JW
Accepting patients
Who is Dr. Williams, Gastroenterologist in San Jose, CA?
Dr. Jason Williams, MD is a Gastroenterologist, who primarily practices in San Jose, CA. He is board certified. Dr. Williams graduated from Duke University School of Medicine. Dr. Williams is fluent in English, and is currently seeing new patients. Dr. Williams’s practice accepts Kaiser Permanente, Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Williams’s office at (408) 885-7947.
Where did Dr. Williams go to medical school and complete their residency?
Medical School: Duke University School of Medicine
Is Dr. Williams board certified as a Gastroenterologist?
Yes, Dr. Jason Williams, MD is board certified by the American Board of Internal Medicine
What languages does Dr. Williams speak?
Dr. Williams and their clinical team can communicate with patients in the following languages:
English
What conditions does Dr. Williams treat?
As a Gastroenterologist, Dr. Williams 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. Williams. 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:
- 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:
- Rectal Bleeding
- Dark, Tarry Stools (Melena)
- Gastrointestinal Bleeding
- Gastrointestinal (GI) Bleeding
- Anal Bleeding
- Blood in Stool
- Lower GI Bleed
- Melena
- Black Stools
- Upper GI Bleed Signs
ICD-10 Codes:
- K625: Hemorrhage of anus and rectum
- K921: Melena
Also known as:
- Cirrhosis
- Alcoholic Cirrhosis with Fluid Buildup
- Alcohol Use Disorder (AUD)
- Liver scarring
- End-stage liver disease
- Chronic liver failure
- Alcoholic cirrhosis with ascites
- Alcohol-induced cirrhosis with fluid
- Liver scarring with abdominal fluid
ICD-10 Codes:
- K7460: Unspecified cirrhosis of liver
- K7031: Alcoholic cirrhosis of liver with ascites
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:
- 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
What procedures does Dr. Williams perform?
As a Gastroenterologist, Dr. Williams 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. Williams. 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
Also known as:
- Diagnostic Upper Endoscopy with Biopsy
- Colonoscopy with Injections
- Colonoscopy
- Colorectal Cancer Screening Tests
- EGD with Biopsy
- Esophagogastroduodenoscopy
- Upper GI Endoscopy
- Stomach Scope with Sample
- Flexible Colonoscopy with Injection
- Colon Scope with Medication
- Therapeutic Colonoscopy
CPT Codes:
- 43235: Esophagogastroduodenoscopy, flexible, transoral; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 45381: Colonoscopy, flexible; with directed submucosal injection(s), any substance
Also known as:
- Belly Fluid Drainage
- Abdominal Fluid Aspiration
- Ascites Drainage
- Peritoneal Fluid Removal
CPT Codes:
- 49082: Abdominal paracentesis (diagnostic or therapeutic); without imaging guidance
Does Dr. Williams accept my insurance?
Dr. Williams accepts most major insurance plans. Important: Please call our office at (408) 885-7947 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Williams accept in San Jose, CA?
Dr. Williams 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 Health Plan
All Other Third Party
Central California Alliance for Health
Conifer Health Solutions
Crown Cork and Seal Company
Medicare
Mohawk Industries
OptumRx
Santa Clara Family Health Plan
State of Tennessee
View All Insurances
Where is Dr. Williams' office located?
What is Dr. Williams's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Williams's National Provider Identifier (NPI) number is 1083894257.
What common questions do patients ask about Dr. Williams?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Williams
What is Dr. Jason Williams's specialty?
Dr. Williams is a Gastroenterologist near San Jose, 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. Williams to book an appointment today.
Is this Dr. Jason Williams affiliated with a ranked Castle Connolly Top Hospital?
No, Williams is not affiliated with a Castle Connolly Top Hospital, but is affiliated with the following hospitals: Santa Clara Valley Medical Center, St. Louise Regional Hospital. 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 Jason Williams accepting new patients in San Jose, CA?
Yes, Dr. Jason Williams is accepting new patients at this time.
Does Dr. Jason Williams offer online booking?
Please contact Dr. Williams's office at (408) 885-7947 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Jason Williams?
Please contact Dr. Williams's office at (408) 885-7947 for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. Jason Williams have?
Dr. Jason Williams is certified by the American Board of Internal Medicine.
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