Ann Mai, MD
Internist
4950 Barranca Pkwy., Ste 207
Irvine, CA 92604
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592 providers
Availability last updated 02/01/2026
Ann Mai, MD
Internist
4950 Barranca Pkwy., Ste 207
Irvine, CA 92604
John Wikle, MD
Internist
4950 Barranca Pkwy Ste 207
Irvine, CA 92604
Dr. Melanchton Mangoba
Internist
1471 S Riverside Ave
Rialto, CA 92376
Selma Prechel, OD
Internist
33 Creek Rd
Irvine, CA 92604
Selma Prechel, OD
Internist
22931 Triton Way Suite 236
Laguna Hills, CA 92653
Shahriar Jarchi, MD
Internist
721 Harrison Ave
Claremont, CA 91711
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
2282 North State College Blvd
Fullerton, CA 92831
Ali Shahverdiani, MD
Internist
520 N Main Street
Suite 220
Santa Ana, CA 92701
Selma Prechel, OD
Internist
1821 E Chapman Avenue
Fullerton, CA 92831
Selma Prechel, OD
Internist
2520 Red Hill Avenue
Santa Ana, CA 92705
Heacock Urgent Care is a walk-in urgent care clinic providing comprehensive testing services and exceptional patient care to children, adults, and seniors in Moreno Valley, California.
The caring team at Heacock Urgent Care has the experience and education to meet a variety of acute illness and injury needs. They’re always ready and happy to help with getting you the answers you need for personalized treatment.
The practice routinely sees patients for sports injuries. They help patients work toward their goal of complete healing and rehabilitation so they can continue working and engaging in physical activity.
COVID-19 testing and vaccinations are also available on-demand, as well as professional care for sinus infections, cold and flu, dehydration, and ear infections.
Heacock Urgent Care values their community and encourages patients of all ages to visit for all of their mild to moderate medical needs. Schedule an appointment over the phone or online, or walk in for care any time during clinic hours.
Dr. Rafael Penunuri, MD
Internist
24060 Fir Ave
Suite A
Moreno Valley, CA 92553
Selma Prechel, OD
Internist
25492 Maximus St
Mission Viejo, CA 92691
Shahriar Jarchi, MD
Internist
1731 Shenandoah Dr
Claremont, CA 91711
Shahriar Jarchi, MD
Internist
19850 Colima Rd
Walnut, CA 91789
Dr. Melanchton Mangoba
Internist
7509 N Laurel Ave
Fontana, CA 92336