonio, TX 78212
            Phone: (210) 242-0008
            Fax: (210) 223-2914
            San Antonio Gastroenterology Endoscopy Center - Medical Center
            2833 Babcock Rd. , Ste. 120
            San Antonio, TX 78229
            Phone: (210) 581-9290
            Fax: (210) 593-9200
            San Antonio Gastroenterology Endoscopy Center - North
            150 E Sonterra Blvd. , Ste. 110
            San Antonio, TX 78258
            Phone: (210) 491-9998
            Fax: (210) 491-9978
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            © 2026 JV Entity and its affiliates. All rights reserved.
            Notice of Privacy Practices | Terms & Conditions | Notice at Collection | Privacy Notice
            Social Media Policy | Acceptable Use Policy | Nondiscrimination Notice
            Surprise Billing Protections | Your Privacy Choices California Consumer Privacy Act (CCPA) Opt-Out Icon | Right to Receive Estimate | Accessibility | Disclosures