Unio Specialty Care – Gastroenterology – Orange

Unio Health Gastroenterology, Orange, CA

Unio Specialty Care – Gastroenterology – Orange

Office Hours

Monday

8:00 am - 5:00 pm

Tuesday

8:00 am - 5:00 pm

Wednesday

8:00 am - 5:00 pm

Thursday

8:00 am - 5:00 pm

Friday

8:00 am - 2:00 pm

Saturday

Closed

Sunday

Closed

Office Hours

Monday

8:00 am - 5:00 pm

Tuesday

8:00 am - 5:00 pm

Wednesday

8:00 am - 5:00 pm

Thursday

8:00 am - 5:00 pm

Friday

8:00 am - 2:00 pm

Saturday

Closed

Sunday

Closed

Unio Health Gastroenterology, Orange, CA
Connie Lin, NP

Connie Lin, NP

Connie is a board-certified Acute Care Adult-Gerontology Nurse Practitioner who graduated from California State University, Long Beach, with a Master of Science in Nursing.

Terri Rembuskos

Terri Rembuskos, PA-C

Terri Rembuskos is a graduate of the University of California, Irvine. She completed her Bachelor of Science in Biology and a Bachelor of Arts in Political Science in 1998.

Daniel Chiu, NP

Daniel Chiu is a Board Certified Nurse Practitioner who graduated from Azusa Pacific University with his Master of Science in Nursing with an emphasis in adult gerontology.

Haig Najarian, MD

Haig Najarian, MD

Dr. Haig Najarian is a practicing Gastroenterologist in Orange and Irvine, CA. He treats patients with gastrointestinal and liver disease and performs a wide spectrum of endoscopic procedures.

James J. Lee, MD

Dr. James J. Lee has a private practice located in Orange, California and is a clinical assistant professor at the University of California, Irvine.

Hardeep M. Singh, MD

Hardeep M. Singh, MD

Dr. Hardeep M. Singh is Board Certified in Internal Medicine and Gastroenterology. He grew up in Orange County and obtained his undergraduate and medical degree from USC.

Ousama Alkhatib, MD

Ousama Alkhatib, MD

Dr. Ousama Alkhatib is able to offer online tele-health services for patients who want to see or speak to the provider from the comfort of their home.

Alaa Abousaif, MD

Alaa Abousaif, MD

Dr. Alaa Abousaif has been in private practice for the past fifteen years. He has completed extensive advanced training in treating a multitude of digestive disorders and possesses the expertise in utilizing the latest technology to accurately diagnose and treat a full range of digestive problems.

Choose a Provider Below to Schedule an Appointment

If you are an existing patient, please select your provider

Reviews

Unio Health Gastroenterology, Orange, CA

Welcome to Unio Specialty Care – Gastroenterology in Orange, CA

If you’re looking for expert digestive health care in Orange, CA or anywhere in Orange County, you’ve come to the right place. Unio Specialty Care – Gastroenterology in Orange is proud to be one of the region’s leading centers for gastrointestinal (GI) health. We specialize in diagnosing, treating, and managing a wide range of digestive conditions with precision, compassion, and a commitment to improving your quality of life.

Our highly trained gastroenterology team serves patients from Orange and nearby cities, including Anaheim, Santa Ana, Tustin, Garden Grove, and Fullerton. Whether you’re experiencing new symptoms or need long-term care for a chronic GI condition, we’re here to help every step of the way.

Why Our Gastroenterologists are Leaders in the City of Orange

Unio Specialty Care is known across Southern California for excellence in digestive health. At our Orange location, we provide state-of-the-art diagnostic tools and minimally invasive procedures in a warm and welcoming environment. Our board-certified physicians and professional staff work closely with you to create personalized treatment plans that target your unique needs.

We prioritize clear communication and continuity of care, collaborating with your primary care physician or other specialists to ensure you receive comprehensive, coordinated care.

Conditions We Treat at the Gastroenterology Clinic
Our Orange gastroenterology clinic treats a full spectrum of digestive health concerns, including:
  • Acid reflux (GERD)
  • Irritable Bowel Syndrome (IBS)
  • Crohn’s disease
  • Ulcerative colitis
  • Colon polyps
  • Constipation and diarrhea
  • Abdominal bloating and pain
  • Liver and pancreatic disorders
  • Hemorrhoids
  • Gallbladder-related conditions
  • Celiac disease
  • Barrett’s esophagus
We also emphasize the importance of preventive screening, especially for colon cancer. If you are age 45 or older, it may be time to schedule a routine colonoscopy. Early detection can save lives.
Gastroenterology Services
We offer a full range of procedures and services, including: We use minimally invasive, cutting-edge techniques to ensure accuracy, comfort, and the fastest recovery possible.
What We Treat
Our expert gastroenterologists diagnose and treat a broad range of digestive and liver conditions, including:
  • Acid reflux (GERD)
  • Crohn’s disease & ulcerative colitis
  • Irritable bowel syndrome (IBS)
  • Constipation & diarrhea
  • Colon polyps & colon cancer
  • Celiac disease
  • Abdominal pain & bloating
  • Fatty liver disease & hepatitis
  • Barrett’s esophagus
  • Hemorrhoids

FAQs

It depends on your insurance plan. Some require a referral from your primary care doctor, while others do not. We’re happy to check when you call.

We manage digestive conditions like acid reflux, IBS, Crohn’s disease, ulcerative colitis, abdominal pain, and offer colon cancer screening.

Most GI visits are covered, but it varies by provider. We’ll verify your benefits before your appointment.

Bring a list of medications, prior test results, and your insurance card. No fasting is needed unless a procedure has been scheduled.

Typically, your first visit is a consultation. If tests are needed, they’ll be scheduled separately and explained in full.

Yes, our Orange gastroenterology clinic offers comprehensive colon cancer screening services, including colonoscopy and other diagnostic evaluations. Our board-certified GI specialists follow the latest guidelines to help detect and prevent colorectal cancer. We welcome patients from Orange and surrounding areas including Anaheim, Santa Ana, Tustin, and Garden Grove. If you’re 45 or older or have a family history of colorectal cancer, we recommend scheduling a screening today.  Here is a guide on colon cancer screening.

Hospital Affiliations

Doctors at Unio Specialty Care Gastroenterology, an affiliate of Unio Health Partners, in the Orange office have hospital or surgery center affiliations with:

  • Barranca Surgery Center
  • Hoag Hospital Irvine
  • Hoag Hospital Newport Beach
  • La Veta Surgical Center
  • National Ambulatory Surgical Center Orange
  • St. Joseph Hospital Orange
  • St. Joseph Pavilion Surgery Center

Get Started Today

Whether you’re seeking relief from ongoing symptoms or it’s time for your routine colon screening, Unio Specialty Care in Orange, CA is here to provide trusted care close to home.