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Availability last updated 10/26/2025
Advanced Gastroenterology & Liver Institute in Anaheim, Santa Ana, Fullerton, and Huntington Beach, California, provides comprehensive gastroenterology care. People travel from all over to consult with Tahmina Haq, MD, who is well-known for her compassionate care and clinical expertise.
At Advanced Gastroenterology & Liver Institute, Dr. Haq specializes in diagnosing and treating digestive disorders like Crohn’s disease, ulcerative colitis, and hepatitis. She also performs a number of diagnostic procedures, including upper endoscopy, endoscopic ultrasound, and endoscopic retrograde cholangiopancreatography (ERCP).
In addition, people come to Advanced Gastroenterology & Liver Institute for colon cancer screenings and treatment of colon polyps. Dr. Haq maintains an adenoma detection rate (ADR) well above the national benchmark of 25%, as established by leading Gastroenterology societies and published guidelines from the ASGE, ACG, and peer-reviewed medical journals. This reflects her commitment to high-quality, thorough, and preventive patient care.
After earning her Doctor of Medicine at Shifa College of Medicine in Rawalpindi, Islamabad, Pakistan, Dr. Haq completed her internal medicine residency at Loma Linda University Medical Center in Loma Linda, California.
She then completed her gastroenterology fellowship at the University of California, San Francisco (UCSF) and her advanced endoscopy fellowship at Harbor-UCLA Medical Center in West Carson, California.
Dr. Haq takes the time to get to know her patients, building trust and long-lasting relationships. When not taking care of her patients, Dr. Haq enjoys traveling and spending time with her family.
Call Advanced Gastroenterology & Liver Institute or use the online booking button to schedule an appointment today.
Tahmina Haq, MD
Gastroenterologist
801 N. Tustin Ave.
Ste 700
Santa Ana, CA 92705
Selma Prechel, OD
Internist
2520 Red Hill Avenue
Santa Ana, CA 92705
Anooshiravan Hami, MD
Pulmonologist
17 Vetrina
Irvine, CA 92606
Anooshiravan Hami, MD
Pulmonologist
600 E Washington Avenue
Santa Ana, CA 92701
Shawn Hamilton, MD, has more than 20 years of experience as a board-certified physician in internal medicine. She practices at Spruce Medical Group in Irvine, California, and is affiliated with Hoag Memorial Hospital Presbyterian, located in Newport and in Irvine, California. Dr. Hamilton speaks many languages, including Chinese (Mandarin), Taiwanese, and some medical Spanish.
Dr. Hamilton graduated from the David Geffen School of Medicine at UCLA and completed her residency in Internal Medicine at the Charles R. Drew University of Science and Medicine in Los Angeles. To reach as many people in her diverse community as possible, she accepts a wide range of insurances, including Cal-Optima, Medicare, Aetna PPO, Blue Cross Prudent Buyer PPO, and United Health PPO.
As a primary care physician, Dr. Hamilton sees her role as addressing the concerns of the men and women who visit her office, assessing their symptoms, and treating them, or if necessary, referring them to a subspecialist. She prides herself on minimizing any delay in calling in medications and processing referrals for lab and radiology orders, which has earned her accolades for running an efficient, caring practice and the Top Doctors award of Orange Coast Magazine.
Shawn Hamilton Md Inc
Internist
4902 Irvine Center Dr
Suite 105
Irvine, CA 92604
Ali Shahverdiani, MD
Internist
520 N Main Street
Suite 220
Santa Ana, CA 92701
Selma Prechel, OD
Internist
33 Creek Rd
Irvine, CA 92604
Ann Mai, MD
Internist
4950 Barranca Pkwy., Ste 207
Irvine, CA 92604
John Wikle, MD
Internist
4950 Barranca Pkwy Ste 207
Irvine, CA 92604
Shirin Afrasiabi, MD Inc
Internist
4950 Barranca Pkwy
Ste 308
Irvine, CA 92694
Selma Prechel, OD
Internist
34 Executive Park Suite 212
Irvine, CA 92614
Selma Prechel, OD
Internist
1030 W Warner Avenue
Santa Ana, CA 92707
Selma Prechel, OD
Internist
1209 Hemlock Way
Santa Ana, CA 92707
Selma Prechel, OD
Internist
1100 W Stewart Dr Orange
Orange, CA 92868
