Expertise in
16
conditions
Expertise in
16
conditions
2112 Harrisburg Pike, Suite 202, 
Lancaster, PA 

Overview

John D. Horwhat, MD, specializes in gastroenterology. He is affiliated with UPMC Lititz. Dr. Horwhat completed his fellowships at Duke University Medical Center and Walter Reed National Military Medical Center, residency at Madigan Army Medical Center and medical degree at Temple University.

Dr. Horwhat is rated as an Experienced provider by MediFind in the treatment of Lymphocytic Colitis. His top areas of expertise are Bile Duct Obstruction, Acute Pancreatitis, Barrett Esophagus, Endoscopy, and Gastrectomy.

His clinical research consists of co-authoring 11 peer reviewed articles. MediFind looks at clinical research from the past 15 years.

Graduate Institution
Temple University
Residency
Madigan Army Medical Center
Specialties
Gastroenterology
Licenses
Internal Medicine in PA
Board Certifications
Gastroenterology, 2000
Fellowships
Walter Reed National Military Medical Center
Hospital Affiliations
Lancaster General Hospital
Languages Spoken
English
Gender
Male

Insurance

Accepted insurance can change. Please verify directly with the provider.

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Accepted insurance plans:

Aetna
  • EPO
  • HMO
  • POS
  • PPO
Anthem
  • EPO
  • HMO
  • POS
  • PPO
Avalon Health Care
  • MEDICARE PDP
Capital Blue Cross
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • OTHER MEDICARE PART D
  • PPO
CareFirst
  • HMO
  • POS
  • PPO
Cigna
  • EPO
  • HMO
  • PPO
Gateway Health Plan
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE SNP
  • OTHER MEDICARE PART D
Geisinger
  • HMO
  • POS
  • PPO
Health Care Services Corporation
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • OTHER COMMERCIAL
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
  • PPO
Highmark
  • EPO
  • HMO
  • PPO
Humana
  • HMO
  • INDEMNITY
  • POS
  • PPO
Independent Health
  • EPO
  • POS
  • PPO
Managed Medicaid
  • OTHER MANAGED MEDICAID
Medicare
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • MEDICARE-MEDICAID PLAN
  • OTHER MEDICARE PART D
Oscar
  • EPO
  • HMO
  • PPO
PA Health and Wellness
  • HMO
  • MANAGED MEDICAID PLAN
Trustmark
  • PPO
UnitedHealthcare
  • EPO
  • HMO
  • POS
  • PPO
UPMC
  • EPO
  • PPO
Wellcare
  • EPO
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • MEDICARE-MEDICAID PLAN
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
View 15 Less Insurance Carriers -

Locations

Regional GI
2112 Harrisburg Pike, Suite 202, Lancaster, PA 17601
Other Locations
Regional GI
4140 Oregon Pike, Ephrata, PA 17522

Additional Areas of Focus

Dr. Horwhat 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.

Peptic Ulcer
Lymphocytic Colitis
Intestinal Pseudo-Obstruction
Esophagitis
Esophageal Varices
Non-Alcoholic Fatty Liver Disease
Collagenous Colitis
Eosinophilic Esophagitis
Gastroparesis
Ulcerative Colitis
Jaundice
Gallstones
Lactose Intolerance
Chronic Pancreatitis
Short Bowel Syndrome
Bowel Incontinence
Lynch Syndrome
Diarrhea
Acute Pancreatitis
Nonalcoholic Steatohepatitis (NASH)
Cirrhosis
Achalasia
View 12 Less Areas of Focus-

Clinical Research

Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.


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Peter Park is a Gastroenterologist in Abingdon, Maryland. Dr. Park is rated as a Distinguished provider by MediFind in the treatment of Lymphocytic Colitis. His top areas of expertise are Diverticular Disease, Swallowing Difficulty, Painful Swallowing, Endoscopy, and Colonoscopy.

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 (2.2 miles away)
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Melissa G. Morgan, DO, specializes in gastroenterology. She is affiliated with UPMC Lititz. Dr. Morgan completed her fellowship and residency at Lankenau Medical Center and medical degree at Philadelphia College of Osteopathic Medicine. Dr. Morgan is rated as an Advanced provider by MediFind in the treatment of Lymphocytic Colitis. Her top areas of expertise are Alcoholic Cirrhosis, Visceromegaly, Crohn's Disease, Gastrectomy, and Endoscopy.

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John Michel is a Gastroenterologist in Camp Hill, Pennsylvania. Dr. Michel is rated as a Distinguished provider by MediFind in the treatment of Lymphocytic Colitis. His top areas of expertise are Gastroesophageal Reflux Disease (GERD), Painful Swallowing, Swallowing Difficulty, Gastrectomy, and Colonoscopy.

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

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