Gastro
Gastro
Quality patient care, every time.

Gastroenterology & Advanced Endoscopy

DHR Health Gastroenterology & Advanced Endoscopy is dedicated to providing the highest quality of care to patients in the Rio Grande Valley who have digestive health problems or concerns. With over 100 years of combined experience, our board-certified physicians specialize in the diagnosis and treatment of medical conditions of the esophagus, stomach, intestines, rectum, liver, gallbladder, and pancreas. If you require a procedure, rest assured you are receiving care in the best setting – DHR Health has been certified for its quality and safety by the American Society for Gastrointestinal Endoscopy since 2009. From common to complex diseases, we provide comprehensive evaluation, education, and care for everyone.

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Services

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Capsule Endoscopy

A capsule endoscopy is a procedure that uses a small, wireless camera in the shape of a vitamin to take pictures of your digestive tract. The photos are transmitted to a belt around your waist, so your gastroenterologist can see areas that aren't easily accessible during a traditional endoscopy. Capsule endoscopy can help identify gastrointestinal bleeding, Chron's disease, cancer, celiac disease, or polyps.

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Colonoscopy

A colonoscopy is an exam used to identify intestinal problems, screen for colon cancer, and look for polyps. Your doctor will use a tiny video camera at the end of a long, flexible tube to see inside your colon. During this procedure, polyps or tissues can be removed through the scope.

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Endoscopic Retrograde Cholangiopancreatography

ERCP, or endoscopic retrograde cholangiopancreatography, is a procedure that uses X-rays and an endoscope to view, diagnose, and treat problems in the bile ducts, pancreas, liver, and gallbladder. ERCP is also used to diagnose pancreatic disease, including pancreatitis and cancer.

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Endoscopic Ultrasound

Endoscopic ultrasound is a minimally invasive procedure to assess the digestive tract. Using high-frequency sound waves, the procedure produces detailed images of the lining of the digestive tract and nearby organs such as the pancreas and liver. Your physician may combine an endoscopic ultrasound with a fine-needle aspiration to take a biopsy of fluid and tissue in the abdomen.

Conditions

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Chronic Constipation

Occasional constipation occurs in many people, but some may experience chronic constipation. Chronic constipation is defined as constipation lasting several weeks or longer. If you suffer from chronic constipation, your doctor will treat according to the cause, and may recommend methods to prevent constipation from happening in the future.

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Colon Cancer

Colon cancer is the cancer of the colon, or large intestine, the final segment of your digestive tract. Talk to your doctor about the best options to help prevent colon cancer, such as screenings and lifestyle changes.

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Crohn's Disease

Crohn's disease is an inflammatory bowel disease that causes inflammation in your digestive tract. While the inflammation and symptoms of Crohn's Disease can be painful and prohibiting, our team of gastroenterologists will work to get you back to living your everyday life.

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Diverticulitis

Diverticulitis is the inflammation of the diverticula, small bulging pouches that can form on the lining of your digestive tract. They are most commonly located on the lower part of the large intestine, or colon.

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Gastritis

There are many conditions that fall under the term gastritis. They are all defined as inflammation of the lining of the stomach. Acute gastritis has sudden onset, while chronic gastritis appears over time. In most cases, gastritis is not serious and can be treated rapidly by your doctor.

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Gastroesophogeal Reflux Disease (GERD)

Gastroesophogeal reflux disease (GERD) is when stomach acid, or acid reflux, flows back up into the stomach or esophagus. Most people experience mild symptoms and can manage them with over-the-counter medication and lifestyle changes. If you are experiencing severe symptoms, call your doctor to make an appointment.

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Hemorrhoids

Hemorrhoids are inflamed or swollen veins in your anus and lower rectum. Hemorrhoids are very common among adults - 3 in 4 adults will have or have had hemorrhoids. There are plenty of effective options available to treat hemorrhoids, but if your symptoms persist, contact your doctor to rule out any other conditions.

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Hepatitis

Hepatitis is a group of viral diseases that affect the liver. Hepatitis is categorized into three different types: Hepatitis A, Hepatitis B, and Hepatitis C. Each type has different symptoms and treatments. Although the three types of Hepatitis are distinctly different, there are ways to prevent the disease from happening. For Hepatitis A and B, the best form of prevention is vaccination. For Hepatitis C, hygiene and lifestyle practices are the best forms of prevention.

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Peptic Ulcers

Peptic ulcers are sores that form on the lining of your stomach and top portion of your small intestine. Peptic ulcers include gastric ulcers and duodenal ulcers. Gastric ulcers are in the stomach, and gastric ulcers are on the top portion of the duodenum, or small intestine. The most common causes for peptic ulcers are the long-term use of nonsteroidal anti-inflammatory drugs, or NSAIDs (ex: Advil, Motrin), naproxen (ex: Aleve, Anaprox), asprin, or the bacterium Helicobacter pylori (H. pylori).

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Rectal Bleeding

Rectal bleeding refers to any bleeding that passes through the rectum. Blood color varies from bright red to dark maroon. If you are experiencing rectal bleeding, you should consult with your doctor right away.

