Who is Dr. Chen, Gastroenterologist in San Jose, CA?
Castle Connolly Top Doctor
Castle Connolly Top Doctors are doctor-nominated and selected by a physician-led research team.
What are Areas of Expertise for Dr. Chen?
Dr. Ann Chen, MD is a highly-rated, board-certified Gastroenterologist known for expertly diagnosing, treating, and managing a wide array of related conditions and procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. Chen empowers patients to confidently navigate their health journey, specializing in Endoscopic Ultrasound, Gastrointestinal Cancer, Pancreatic Cancer, and comprehensive wellness support. Serving the San Jose, CA community, Dr. Chen is dedicated to enhancing lives through expert, patient-centered care.
Where did Dr. Chen go to medical school and complete their residency?
Medical School: Albert Einstein College of Medicine of Yeshiva University
What languages does Dr. Chen speak?
Dr. Chen and their clinical team can communicate with patients in the following languages:
- Chinese
- English
What conditions does a Gastroenterologist like Dr. Chen typically treat?
As a Gastroenterologist, Dr. Chen 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. Chen. 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:
- Dark, Tarry Stools (Melena)
- Gastrointestinal Bleeding
- Melena
- Black Stools
- Upper GI Bleed Signs
ICD-10 Codes:
- K921: Melena
Also known as:
- Abnormal Bowel Movements
- Bowel Movement
- Unusual stool
- Changes in poop
- Fecal changes
ICD-10 Codes:
- R195: Other fecal abnormalities
Also known as:
- Abnormal Digestive Tract Imaging
- Abnormal GI scan
- Unusual digestive imaging
- Digestive system imaging findings
ICD-10 Codes:
- R933: Abnormal findings on diagnostic imaging of other parts of digestive tract
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:
- Chronic Hepatitis B
- Hepatitis B
- Long-term Hepatitis B
- Persistent Hepatitis B
- Hep B
ICD-10 Codes:
- B181: Chronic viral hepatitis B without delta-agent
Also known as:
- Upper Middle Abdominal Pain
- Abdominal Pain
- Epigastric pain
- Pain below breastbone
- Upper stomach pain
ICD-10 Codes:
- R1013: Epigastric pain
What procedures does a Gastroenterologist like Dr. Chen typically perform?
As a Gastroenterologist, Dr. Chen 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. Chen. 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:
- Diagnostic Colonoscopy with Biopsy
- Colonoscopy with Biopsy
- Colonoscopy with Polyp Removal
- Colonoscopy
- Colorectal Cancer Screening Tests
- Flexible Colonoscopy
- Colon Exam with Biopsy
- Lower Endoscopy
- Colon Cancer Screening
- Colon Biopsy
- Large Intestine Scope
- Colorectal Cancer Screening
- Flexible Colonoscopy with Polypectomy
- Colon Polyp Removal
- Colorectal Lesion Excision
CPT Codes:
- 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
- 45385: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
Also known as:
- Diagnostic Upper Endoscopy with Biopsy
- EGD with Endoscopic Ultrasound
- EGD with Biopsy
- Esophagogastroduodenoscopy
- Upper GI Endoscopy
- Stomach Scope with Sample
- Upper GI Endoscopy with Ultrasound
- EUS (Endoscopic Ultrasound)
- Esophagus, Stomach, Duodenum Ultrasound
CPT Codes:
- 43235: Esophagogastroduodenoscopy, flexible, transoral; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 43237: Esophagogastroduodenoscopy, flexible, transoral; with endoscopic ultrasound examination limited to the esophagus, stomach or duodenum, and adjacent structures
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:
- Upper Endoscopy with Ultrasound and Biopsy
- Biopsy
- Endoscopy
- Ultrasound
- EGD with Endoscopic Ultrasound Biopsy
- Transoral EUS-FNA
- Esophagogastroduodenoscopy with Biopsy
CPT Codes:
- 43242: Esophagogastroduodenoscopy, flexible, transoral; with transendoscopic ultrasound-guided intramural or transmural fine needle aspiration/biopsy(s) (includes endoscopic ultrasound examination of the esophagus, stomach, and either the duodenum or a surgically altered stomach where the jejunum is examined distal to the anastomosis)
Also known as:
- Capsule Endoscopy
- Pill Camera
- Wireless Capsule Endoscopy
- Small Bowel Capsule Endoscopy
- Intestinal Imaging Pill
CPT Codes:
- 91110: Gastrointestinal tract imaging, intraluminal (eg, capsule endoscopy), esophagus through ileum, with interpretation and report
Does Dr. Chen accept my insurance?
Dr. Chen accepts most major insurance plans. Important: Please contact the office before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Chen accept in San Jose, CA?
Dr. Chen in San Jose, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Alignment Healthcare
City of Los Angeles
Conifer Health Solutions
Elevance Health Inc. (formerly Anthem)
Kaiser Permanente
Medicare
OptumRx Administered Payer
Santa Cruz County
State of California
UnitedHealth Group
View All Insurances
Where is Dr. Chen's office located?
What hospitals are Dr. Chen affiliated with?
Dr. Chen has admitting privileges at the following hospitals:
Recognitions
Publications
Locally advanced gastric cancer complicated by mesenteric invasion and intestil malrotation., 2014
Outcomes of repeat colonoscopy in patients with polyps referred for surgery without biopsy, 2014
Metabolomic-derived novel cyst fluid biomarkers for pancreatic cysts: glucose and kynurenine, 2013
Endoscopic magement of nonlifting colon polyps., 2013
Pancreatic Neuroendocrine Tumors: Radiographic Calcifications Correlate with Grade and Metastasis, 2012
Endoscopic mucosal resection with an over-the-counter hyalurote preparation, 2012
Diagnostic accuracy of cyst fluid amphiregulin in pancreatic cysts, 2012
Cryotherapy for Barrett's esophagus: Who, how, and why?, 2011
Suppurative (Phlegmonous) Gastritis Presenting as a Gastric Mass, 2010
Double balloon enteroscopy detects small bowel mass lesions missed by capsule endoscopy, 2008
Predictive Value of Pancreatic Ductal Dilation on Endoscopic Ultr, 2007
What is the learning curve associated with double-balloon enteroscopy? Technical details, 2006
Porcine stem cell factor facilitates long, 2000
Porcine stem cell engraftment, 2000
Development and alysis of transgenic mice expressing porcine hematopoietic cytokines, 2000
Role of antibody-independent complement activation in rejection of porcine bone marrow cells in, 2000
Routine myocardial revascularization with the radial artery: A multicenter experience, 1998
What is Dr. Chen's NPI number?A National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Chen's National Provider Identifier (NPI) number is 1003840307.
What common questions do patients ask about Dr. Chen?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Chen