(248) 273-9930
  • Make a Payment
  • Directions
Patient Portal

Gastrointestinal SpecialistsGastrointestinal Specialists

  • For Patients
    • Keeping You Safe
    • Your Appointment
    • Patient Forms
    • Procedure Preps
    • Insurance and Billing
    • Online Bill Pay
    • Identifying Different Colonoscopies
    • Patient Registration
  • Physicians
  • Services and Conditions
    • Services We Provide
    • Conditions We Treat
    • Colon Cancer Screening
    • Direct Access
  • Our Endoscopy Center
    • Patient Experience
    • Quality Care
    • Why Choose Us
    • Our Procedures
    • Colonoscopy Now
  • Contact Us
    • Phone Directory
    • Appointment Request
  • About Us

Named a 2025 Best Ambulatory Surgery Center by U.S. News & World Report

Learn More

Prioritizing Patient Care

Our physicians exceed national benchmarks for quality care.

Learn More

Celebrating Our Patient Experience Scores

Our Ratings Exceed National Averages

View Our Scores

Beat the Trend. Get Screened at 45!

More Young Adults Are Getting Colon Cancer.

Schedule Your Colonoscopy Today

Gastrointestinal Specialists, PC is Now Offering Telemedicine

Learn More about Telemedicine

How We're Keeping You Safe

Learn what steps we've added to keep you safe

Prevent Colon Cancer

Learn more about colon cancer screening.

Request an Appointment

Fill out the form to request an appointment.

About Us

Learn more about our office

Troy’s Best GI Doctors

Our gastroenterologists and staff at Gastrointestinal Specialists, PC and Gastrointestinal Endoscopy Center are dedicated to providing quality, affordable care to the community in our quest to lower colon cancer rates and treat an array of digestive diseases, including Crohn’s Disease, ulcerative colitis, irritable bowel syndrome (IBS) and gastroesophageal reflux disease (GERD).

We believe in compassionate medicine, where patients feel reassured and unrushed. We hold ourselves to the highest of standards, as the center is accredited by the Accreditation Association for Ambulatory Health Care (AAAHC).

Our board-certified GI doctors specialize in performing a myriad of GI procedures, including colonoscopy, upper endoscopy, esophageal dilation, flexible sigmoidoscopy, small bowel enteroscopy and video capsule endoscopy.

The physicians at Gastrointestinal Specialists, PC and Gastrointestinal Endoscopy Center not only meet but exceed U.S. benchmarks for quality in colonoscopy. See our scores.

Additionally, our patients value the compassionate care they receive from our GI doctors and say they are likely to recommend our center for GI procedures.

If you are due for a colonoscopy or need to see a gastroenterologist, don’t put it off any longer. Give us a call today!

Awards

Our patients appreciate our friendly staff and our state-of-the-art facility. Patient care is our top priority, and this is evidenced by our 2019 Press Ganey Guardian of Excellence Award for Patient Experience.

Learn More

For Your Visit

Gastrointestinal Specialists, PC and Gastrointestinal Endoscopy Center are committed to ensuring that your experience with us is relaxed and worry-free, from consultation through recovery. To assist us, we ask that you read and comply with all guidelines.

We’re pleased to partner with StopColonCancerNow.com to help boost colon cancer screenings and prevention for residents in greater Troy.

Patient Forms

At Gastrointestinal Specialists, PC, your time is as valuable to us as it is to you. That’s why we provide online access to a variety of forms you may complete before your visit. The following documents will help us expedite the check-in process for your appointment. Please take a moment to download and print the appropriate form(s).

Learn More
Insurance and Billing

Gastrointestinal Endoscopy Center accepts most major insurance. We will bill your insurance carrier; however, we cannot tell you what your policy will cover. Since your insurance policy and coverage are between you and your carrier, we urge you to contact them prior to your procedure. You will be responsible for any co-pays and deductibles.

Learn More

Our Physicians

View All Physicians
Andrew Aneese Andrew Aneese M.D. Jared S. Bortman Jared S. Bortman M.D. Michael C. Duffy Michael C. Duffy M.D. Gehad M. Ghaith Gehad M. Ghaith M.D. Maryconi M. Jacob Maryconi M. Jacob M.D. Dariusz A. Lazarczyk Dariusz A. Lazarczyk M.D. Brian Markle Brian Markle M.D. Priya Nethala Priya Nethala M.D. Fadi Odish Fadi Odish M.D. Ketan Rana Ketan Rana M.D.
4.8/5
4.8 /5
1,360 Reviews

Google
5.0/5
Jan 31, 2026
Google • Gastrointestinal Endoscopy Center

Wonderful staff, great experience! In and out fast! Would highly recommend!!

Google
5.0/5
Jan 31, 2026
Google • Gastrointestinal Endoscopy Center

I have been coming to this practice for years. Efficiently run and professional. Always receive outstanding care from Dr. Rana and the entire team.

Google
5.0/5
Jan 31, 2026
Google • Gastrointestinal Endoscopy Center

All aspects of process from intake billing, nursing and procedures and aftermath were performed in a highly professional manner!

Google
5.0/5
Jan 30, 2026
Google • Gastrointestinal Endoscopy Center

Going and having my colonoscopy was trouble free. The entire staff was exceptional and Dr Aneese was terrific. Thank you to everyone.

Google
5.0/5
Jan 30, 2026
Google • Gastrointestinal Endoscopy Center

Very caring environment. Professional and personal 👌. Great follow up.


More
Next
Recent Posts
Don’t ignore the signs: What Your Gut Might Be Telling You About Colon Cancer

Don’t ignore the signs: What Your Gut Might Be Telling You About Colon Cancer

Having stomach issues from time to time is a common occurrence. Maybe it’s that extra slice of pizza or a stressful day that throws your gut off balance. But sometimes, your gut isn’t just reacting to something you ate…it’s trying to tell you something important.

Read More
4 Simple Ways to Support Your Gut This Winter (through the holidays and beyond)

4 Simple Ways to Support Your Gut This Winter (through the holidays and beyond)

At Gastrointestinal Specialists, P.C. in Troy, Michigan, we’re here to help make sure you can enjoy the season and keep your gut running smoothly so it doesn’t hold you back from any festivities.

Read More
5 Simple Things to Help Your Gut Feel Better This Holiday Season (that aren't all about what you eat)

5 Simple Things to Help Your Gut Feel Better This Holiday Season (that aren't all about what you eat)

November is full of food and thanks, but it’s also a time when your gut health may need extra attention. Taking care of your digestive system isn’t just about what you eat: It’s also about how you feel.

Read More
View All Posts
  • Contact Us
  • Notice of Nondiscrimination
  • Notice of Privacy Practices
  • Internet Privacy Policy
  • Terms of Service
  • Billing Disclosure

2 Locations To Serve You

© 2026 Gastrointestinal Specialists