Find the care you need

Our Physicians

Asif Zamir, MD, FACG
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Asif Zamir, MD, FACG

Gastroenterology
Locations
5520 Leonardo Da Vinci Dr
Suite 100
Edinburg, TX 78539

(956) 362-3636
(956) 362-2699
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Carlos J. Cardenas, MD
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Carlos J. Cardenas, MD

Gastroenterology
Locations
5520 Leonardo Da Vinci Dr
Suite 100
Edinburg, TX 78539

(956) 362-3636
(956) 362-2699
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101 FM 3167
Suite 106
Rio Grande City, TX 78582

(956) 362-3920
(956) 362-3929
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Henry Herrera, MD
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Henry Herrera, MD

Gastroenterology & Advanced Endoscopy
Locations
5520 Leonardo Da Vinci Dr
Suite 100
Edinburg, TX 78539

(956) 362-3636
(956) 362-2699
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Juan Sanchez, MD
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Juan Sanchez, MD

Gastroenterology & Advanced Endoscopy
Locations
5520 Leonardo Da Vinci Dr
Suite 100
Edinburg, TX 78539

(956) 362-3636
(956) 362-2699
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1100 E. Dove Ave.
Suite 200-202
McAllen, TX 78504

(956) 362-8840
(956) 362-8845
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S. Behara, MD
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S. Behara, MD

Gastroenterology
Locations
5520 Leonardo Da Vinci Dr
Suite 100
Edinburg, TX 78539

(956) 362-3636
(956) 362-2699
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S. Murthy Badiga, MD
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S. Murthy Badiga, MD

Gastroenterology
Locations
5520 Leonardo Da Vinci Dr
Suite 100
Edinburg, TX 78539

(956) 362-3636
(956) 362-2699
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902 S. Airport Drive
Suite 6
Weslaco, TX 78596

(956) 362-3636
(956) 362-2699
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Sarahi Herrera, MD
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Sarahi Herrera, MD

Gastroenterology
Locations
5520 Leonardo Da Vinci Dr
Suite 100
Edinburg, TX 78539

(956) 362-3636
(956) 362-2699
Get Directions
101 FM 3167
Suite 106
Rio Grande City, TX 78582

(956) 362-3920
(956) 362-3929
Get Directions
Find the care you need

Our Locations

McAllen

Advanced Endoscopy Institute
1100 E. Dove Ave.
Suite 200-202
McAllen, TX 78504
(956) 362-8840
(956) 362-8845
Hours:

physicians
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Edinburg

DHR Health Gastroenterology (Edinburg)
5520 Leonardo Da Vinci Dr
Suite 100
Edinburg, TX 78539
(956) 362-3636
(956) 362-2699
Hours:

physicians
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Weslaco

DHR Health Gastroenterology (Weslaco)
902 S. Airport Drive
Suite 6
Weslaco, TX 78596
(956) 362-3636
(956) 362-2699
Hours:

physicians
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Mission

DHR Health Specialty Clinic (Mission)
2121 E. Griffin Parkway
Suite 16
Mission, TX 78572
(956) 362-3636
(956) 362-2999
Hours:

physicians
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Mission

DHR Health Specialty Clinic (Mission)
2121 E. Griffin Parkway
Suite 16
Mission, TX 78572
(956) 362-8740
(956) 362-2999
Hours:

physicians
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Rio Grande City

DHR Health Specialty Clinic (Rio Grande City)
101 FM 3167
Suite 106
Rio Grande City, TX 78582
(956) 362-3920
(956) 362-3929
Hours:

physicians
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Patient-Centered Care

What our patients are saying

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Second visit with Dr Cardenas/NP Nancy E for multiple results. From the moment they open the door for you until they open (it) for you again before you leave, you’re in GREAT hands…It was very clear that the working relationship between physician and physician assistant (is) seamlessly aligned. I look forward to seeing y’all again in 6 months.

A. Gonzales Nov 22, 2024
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Thank God DHR now has a female GI! They couldn't have selected a better candidate than Dr. Sarahi Herrera-Gonzalez…Dr. Herrera took the time to listen to my concerns and thoroughly explained every aspect of the treatment options…During my appointment, she patiently answered all my questions and provided practical advice that has improved my health. The staff was also amicable and efficient, making the entire experience seamless…I wholeheartedly recommend Dr. Herrera-Gonzalez!

M. Tellez Sep 22, 2024
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I’m from El Paso, TX…Dr. Sanchez was very knowledgeable and gave a broad (number) of tests of proper diagnosis, so I was very happy with that. And the nurses were all so friendly and very efficient with their work!

DHR Health Patient Feb 22, 2024
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Dr. Zamir and staff were EXCELLENT! They helped me feel at ease, responded to my questions, and took care of all my needs. I am so grateful!

DHR Aug 24, 2020
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The doctor was very attentive, willing, my expectations were met. Great patient service.

DHR Health Patient Aug 19, 2020
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Dr. Behara is very helpful and friendly. He is always a very good listener and concerned. He has been my doctor for almost 20 years.

DHR Health Patient Aug 19, 2020
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You guys just keep doing that great job!!

DHR Health Patient Aug 19, 2020
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The entire staff at Dr. Zamir’s office is wonderful… I feel comfortable with them all. Thank you for being extra sweet with this all the time. 10 stars for y’all!.

DHR Health Patient Aug 19, 2020
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Dr. Behara is a wonderful doctor. We need more doctors like him.

DHR Health Patient Aug 19, 2020

Videos

What to Expect • Endoscopy

Are you undergoing an endoscopy soon? Learn the reasons behind this procedure and find out what to expect in our latest video.

What to Expect • Colonoscopy

Are you undergoing a colonoscopy soon? Learn the reasons behind this procedure and find out what to expect in our latest video.

Qué Esperar • Endoscopía

¿Te someterás a una endoscopía pronto? Conozca las razones detrás de este procedimiento y descubra que esperar en nuestro último video.​

Qué Esperar • Colonoscopía

¿Te someterás a una colonoscopía? Conozca las razones detrás de este procedimiento y descubra que esperar en nuestro último video.​
DHR Health

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Our Physicians

DHR Health is majority owned by the same doctors that treat patients every single day. Choose from our wide range of specialty clinic doctors, physician-partners, and hospital staff.

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