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Dr. Alexandra Guillaume, MD

Gastroenterology*
3.7 (3)
Map Pin Small East Setauket, NY
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18 years of experience

Overview of Dr. Alexandra Guillaume, MD

Dr. Alexandra Guillaume, MD is a Gastroenterology Specialist in East Setauket, NY. They specialize in Gastroenterology, has 18 years of experience, and is board certified in Gastroenterology. They graduated from Tufts University and is affiliated with Stony Brook University Hospital, Ellis Hospital and Saint Joseph's Hospital Health Center. Patients rated Dr. Guillaume an average 3.7 star rating.

Dr. Guillaume works at Practice in East Setauket, NY with other offices in Green Bay, WI, Stony Brook, NY and Syracuse, NY. They frequently treat conditions like Gastrointestinal Malabsorption, Constipation and Diaphragmatic and Hiatal Hernia along with other conditions at varying frequencies. Please call ahead to schedule an appointment and to confirm all accepted insurance plans.

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Dr. Guillaume's Office Locations

  1. 1
    Stony Brook Univ. Hosp. Ob. & Gyn.
    3 Technology Dr Ste 300, East Setauket, NY 11733 Icon Directions Right Arrow Directions Phone Icon (631) 444-5220
    Monday
    Closed
    Tuesday
    08:00 - 16:30
    Wednesday
    Closed
    Thursday
    Closed
    Friday
    Closed
    Saturday
    Closed
    Sunday
    Closed
  2. 2
    Baycare Aurora LLC
    2845 Greenbrier Rd, Green Bay, WI 54311 Icon Directions Right Arrow Directions Phone Icon (920) 288-8169
  3. 3
    Stony Brook University Hospital
    101 Nicolls Rd, Stony Brook, NY 11794 Icon Directions Right Arrow Directions Phone Icon (631) 444-5220
  4. 4
    St. Joseph's Hospital Health Center
    301 Prospect Ave, Syracuse, NY 13203 Icon Directions Right Arrow Directions Phone Icon (315) 448-5111

Hospital Affiliations
Admitting Hospitals

Admitting hospitals are where the provider is credentialed to see patients, perform procedures, and send patients for continuous care.

  • Stony Brook University Hospital
  • Ellis Hospital
  • Saint Joseph's Hospital Health Center

Experience & Treatment Frequency

NEW FEATURE

What is treatment frequency?

Our treatment frequency feature helps you understand howoften a provider performs or treats a specificprocedure/condition compared to other doctors. Providersrank in one of four frequency categories:

Very HighFrequency
HighFrequency
NormalFrequency
May Perform

Specific procedures/conditions that don’t haveenough data are indicated with “May Perform”. We encourageyou to contact the provider with questions about theirexperience.

Search for conditions or procedures.
Gastrointestinal Malabsorption
Constipation
Diaphragmatic and Hiatal Hernia
Gastrointestinal Malabsorption
Constipation
Diaphragmatic and Hiatal Hernia

Treatment frequency



Many providers have expertise treating multiple conditions or procedures. FindCare uses a variety of data sources to determine which conditions or procedures a provider treats and their level of experience.
Gastrointestinal Malabsorption
Constipation
Diaphragmatic and Hiatal Hernia
Duodenal Ulcer
Abdominal Pain
Acute Gastritis
Anal or Rectal Pain
Anemia
  • View other providers who treat Anemia
Barrett's Esophagus
Chronic Gastritis
Colorectal Polyp
Dehydration
Diarrhea
  • View other providers who treat Diarrhea
Duodenitis
Dysphagia
Eosinophilic Esophagitis
Esophageal Achalasia and Cardiospasm
Esophageal Motility Disorders
Esophageal Ulcer
Esophagitis
Gas-Bloat Syndrome
Gastric Ulcer
Gastritis
Gastroesophageal Reflux Disease (GERD)
Gastrointestinal Bleeding
Gastroptosis
Heartburn
Hemorrhoids
Intestinal Diverticulosis
Intestinal Ulcer
Lactose Intolerance
Malnutrition
Nausea
  • View other providers who treat Nausea
Non-Alcoholic Fatty Liver Disease
Noninfectious Gastroenteritis and Colitis
Reflux Esophagitis
Vomiting Disorders
Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
Duodenal Polypectomy
Endoscopy (Esophagus, Stomach, Small Intestine)
ERCP (Endoscopic Retrograde Cholangiopancreatography)
Flexible Sigmoidoscopy
Manometry
Removal or Destruction of Rectal or Intestinal Tumor (incl. Colonoscopy, Proctosigmoidoscopy, Sigmoidoscopy and Control of Hemorrhage)
Rigid Proctosigmoidoscopy
Benign Neoplasm of the Digestive System
Biliary Cirrhosis
Celiac Disease
Cirrhosis
Congenital Achalasia
Congenital Anomaly Esophagus
Crohn's Disease
Cyclical Vomiting Syndrome
Cystic Fibrosis
Diffuse Esophageal Spasm
Duodenal Cancer
Dysentery
Enteritis
Eosinophilic Gastritis
Esophageal Diverticulum
Esophageal Varices
Familial Adenomatous Polyposis
Food Allergy
Gallstones
Gastrojejunal Ulcer
Gastroparesis
Hemochromatosis
Hepatitis B
Hepatitis B - Immune Response
Hepatitis C
Hernia
  • View other providers who treat Hernia
Hiatal Hernia
Hiatal Hernia with Obstruction
Ileus
  • View other providers who treat Ileus
Indigestion
Infectious Diarrheal Disease
Inflammatory Bowel Disease
Intestinal Diverticulitis
Intestinal Obstruction
Intestinal Prolapse
Irritable Bowel Syndrome
Ischemic Colitis
Liver Damage from Alcohol
Neurogenic Bowel
Pancreatitis
Peptic Ulcer
Primary Biliary Cholangitis
Proctoptosis
Pyloric Stenosis
Rectal Prolapse
Retroperitoneum Cancer
Stomal Ulcer
Ulcerative Colitis
Unexplained Weight Loss
Upper Digestive Tract Cancer
Viral Enteritis
Viral Hepatitis
Vitamin B12 Anemia
Vitamin_Deficiency
Colon Cancer Screening
Colorectal Cancer Screening
Fecal Impaction Removal
Gallbladder Scan
Hepatitis A Screening
Hepatitis B Virus Screening
Hepatitis C Virus Screening
Hepatitis Screening
Impedance Testing
Instrumental Diagnostic Evaluation for Dysphagia
Liver Biopsy
Liver Function Test
pH Probe
  • View other providers who treat pH Probe
Screening Colonoscopy
Ultrasound, Endoanal
Ultrasound, Esophageal
VAP Lipid Testing
Wireless pH Testing
Check your insurance
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    Please double-check when making an appointment.

