Colon Cancer Screening Please call our office for more information about our Open Access colon cancer screening. 301.288.1319 Digestive Care Specialists Holy Cross Germantown Medical Office Building 19851 Observation Dr., #245 Germantown, MD 20876 Frederick Location 165 Thomas Johnson Dr. Suite B Frederick, MD 21702 Phone: 301-288-1319 Send an email » Recent Articles Gastric Balloon at The Silhouette Clinic in Virginia and Maryland Non-surgical Alternatives to Gastric Bypass: A Deeper Dive How to Lose Belly Fat, 6 Helpful Tips. Endoscopic Sleeve Gastroplasty, a new minimally invasive weight loss surgery option in Virginia. Best Gastric Balloon for weight loss.