Dr. Mark H. Johnston
Overview
Mark Johnston is a Gastroenterologist in Lancaster, Pennsylvania. Dr. Johnston is rated as an Experienced provider by MediFind in the treatment of Hepatitis B. His top areas of expertise are Barrett Esophagus, Swallowing Difficulty, Painful Swallowing, Gastrectomy, and Endoscopy. Dr. Johnston is currently accepting new patients.
Insurance
Accepted insurance can change. Please verify directly with the provider.
Accepted insurance plans:
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- POS
- PPO
- MEDICARE PDP
- EPO
- HMO
- POS
- PPO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- OTHER MEDICARE PART D
- PPO
- EPO
- HMO
- PPO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE SNP
- OTHER MEDICARE PART D
- HMO
- POS
- PPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- PPO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE SNP
- EPO
- HMO
- PPO
- HMO
- INDEMNITY
- POS
- PPO
- EPO
- POS
- PPO
- OTHER MANAGED MEDICAID
- OTHER MEDICAID
- STATE MEDICAID
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE PART D
- EPO
- HMO
- PPO
- OTHER COMMERCIAL
- EPO
- HMO
- POS
- PPO
- EPO
- PPO
- EPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE
- OTHER MEDICARE PART D
Locations
2112 Harrisburg Pike, Suite 202, Lancaster, PA 17601
Additional Areas of Focus
Dr. Johnston has provided the following conditions as areas of focus. Please note that we may not have enough data to validate their experience in some of these conditions.
Johns Hopkins Health Care & Surgery Center - Green Spring Station, Lutherville
Natarajan Ravendhran is a hepatologist specializing in the diagnosis, treatment and management of liver diseases. He received his medical degree from Stanley Medical College, University of Madras in India, completed his residency in internal medicine at what is now Ascension Saint Agnes Hospital in Maryland and a residency in surgery at Railway Hospital in Madras, India. Dr. Ravendhran performed fellowship training in hepatology under the mentorship of Eugene and Leon Schiff at the University of Miami. Additionally, he received fellowship training in gastroenterology and liver disease at the University of Missouri. Dr. Ravendhran received a master’s degree in business administration in medical services management from The Johns Hopkins University. He is a fellow of the American Association for the Study of Liver Diseases and the American Gastroenterological Association, and is a member of the European Association for the Study of the Liver. Dr. Ravendhran is interested in exploring cholestatic disorders. He has participated in many clinical trials that focus on hepatitis B and C, in addition to metabolic dysfunction-associated steatotic liver disease trials. He enjoys teaching, rounding with fellows and seeing patients, and his motto is “Patients come first!”. Dr. Ravendhran is rated as a Distinguished provider by MediFind in the treatment of Hepatitis B. His top areas of expertise are Non-Alcoholic Fatty Liver Disease, Hepatitis, Visceromegaly, Enlarged Liver, and Endoscopy.
Saleh Alqahtani is a Gastroenterologist in Baltimore, Maryland. Dr. Alqahtani is rated as an Elite provider by MediFind in the treatment of Hepatitis B. His top areas of expertise are Non-Alcoholic Fatty Liver Disease, Obesity, Hepatitis, Liver Transplant, and Hepato-Pancreato-Biliary Surgery. Dr. Alqahtani is currently accepting new patients.
Kyong-mi Chang is a Gastroenterologist in Philadelphia, Pennsylvania. Dr. Chang is rated as an Advanced provider by MediFind in the treatment of Hepatitis B. Her top areas of expertise are Hepatitis B, Hepatitis, Non-Alcoholic Fatty Liver Disease, and Hepatitis C.
Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
- Advanced
- Barrett EsophagusDr. Johnston isAdvanced. Learn about Barrett Esophagus.
- Benign Esophageal StrictureDr. Johnston isAdvanced. Learn about Benign Esophageal Stricture.
- ColitisDr. Johnston isAdvanced. Learn about Colitis.
- Crohn's DiseaseDr. Johnston isAdvanced. Learn about Crohn's Disease.
- EsophagitisDr. Johnston isAdvanced. Learn about Esophagitis.
- Gastroesophageal Reflux Disease (GERD)
- Experienced
- AchalasiaDr. Johnston isExperienced. Learn about Achalasia.
- Acute PancreatitisDr. Johnston isExperienced. Learn about Acute Pancreatitis.
- Alcoholic CirrhosisDr. Johnston isExperienced. Learn about Alcoholic Cirrhosis.
- AnemiaDr. Johnston isExperienced. Learn about Anemia.
- Angiodysplasia of the ColonDr. Johnston isExperienced. Learn about Angiodysplasia of the Colon.
- AscitesDr. Johnston isExperienced. Learn about Ascites.