AG
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Guillaume, Gastroenterologist in East Setauket, NY?
Dr. Alexandra Guillaume, MD is a Gastroenterologist, who primarily practices in East Setauket, NY with 2 additional practice locations. Dr. Guillaume is fluent in English, and is currently seeing new patients. Dr. Guillaume’s practice accepts Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Guillaume’s office at (631) 444-5220.
What languages does Dr. Guillaume speak?
Dr. Guillaume and their clinical team can communicate with patients in the following languages:
English
What conditions does Dr. Guillaume treat?
As a Gastroenterologist, Dr. Guillaume 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. Guillaume. 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:
- Intestinal Malabsorption
- Malabsorption Syndromes
- Nutrient Malabsorption
- Digestive Malabsorption
- Malabsorption Disorder
ICD-10 Codes:
- K9089: Other intestinal malabsorption
Also known as:
- Difficulty Swallowing
- Swallowing Disorder
- Dysphagia
- Trouble swallowing
- Painful swallowing
ICD-10 Codes:
- R1310: Dysphagia, unspecified
Also known as:
- Constipation
- Difficulty Passing Stool
- Infrequent Bowel Movements
- Hard Stools
ICD-10 Codes:
- K5900: Constipation, unspecified
Also known as:
- Colon Polyps
- Colonic Polyps
- Colorectal polyps
- Bowel polyps
- Intestinal polyps
ICD-10 Codes:
- K635: Polyp of colon
Also known as:
- Abdominal Pain
- Stomach Ache
- Belly Pain
- Stomach Pain
ICD-10 Codes:
- R109: Unspecified abdominal pain
What procedures does Dr. Guillaume perform?
As a Gastroenterologist, Dr. Guillaume 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. Guillaume. 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 Polyp Removal
- Colonoscopy with Biopsy
- Diagnostic Colonoscopy with Biopsy
- Colonoscopy
- Colorectal Cancer Screening Tests
- Flexible Colonoscopy with Polypectomy
- Colon Polyp Removal
- Colorectal Lesion Excision
- Flexible Colonoscopy
- Colon Biopsy
- Large Intestine Scope
- Colorectal Cancer Screening
- Colon Exam with Biopsy
- Lower Endoscopy
- Colon Cancer Screening
CPT Codes:
- 45385: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
- 45380: Colonoscopy, flexible; with biopsy, single or multiple
- 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. Guillaume accept my insurance?
Dr. Guillaume accepts most major insurance plans. Important: Please call our office at (631) 444-5220 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Guillaume accept in East Setauket, NY?
Dr. Guillaume in East Setauket, NY accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
All Other Third Party
ArcBest Corporation
Corporate Services
CVS Health (formerly Aetna)
EmblemHealth
Express Scripts
Medicare
National Benefit Fund
Service Employees International Union (SEIU)
State of Tennessee
View All Insurances
Where is Dr. Guillaume's office located?
Dr. Alexandra Guillaume's Primary Practice
26 Research Way
East Setauket, NY 11733
(631) 444-5220
Dr. Alexandra Guillaume's Practice 3
3 Technology Dr
East Setauket, NY 11733
(631) 444-5220
What is Dr. Guillaume's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Guillaume's National Provider Identifier (NPI) number is 1396981197.
What common questions do patients ask about Dr. Guillaume?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Guillaume
What is Dr. Alexandra Guillaume's specialty?
Dr. Guillaume is a Gastroenterologist near East Setauket, NY. 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. Guillaume to book an appointment today.
Is this Dr. Alexandra Guillaume affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Guillaume is affiliated with Stony Brook University Hospital, North Shore University Hospital, Ascension NE Wisconsin - St. Elizabeth Campus, Long Island Jewish Medical Center 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 Alexandra Guillaume accepting new patients in East Setauket, NY?
Yes, Dr. Alexandra Guillaume is accepting new patients at this time.
Does Dr. Alexandra Guillaume offer online booking?
Please contact Dr. Guillaume's office at (631) 444-5220 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Alexandra Guillaume?
Please contact Dr. Guillaume's office at (631) 444-5220 for information regarding telehealth appointment availability or for scheduling assistance.
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