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Dr. Catherine Ngo, MD

Aliso Viejo, CA

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. Ngo, Gastroenterologist in Aliso Viejo, CA?

    Dr. Catherine Ngo, MD is a Gastroenterologist, who primarily practices in Aliso Viejo, CA with 1 additional practice location. She is board certified. Dr. Ngo is fluent in English, Spanish, and Vietnamese, and is currently seeing new patients. Dr. Ngo’s practice accepts Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Ngo’s office at (949) 770-7163.

    Is Dr. Ngo board certified as a Gastroenterologist?

    Yes, Dr. Catherine Ngo, MD is board certified by the American Board of Internal Medicine

    What languages does Dr. Ngo speak?

    Dr. Ngo and their clinical team can communicate with patients in the following languages:

    • English

    • Spanish

    • Vietnamese

    What conditions does a Gastroenterologist like Dr. Ngo typically treat?

    As a Gastroenterologist, Dr. Ngo diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Ngo. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.

    Also known as:

    • Colon Cancer Screening
    • Health Screening
    • Colorectal Cancer Screening (PDQ®)
    • Screening Tests to Detect Colorectal Cancer and Polyps
    • Tests to Detect Colorectal Cancer and Polyps
    • Colorectal Cancer Screening
    • Colonoscopy Screening
    • Bowel Cancer Screening

    ICD-10 Codes:

    • Z1211: Encounter for screening for malignant neoplasm of colon

    Also known as:

    • Acid Reflux
    • GERD
    • Acid Reflux (GER & GERD) in Adults
    • Acid Reflux (GER & GERD) in Children
    • Acid Reflux (GER & GERD) in Infants
    • Gastroesophageal Reflux
    • Heartburn
    • Indigestion

    ICD-10 Codes:

    • K219: Gastro-esophageal reflux disease without esophagitis

    Also known as:

    • Colon Polyps
    • Colonic Polyps
    • Colorectal Polyps
    • Intestinal Polyps
    • Bowel Polyps

    ICD-10 Codes:

    • Z86010: Personal history of colon polyps

    Also known as:

    • Difficulty Swallowing
    • Swallowing Disorder
    • Dysphagia
    • Trouble swallowing
    • Painful swallowing

    ICD-10 Codes:

    • R1310: Dysphagia, unspecified

    What procedures does a Gastroenterologist like Dr. Ngo typically perform?

    As a Gastroenterologist, Dr. Ngo performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Ngo. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.

    Also known as:

    • Colonoscopy with Polyp Removal
    • Diagnostic Colonoscopy with Biopsy
    • Colonoscopy with Biopsy
    • Colonoscopy
    • Colorectal Cancer Screening Tests
    • Flexible Colonoscopy with Polypectomy
    • Colon Polyp Removal
    • Colorectal Lesion Excision
    • Flexible Colonoscopy
    • Colon Exam with Biopsy
    • Lower Endoscopy
    • Colon Cancer Screening
    • Colon Biopsy
    • Large Intestine Scope
    • Colorectal Cancer Screening

    CPT Codes:

    • 45385: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
    • 45378: Colonoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
    • 45380: Colonoscopy, flexible; with biopsy, single or multiple

    Also known as:

    • Upper Endoscopy with Biopsy
    • Biopsy
    • Endoscopy
    • EGD with Biopsy
    • Gastroscopy with Biopsy
    • Esophagogastroduodenoscopy with Biopsy

    CPT Codes:

    • 43239: Esophagogastroduodenoscopy, flexible, transoral; with biopsy, single or multiple

    Also known as:

    • Diagnostic Upper Endoscopy with Biopsy
    • EGD with Biopsy
    • Esophagogastroduodenoscopy
    • Upper GI Endoscopy
    • Stomach Scope with Sample

    CPT Codes:

    • 43235: Esophagogastroduodenoscopy, flexible, transoral; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)

    Also known as:

    • Esophageal Balloon Distension Study
    • Esophageal distension test
    • Balloon provocation test
    • Esophageal pain study

    CPT Codes:

    • 91040: Esophageal balloon distension study, diagnostic, with provocation when performed

    Also known as:

    • Wireless Esophageal pH Test
    • Esophageal pH Test
    • Bravo pH Test
    • Esophageal Reflux Monitoring
    • Acid Reflux Test

    CPT Codes:

    • 91035: Esophagus, gastroesophageal reflux test; with mucosal attached telemetry pH electrode placement, recording, analysis and interpretation

    Does Dr. Ngo accept my insurance?

    Dr. Ngo accepts most major insurance plans. Important: Please call our office at (949) 770-7163 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Ngo accept in Aliso Viejo, CA?

    Dr. Ngo in Aliso Viejo, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.

    Top Insurances

    • All Other Territories

    • All Other Third Party

    • Blue Shield of California

    • Cigna Group

    • CVS Health (formerly Aetna)

    • Hoag Memorial Hospital Presbyterian

    • Medicare

    • State of California

    • UnitedHealth Group

    • Unknown

    View All Insurances

    Where is Dr. Ngo's office located?

    Dr. Catherine Ngo's Primary Practice

    26671 Aliso Creek Rd Ste 101

    Aliso Viejo, CA 92656

    (949) 770-7163

    Get Directions

    Dr. Catherine Ngo's Practice 2

    24221 Calle de la Louisa Ste 300

    Laguna Hills, CA 92653

    Get Directions

    What is Dr. Ngo's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.

    Dr. Ngo's National Provider Identifier (NPI) number is 1558531129.

    What common questions do patients ask about Dr. Ngo?

    Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Ngo

    What is Dr. Catherine Ngo's specialty?

    Dr. Ngo is a Gastroenterologist near Aliso Viejo, CA.

    What does a Gastroenterologist do?

    An internist focused on diagnosing and treating disorders of the digestive system, encompassing the stomach, intestines, liver, and gallbladder. This specialist manages conditions like abdominal pain, ulcers, diarrhea, cancer, and jaundice, and performs intricate diagnostic and therapeutic procedures using endoscopes to examine internal organs.

    Is this Dr. Catherine Ngo affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. Ngo is affiliated with Hoag Hospital Newport Beach, Providence Mission Hospital Mission Viejo which are a Castle Connolly Top Hospitals. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals

    When to see a Gastroenterologist?: Guides for symptoms, conditions, and treatments

    Understand your symptoms and know when it’s time to see a Gastroenterologist. Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.

    Is Catherine Ngo accepting new patients in Aliso Viejo, CA?

    Yes, Dr. Catherine Ngo is accepting new patients at this time.

    Does Dr. Catherine Ngo offer online booking?

    Please contact Dr. Ngo's office at (949) 770-7163 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Catherine Ngo?

    Please contact Dr. Ngo's office at (949) 770-7163 for information regarding telehealth appointment availability or for scheduling assistance.

    Which board certifications does Dr. Catherine Ngo have?

    Dr. Catherine Ngo is certified by the American Board of Internal Medicine.

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