
Oregon Pike
Doctors Office: This is where you go for regular check-ups and consultations.
Endoscopy Center: This is where you go for medical procedures, including colonoscopies, ultrasounds, studies, and more.
4140 Oregon Pike, Ephrata, PA 17522 Get Directions
Office Information
OFFICE HOURS

MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Lisa J. Yoo, DO
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Dale Whitebloom, DO
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
David M. Smith, MD
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Evan Shelby, MD
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Heather E. Sauder, MSN, CRNP
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Dolores K. Rigano, MSN, CRNP
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Alison Platt, DO
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Ameet Parikh, MD
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Rajesh Panchwagh, DO, FACP
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Melissa Morgan, DO
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Robert J. Martin, MSN, CRNP
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Clifford T. Lomboy, MD
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Mehul Lalani, MD
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Ketan Kulkarni, MD
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
J. David Horwhat, MD, FACG, FASGE
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Kaci E. Christian, MD
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Joseph Chapman, DO
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Scott Douglas, MD
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Andrew Lee, MD
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Andrew Gemmell, PA-C
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Staci Johnston, CRNP
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Charles Mikulka, PA-C
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Amanda Long, DO
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Kelly Gast, PA-C
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Elizabeth Camerino, PA-C
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Hannah Schepers, PA-C
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MD: A doctor of medicine, also known as an M.D., graduated from a traditional medical school.
DO: A doctor of osteopathic medicine graduated from a U.S. osteopathic medical school.
Advanced practice providers, including nurse practitioners and physician assistants are healthcare professionals who have advanced degrees and clinical training. In addition to examining and educating patients, they can order tests, prescribe medications and perform certain procedures.
Sharon Felices, CRNP
Go to provider profilePatient Forms
- RGI Historial Medico Del Paciente (688 KB)
- RGI Medical History Form (167 KB)
- RGI Release Of Info Form (66 KB)
Prep Instructions for Procedures
- Colonoscopy Preparation Instructions, Standard Split Prep (133 KB)
- Upper Endoscopy (EGD), Endoscopic Ultrasound (EUS) or ERCP Preparation (58 KB)
- Alta Endoscopia (EGD) o ERCP Preparación (185 KB)
- Bowel Prep with Prepopik (82 KB)
- Miralax/Gatorade Colonoscopy Preparation—2 Day Prep (53 KB)
- Capsule Endoscopy Preparation (55 KB)
- Flexible Sigmoidoscopy Preparation Instructions (52 KB)
- Español Instrucciones de Dosis Dividida—Prepopik Preparación (307 KB)
- Español Preparación De Colonoscopia Miralax Dosis Dividida (199 KB)
- Español Preparación de Miralax (2) Dos Dias para la Colonoscopia (152 KB)
- Español Preparación Para Flexible Sigmoidoscopy (182 KB)
- Español Preparación Para Una Capsular Endoscopia (271 KB)