AG
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Gregg, Gastroenterologist in Thousand Oaks, CA?
Dr. Andrew Gregg, MD, PHD is a Gastroenterologist, who primarily practices in Thousand Oaks, CA with 2 additional practice locations. He is board certified. Dr. Gregg is fluent in English, and is currently seeing new patients. Dr. Gregg’s practice accepts Cigna, Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Gregg’s office at (424) 440-3824.
What languages does Dr. Gregg speak?
Dr. Gregg and their clinical team can communicate with patients in the following languages:
English
What conditions does Dr. Gregg treat?
As a Gastroenterologist, Dr. Gregg 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. Gregg. 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.
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:
- Dark, Tarry Stools (Melena)
- Gastrointestinal Bleeding
- Melena
- Black Stools
- Upper GI Bleed Signs
ICD-10 Codes:
- K921: Melena
Also known as:
- Upper Middle Abdominal Pain
- Abdominal Pain
- Epigastric pain
- Pain below breastbone
- Upper stomach pain
ICD-10 Codes:
- R1013: Epigastric pain
Also known as:
- Diarrhea
- Loose stools
- Runny poop
- Frequent bowel movements
ICD-10 Codes:
- R197: Diarrhea, unspecified
Also known as:
- Iron Deficiency Anemia
- Anemia
- Iron
- Anemia from Iron Lack
- Low Iron Anemia
- Sideropenic Anemia
ICD-10 Codes:
- D509: Iron deficiency anemia, unspecified
Also known as:
- Non-Infectious Gastroenteritis and Colitis
- Digestive Disease
- Inflammation of Stomach and Intestines
- Non-Bacterial Colitis
- Gut Inflammation
ICD-10 Codes:
- K529: Noninfective gastroenteritis and colitis, unspecified
What procedures does Dr. Gregg perform?
As a Gastroenterologist, Dr. Gregg 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. Gregg. 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.
Also known as:
- Colonoscopy with Biopsy
- Colonoscopy with Polyp Removal
- Diagnostic Colonoscopy with Biopsy
- Colonoscopy
- Colorectal Cancer Screening Tests
- Flexible Colonoscopy
- Colon Biopsy
- Large Intestine Scope
- Colorectal Cancer Screening
- Flexible Colonoscopy with Polypectomy
- Colon Polyp Removal
- Colorectal Lesion Excision
- Colon Exam with Biopsy
- Lower Endoscopy
- Colon Cancer Screening
CPT Codes:
- 45380: Colonoscopy, flexible; with biopsy, single or multiple
- 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)
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
Does Dr. Gregg accept my insurance?
Dr. Gregg accepts most major insurance plans. Important: Please call our office at (424) 440-3824 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Gregg accept in Thousand Oaks, CA?
Dr. Gregg in Thousand Oaks, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
All Other Third Party
Blue Shield of California
Centene
Cigna
Crown Cork and Seal Company
CVS Health (formerly Aetna)
Elevance Health Inc. (formerly Anthem)
Humana
Medicare
UnitedHealthcare
View All Insurances
Where is Dr. Gregg's office located?
Dr. Andrew Gregg's Primary Practice
248 Hampshire Rd Ste 200
Thousand Oaks, CA 91361
(424) 440-3824
Dr. Andrew Gregg's Practice 2
10945 Le Conte Ave Ste 2114
Los Angeles, CA 90095
(424) 440-3824
What is Dr. Gregg's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Gregg's National Provider Identifier (NPI) number is 1942769104.
What common questions do patients ask about Dr. Gregg?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Gregg
What is Dr. Andrew Gregg's specialty?
Dr. Gregg is a Gastroenterologist near Thousand Oaks, CA. 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. Contact Dr. Gregg to book an appointment today.
Is this Dr. Andrew Gregg affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Gregg is affiliated with Los Robles Regional Medical Center, Ronald Reagan UCLA Medical Center, Henry Mayo Newhall Hospital 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
Where can I learn more about Gastroenterologist?
Explore Gastroenterologist with 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 Andrew Gregg accepting new patients in Thousand Oaks, CA?
Yes, Dr. Andrew Gregg is accepting new patients at this time.
Does Dr. Andrew Gregg offer online booking?
Please contact Dr. Gregg's office at (424) 440-3824 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Andrew Gregg?
Please contact Dr. Gregg's office at (424) 440-3824 for information regarding telehealth appointment availability or for scheduling assistance.
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