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Accepting patients
Who is Dr. Guan, Gastroenterologist in Oxnard, CA?
Dr. Jay Guan, MD is a Gastroenterologist, who primarily practices in Oxnard, CA with 2 additional practice locations. Dr. Guan is fluent in English, Chinese, and Spanish, and is currently seeing new patients. Dr. Guan’s practice accepts Kaiser Permanente, Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Guan’s office at (323) 226-7556.
What languages does Dr. Guan speak?
Dr. Guan and their clinical team can communicate with patients in the following languages:
Chinese
English
Spanish
What conditions does Dr. Guan treat?
As a Gastroenterologist, Dr. Guan 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. Guan. 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:
- Stomach or Duodenum Polyp
- Stomach and Duodenum Disorder
- Stomach Disorder
- Gastric Polyp
- Duodenal Polyp
- Stomach Growth
- Gastric Conditions
- Duodenal Conditions
- Digestive System Disorders
ICD-10 Codes:
- K317: Polyp of stomach and duodenum
- K3189: Other diseases of stomach and duodenum
Also known as:
- Difficulty Swallowing
- Swallowing Disorder
- Dysphagia
- Trouble swallowing
- Painful swallowing
ICD-10 Codes:
- R1310: Dysphagia, unspecified
Also known as:
- Colon Polyps
- Colonic Polyps
- Colorectal polyps
- Bowel polyps
- Intestinal polyps
ICD-10 Codes:
- K635: Polyp of colon
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
What procedures does Dr. Guan perform?
As a Gastroenterologist, Dr. Guan 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. Guan. 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 with Polyp/Tumor Removal
- Colonoscopy with Hemorrhoid Ligation
- Colonoscopy with Bleeding Control
- 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
- Flexible colonoscopy with ablation
- Colon polyp removal
- Colon tumor destruction
- Therapeutic colonoscopy
- Hemorrhoid Banding
- Colon Exam with Ligation
- Endoscopic Hemostasis
- Colonoscopy for Bleeding
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)
- 45388: Colonoscopy, flexible; with ablation of tumor(s), polyp(s), or other lesion(s) (includes pre- and post-dilation and guide wire passage, when performed)
- 45398: Colonoscopy, flexible; with band ligation(s) (eg, hemorrhoids)
- 45382: Colonoscopy, flexible; with control of bleeding, any method
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:
- Esophagus Widening Procedure (Endoscopic)
- EGD with Esophageal Balloon Dilation
- Colonoscopy with Injections
- Sigmoidoscopy with Hemorrhoid Banding
- Flexible Sigmoidoscopy with Biopsy
- Upper Endoscopy with Varices Banding
- Upper Endoscopy with Injections
- Diagnostic Upper Endoscopy with Biopsy
- Colonoscopy
- Colorectal Cancer Screening Tests
- Esophageal Dilation
- EGD with Dilation
- Upper Endoscopy with Widening
- Upper Endoscopy with Esophageal Dilation
- Flexible Esophagoscopy with Balloon
- EGD with Balloon Widening
- Flexible Colonoscopy with Injection
- Colon Scope with Medication
- Therapeutic Colonoscopy
- Flexible Sigmoidoscopy with Ligation
- Hemorrhoid Banding (Sigmoidoscopy)
- Lower Endoscopy for Hemorrhoids
- Sigmoid Colon Scope with Biopsy
- Lower Endoscopy with Tissue Sample
- Flexible Sigmoidoscopy and Biopsy
- Rectum and Lower Colon Exam
- EGD with Band Ligation
- Esophageal Varices Banding
- Gastric Varices Treatment
- EGD with Submucosal Injections
- Esophagogastroduodenoscopy with Injections
- Stomach Scope with Medication
- EGD with Biopsy
- Esophagogastroduodenoscopy
- Upper GI Endoscopy
- Stomach Scope with Sample
CPT Codes:
- 43248: Esophagogastroduodenoscopy, flexible, transoral; with insertion of guide wire followed by passage of dilator(s) through esophagus over guide wire
- 43249: Esophagogastroduodenoscopy, flexible, transoral; with transendoscopic balloon dilation of esophagus (less than 30 mm diameter)
- 45381: Colonoscopy, flexible; with directed submucosal injection(s), any substance
- 45350: Sigmoidoscopy, flexible; with band ligation(s) (eg, hemorrhoids)
- 45331: Sigmoidoscopy, flexible; with biopsy, single or multiple
- 43244: Esophagogastroduodenoscopy, flexible, transoral; with band ligation of esophageal/gastric varices
- 43236: Esophagogastroduodenoscopy, flexible, transoral; with directed submucosal injection(s), any substance
