Dr John David Horwhat, MD - Medicare Gastroenterology in Lancaster, PA

Dr John David Horwhat, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Lancaster, Pennsylvania. He went to Temple University School Of Medicine and graduated in 1992 and has 32 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Regional Gastroenterology Associates Of Lancaster, Ltd. and his current practice location is 2112 Harrisburg Pike, Suite 202, Lancaster, Pennsylvania. You can reach out to his office (for appointments etc.) via phone at (717) 544-3500.

Dr John David Horwhat is licensed to practice in Pennsylvania (license number MD053834L) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1487747242.

Contact Information

Dr John David Horwhat, MD
2112 Harrisburg Pike, Suite 202,
Lancaster, PA 17601-2644
(717) 544-3500
(717) 544-3501

Map and Direction




Physician's Profile

Full NameDr John David Horwhat
GenderMale
SpecialityGastroenterology
Experience32 Years
Location2112 Harrisburg Pike, Lancaster, Pennsylvania
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr John David Horwhat attended and graduated from Temple University School Of Medicine in 1992
  NPI Data:
  • NPI Number: 1487747242
  • Provider Enumeration Date: 10/02/2006
  • Last Update Date: 03/07/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 3779661541
  • Enrollment ID: I20130204000040

Medical Identifiers

Medical identifiers for Dr John David Horwhat such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1487747242NPI-NPPES
1027860230001MedicaidPA
MD053834LOtherPALICENSE
264171KKUOtherPAMEDICARE
1027860230003MedicaidPA
P10842468OtherPARR MEDICARE

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology MD053834L (Pennsylvania)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Lancaster General HospitalLancaster, PAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Regional Gastroenterology Associates Of Lancaster, Ltd.4688575434239

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr John David Horwhat allows following entities to bill medicare on his behalf.
Entity NameRegional Gastroenterology Associates Of Lancaster, Ltd.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1154422806
PECOS PAC ID: 4688575434
Enrollment ID: O20040115000777

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr John David Horwhat is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr John David Horwhat, MD
2112 Harrisburg Pike Ste 202,
Lancaster, PA 17601-2644

Ph: (717) 869-4600
Dr John David Horwhat, MD
2112 Harrisburg Pike, Suite 202,
Lancaster, PA 17601-2644

Ph: (717) 544-3500

Reviews and Comments


Internal Medicine Doctors in Lancaster, PA

Kaci Elizabeth Christian, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 2112 Harrisburg Pike Ste 202, Lancaster, PA 17601
Phone: 717-869-4600    Fax: 717-544-3501
Nancy L Adamopoulos, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 555 N Duke St, Lancaster, PA 17602
Phone: 717-544-8144    
Mark H Johnston, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 2112 Harrisburg Pike, Suite 202, Lancaster, PA 17601
Phone: 717-544-3500    Fax: 717-544-3501
John B Fileta, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 1254 Lititz Pike, Lancaster, PA 17601
Phone: 717-397-4724    
Charles R Rost, M.D.
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 2112 Harrisburg Pike, Suite 200, Lancaster, PA 17601
Phone: 717-544-3059    Fax: 717-544-3638
Dr. Paul David Allegretti, D.O.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 2112 Harrisburg Pike, Suite 202, Lancaster, PA 17601
Phone: 717-544-3500    Fax: 717-544-3501
Elyse Goveia, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 555 N Duke St, Lancaster, PA 17602
Phone: 717-544-4940    

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.