    View All Accepted Carriers

    • Aetna
    • Aspirus Network, Inc.
    • Blue Cross Blue Shield
    • Capital District Physician's Health Plan (CDPHP)
    • Cigna
    • Connecticare
    • EmblemHealth
    • Empire Blue Cross Blue Shield
    • Excellus BlueCross BlueShield
    • Fidelis Care
    • MagnaCare
    • MVP Health Care
    • Oxford Health Plans
    • UnitedHealthCare

    * Please verify this information when scheduling an appointment.

    Ratings & Reviews
    Reviews are displayed in date order and collected from patients who have agreed to reporting accurate and fair reviews. Providers with no reviews may have a new FindCare profile, or no submitted reviews on FindCare yet.

    Learn more about how FindCare's ratings and reviews work

    3.7
    Average provider rating
    Based on 3 ratings
    Patient Ratings (3)
    5 Star
    (2)
    4 Star
    (0)
    3 Star
    (0)
    2 Star
    (0)
    1 Star
    (1)
    Leave a review

    How was your appointment with Dr. Guillaume?

    Read more reviews on Healthgrades
    Photo: Dr. Alexandra Guillaume, MD
    How would you rate your experience with Dr. Alexandra Guillaume, MD?
    • Likelihood of recommending Dr. Guillaume to family and friends

    Dr. Guillaume's Office & Staff

    • Ease of scheduling urgent appointments
    • Office environment, cleanliness, comfort, etc.
    • Staff friendliness and courteousness
    • Total wait time (waiting & exam rooms)

    Experience with Dr. Guillaume

    • Level of trust in provider's decisions
    • How well provider explains medical condition(s)
    • How well provider listens and answers questions
    • Hpends appropriate amount of time with patients

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    About Dr. Alexandra Guillaume, MD

    Specialties*
    • Gastroenterology

    • *Healthline does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
    Specialties*
    Years of Experience
    • 18 years of experience
    Years of Experience
    Years of experience represents how long a provider has been practicing in their field since graduating from medical school. Not all providers will have this information available.
    Languages Spoken
    • English
    Languages Spoken
    NPI Number
    • 1396981197
    NPI Number
    A National Provider Identifier (NPI) is a unique 10-digit identifier issued by the government to healthcare providers.

    Education & Certifications

    Medical Education
    • Tufts University
    Medical Education
    Board Certifications
    • Gastroenterology
    Board Certifications
    What’s a board certification and why is it important that my provider has one?

    A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.

    Frequently Asked Questions

    Dr. Guillaume has indicated that they do offer telehealth services. Please call the provider’s office at for more information.

    Dr. Guillaume has seen patients for Gastrointestinal Malabsorption, Constipation and Diaphragmatic and Hiatal Hernia, and more. You can see other conditions treated by Dr. Guillaume on their profile. Please call the provider’s office to confirm all visit reasons.

    3 patients have reviewed Dr. Guillaume. The overall rating for this provider is 3.7. You can read verified reviews and ratings and leave your own review based on your experience with Dr. Guillaume.

    Whether a person prefers to schedule an appointment online or over the phone with Dr. Guillaume, there are benefits to both methods. A person calling to schedule an with Dr. Guillaume appointment can ask questions about the practice, provider availability, conditions treated, procedures performed, and if their insurance carrier is accepted. While online scheduling is quicker, easier, allows one to view a wide range of appointment times, and may provide the ability to sync with a personal calendar.

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