Clinical Interests
- Motility disorders of the esophagus, stomach, small intestine and colon
- Achalasia
- GERD
- Gastroparesis
- Dyspepsia
- Chronic constipation
- Fecal incontinence
Research Interests
- Evaluation and treatment of GI motility disorders including gastroparesis, GERD, constipation
- Development of noninvasive tests to measure gastric emptying and gastric accommodation after ingestion of a solid meal.
- New pharmaceutical treatments for gastroparesis and functional dyspepsia
- Use of impedance during esophageal manometry and esophageal pH monitoring to assess transit and reflux
Education
- MD, Case Western Reserve University, Cleveland, OH
Training
- Fellowship (Gastroenterology Research), Mayo Clinic Medical School, Rochester, MN
- Fellowship, Gastroenterology, Hospital of the University of Pennsylvania, Philadelphia, PA
- Residency, Internal Medicine, Johns Hopkins Hospital, Baltimore, MD
Board Certifications
- American Board of Internal Medicine - Internal Medicine
- American Board of Internal Medicine - Gastroenterology
Memberships
- American Gastroenterological Association
- American Neurogastroenterology and Motility Society
- American College of Gastroenterology
- American Society for Gastrointestinal Endoscopy
Awards and Honors
- Top Doctors, Gastroenterology, Philadelphia magazine, 2015-2016, 2018-2026
- Department of Medicine Research Award
- Best Doctors in America®, Gastroenterology, 2015-2016, 2017-2018, 2019-2020
Treatment Philosophy
My approach to patient care includes obtaining a careful patient history of the symptoms, obtaining carefully selected tests to evaluate the patient's symptoms, reviewing the results of the tests with the patient and deciding on the appropriate treatment for the symptoms and disorder together.
Patient Comments
Dr Parkman listened very well. He explained what he thought my problems may be and he explained the test he was ordering and why he was ordering.
I am very pleased with the care Dr. Parkman has given to me. [...]
Dr. Parkman has been a wonderful doctor and has helped me so very much. I also like him as a person. He is very thorough and friendly.
I know Dr. Parkman is very knowledgeable in his field and is the best in the area in regards to treatment of Gastroparesis, but it is very disheartening to have been a patient there for so many years and to walk in to his office and he hasn't even taken 2 minutes to look over my chart. [...] I would wait in the room an extra 5 minutes for him to at least read the summary from my last visit so he knows a fraction about who I am as a patient.
Horrible, dr did not listen to anything I talked about he picked his nail the entire time. I was rushed out of the appt and the entire time I told him the test I had done already, I came to see him to have an out of the box type of appt to maybe think a little more then the normal and that was not the case.