- 43235: Esophagogastroduodenoscopy, flexible, transoral; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
Also known as:
- Upper Endoscopy with Polyp Removal
- Upper Endoscopy with Tumor Ablation
- EGD with Polypectomy
- Esophagus, Stomach, Duodenum Scope with Removal
- Flexible Endoscopy Tumor Excision
- EGD with Ablation
- Esophagus, Stomach, Duodenum Scope with Ablation
- Flexible Endoscopy Lesion Treatment
CPT Codes:
- 43251: Esophagogastroduodenoscopy, flexible, transoral; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
- 43270: Esophagogastroduodenoscopy, flexible, transoral; with ablation of tumor(s), polyp(s), or other lesion(s) (includes pre- and post-dilation and guide wire passage, when performed)
Also known as:
- Hemorrhoid Removal with Rubber Band Ligation
- Rubber Band Ligation for Hemorrhoids
- Internal Hemorrhoid Ligation
- Banding of Hemorrhoids
- Hemorrhoid Banding
CPT Codes:
- 46221: Hemorrhoidectomy, internal, by rubber band ligation(s)
Also known as:
- Stopping Bleeding in Esophagus, Stomach, or Duodenum
- EGD with Bleeding Control
- Upper GI Endoscopy for Bleeding
- Gastric Bleeding Treatment
CPT Codes:
- 43255: Esophagogastroduodenoscopy, flexible, transoral; with control of bleeding, any method
Also known as:
- Esophageal Dilation (Bougie)
- Esophageal Widening
- Bougie Dilation of Esophagus
- Swallowing Tube Dilation
CPT Codes:
- 43450: Dilation of esophagus, by unguided sound or bougie, single or multiple passes
Also known as:
- Sigmoidoscopy with Polyp Removal
- Colorectal Cancer Screening Tests
- Flexible Sigmoidoscopy with Polypectomy
- Colon Polyp Removal (Lower Colon)
- Sigmoid Colon Lesion Excision
- Lower Endoscopy with Polyp Removal
CPT Codes:
- 45338: Sigmoidoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
Also known as:
- Laparoscopic Repair of Paraesophageal Hernia (No Mesh)
- Keyhole Paraesophageal Hernia Repair
- Laparoscopic Hiatal Hernia Repair
- Fundoplasty (Laparoscopic)
CPT Codes:
- 43281: Laparoscopy, surgical, repair of paraesophageal hernia, includes fundoplasty, when performed; without implantation of mesh
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
Also known as:
- Liver Elastography
- Elastography
- FibroScan
- Liver stiffness test
- Shear wave elastography
CPT Codes:
- 91200: Liver elastography, mechanically induced shear wave (eg, vibration), without imaging, with interpretation and report
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. Guan accept my insurance?
Dr. Guan accepts most major insurance plans. Important: Please call our office at (323) 226-7556 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Guan accept in Oxnard, CA?
Dr. Guan in Oxnard, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Alignment Health Plan
All Other Third Party
Blue Shield of California
Crown Cork and Seal Company
Elevance Health Inc. (formerly Anthem)
Humana
Kaiser Permanente
Other Health Care Provider
Other Provider Networks
Ventura County Health Plan
View All Insurances
Where is Dr. Guan's office located?
What is Dr. Guan's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Guan's National Provider Identifier (NPI) number is 1295122497.
What common questions do patients ask about Dr. Guan?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Guan
What is Dr. Jay Guan's specialty?
Dr. Guan is a Gastroenterologist near Oxnard, 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. Guan to book an appointment today.
Is this Dr. Jay Guan affiliated with a ranked Castle Connolly Top Hospital?
No, Guan is not affiliated with a Castle Connolly Top Hospital, but is affiliated with the following hospitals: Dignity Health - St. Johns Regional Medical Center, St Johns Regional Medical Center, Dignity Health - St. Johns Hospital Camarillo. Castle Connolly Top Hospitals 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 Jay Guan accepting new patients in Oxnard, CA?
Yes, Dr. Jay Guan is accepting new patients at this time.
Does Dr. Jay Guan offer online booking?
Please contact Dr. Guan's office at (323) 226-7556 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Jay Guan?
Please contact Dr. Guan's office at (323) 226-7556 for information regarding telehealth appointment availability or for scheduling assistance.
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