Patient Reviews

Reviews reflect patients' level of satisfaction with the care they received from this provider. Dr. Dennis Ahnen xhas an overall rating of 4.8.


Dr. Dennis Ahnen, MD is a Doctor primarily located in Boulder, CO, with other offices in Lakewood, CO and Longmont, CO. He has 43 years of experience. His specialties include Gastroenterology and Internal Medicine. Dr. Ahnen is affiliated with Littleton Adventist Hospital, Saint Joseph Hospital and Boulder Community Health. He speaks English.


Patients rate and review their physicians based on criteria of care including bedside manner, doctor-patient face time, and degree of follow-up. Patients also provide their doctor with an overall ratings. Vitals analyzes these ratings annually, along with other quality measures, to identify and award the top physicians.


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Locations & Directions

Gastroenterology of The Rockies

1755 48th St
Boulder, CO 80301

Kevin Scott Sieja MD

13952 Denver West Pkwy
Lakewood, CO 80401

Gastroenterology of The Rockies

1551 Professional Ln
Longmont, CO 80501

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