Kevin Sieja MD
Kevin Sieja MD is a Gastroenterologist practice in Denver, CO. Rated 4.8 from 240 public reviews. Phone and website are listed.

Address
4500 E 9th Ave Ste 720S, Denver, CO 80220
Denver, CO 80220
Phone
(303) 861-0808Website
Visit listed websiteListing updates
Request a correction or opt-outCredentials, affiliations, and coverage
Credentials and licenses
- MD
- MEDICAL DOCTOR
- Professional license · CO
- Professional license · CO
Affiliations
- COLORADO GASTROENTEROLOGY PROF LLC
- DENVER DIGESTIVE HEALTH SPECIALISTS INC
Sources
- CMS National Provider Directory · checked Aug 31, 2026
- cms-doctors-clinicians · checked Aug 29, 2026
- google-maps-octoparse-local · checked Aug 29, 2026
Federal data is attributed to its source and does not imply CMS endorsement.
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Newest reviews
Nelson Ventura
I had a great experience. The staff(including MD)were professional, thorough, provided explanations before initiating care, and addressed my needs as they came up.
Rob Jenkins
The procedure was a total success and the nurses were so professional and so was the doctor and anesthesiologist,I'd recommend this place to anyone in need of a colonascopy for a better chance to prolong their life. Thank you so much Denver Endoscopy Center for a new lease on Life
Christina Nagle
Doctor and nurses were great. Instructions were very clear and easy to follow. The whole process was far less scary and difficult than I imagined. Pretty easy and definitely a relief to have the cancer screening completed with no issues.
Lori Wise
Dr. Seija, the nurses, and his staff were compassionate, comforting and professional.
John Schultz
Great experience. Very clear instructions about my preparation starting 2 weeks before my colonoscopy. Plenty of reminders along the way. All of the staff were friendly and did an excellent job. Dr. Siena is also great and has been my gastroenterologist for many years. Facility was clean, professional and on time. Propofol for my sedation was wonderful. Worked great and no hangover.
Shelley Person
Colonoscopy was a good experience. No one looks forward to having one but when it’s over you can honestly say not a bad experience. You just sleep through it. The hardest part is the prep.
Walter Jenkins II
No written review was provided.
Tom Michel
No written review was provided.
Ann Hinrichs
No written review was provided.
Tony Bustos
Went in received , treated like a king everything explained. Came out they even checked up on me afterwards great place ... well done




