Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Williams, Gastroenterologist in Madison, WI?
Dr. John Williams, MD is a Gastroenterologist, who primarily practices in Madison, WI with 1 additional practice location. Dr. Williams graduated from Saint Louis University School of Medicine. Dr. Williams is fluent in English, and is currently seeing new patients. Dr. Williams’s practice accepts Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Williams’s office at (608) 890-5000.
Where did Dr. Williams go to medical school and complete their residency?
Medical School: Saint Louis University School of 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:
- 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:
- Other Specific B Vitamin Deficiency
- B Vitamins
- Malnutrition
- Specific B Vitamin Shortage
- Less Common B Vitamin Deficiency
- Rare B Vitamin Deficiency
ICD-10 Codes:
- E538: Deficiency of other specified B group vitamins
Also known as:
- Ulcerative Colitis
- Chronic Pancolitis with Complications
- Extensive Ulcerative Colitis with Complications
- Inflammatory Bowel Disease (IBD) with Complications
ICD-10 Codes:
- K51019: Ulcerative (chronic) pancolitis with unspecified complications
Also known as:
- Crohn's Disease of the Small Intestine with Bowel Blockage
- Crohn's Disease
- Intestinal Obstruction
- Crohn’s Disease
- Small Bowel Crohn's with Obstruction', 'Ileitis with Intestinal Blockage', 'Bowel Obstruction from Crohn's
ICD-10 Codes:
- K50012: Crohn's disease of small intestine with intestinal obstruction
Also known as:
- Chronic Stomach Inflammation
- Stomach Disorder
- Gastritis & Gastropathy
- Chronic gastritis
- Long-term stomach inflammation
- Persistent stomach lining inflammation
ICD-10 Codes:
- K2950: Unspecified chronic gastritis without bleeding
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
Also known as:
- Hemorrhoids
- Piles
- Anal veins
- Swollen rectal veins
ICD-10 Codes:
- K648: Other hemorrhoids
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
- 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)
Does Dr. Williams accept my insurance?
Dr. Williams accepts most major insurance plans. Important: Please call our office at (608) 890-5000 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Williams accept in Madison, WI?
Dr. Williams in Madison, WI accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Baptist Health System
Care Wisconsin Health Plan
Centene
Group Health Cooperative
Medicare
MedImpact
Molina
State of Tennessee
State of Wisconsin
UnitedHealthcare
View All Insurances
Where is Dr. Williams' office located?
Dr. John Williams' Primary Practice
20 S Park St Ste 207
Madison, WI 53715
(608) 890-5000
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 1265516421.
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. John Williams's specialty?
Dr. Williams is a Gastroenterologist near Madison, WI. 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. John Williams affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Williams is affiliated with UW Health University Hospital, Bellin Health Oconto 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 John Williams accepting new patients in Madison, WI?
Yes, Dr. John Williams is accepting new patients at this time.
Does Dr. John Williams offer online booking?
Please contact Dr. Williams's office at (608) 890-5000 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with John Williams?
Please contact Dr. Williams's office at (608) 890-5000 for information regarding telehealth appointment availability or for scheduling assistance.
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