John K Derderian, DO - Medicare Internal Medicine in Lancaster, PA

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John K Derderian, DO is a medicare enrolled "Internal Medicine" physician in Lancaster, Pennsylvania. He went to Philadelphia College Of Osteopathic Medicine and graduated in 2000 and has 26 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Lancaster General Hospital and his current practice location is 555 N Duke St, Lancaster, Pennsylvania. You can reach out to his office (for appointments etc.) via phone at (717) 544-5511.

John K Derderian is licensed to practice in Pennsylvania (license number OS011857) 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 1477595445.

Contact Information

John K Derderian, DO
555 N Duke St,
Lancaster, PA 17602-2250
(717) 544-5511
Not Available

Map and Direction




Physician's Profile

Full NameJohn K Derderian
GenderMale
SpecialityInternal Medicine
Experience26 Years
Location555 N Duke St, 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:
  • John K Derderian attended and graduated from Philadelphia College Of Osteopathic Medicine in 2000
  NPI Data:
  • NPI Number: 1477595445
  • Provider Enumeration Date: 06/12/2006
  • Last Update Date: 11/01/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 7113917089
  • Enrollment ID: I20040513000583

Medical Identifiers

Medical identifiers for John K Derderian such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1477595445NPI-NPPES
100820028MedicaidPA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine OS011857 (Pennsylvania)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Lancaster General Hospital1254240039477

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. John K Derderian allows following entities to bill medicare on his behalf.
Entity NameTower Health Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1609291350
PECOS PAC ID: 7618889213
Enrollment ID: O20040311000072
Entity NameReading Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1992387518
PECOS PAC ID: 7618886490
Enrollment ID: O20040408001076
Entity NamePhoenixville Clinic Company Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1891866182
PECOS PAC ID: 5799796850
Enrollment ID: O20060606000128
Entity NameChestnut Hill Clinic Company Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1508936071
PECOS PAC ID: 2860492279
Enrollment ID: O20070109000509
Entity NamePottstown Clinic Company Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1649341934
PECOS PAC ID: 6406857184
Enrollment ID: O20070123000573

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. John K Derderian 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
John K Derderian, DO
555 N Duke St,
Lancaster, PA 17602-2250

Ph: () -		John K Derderian, DO
555 N Duke St,
Lancaster, PA 17602-2250

Ph: (717) 544-5511

Reviews and Comments


Internal Medicine Doctors in Lancaster, PA

Kaci Elizabeth Christian, M.D.
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Nancy L Adamopoulos, MD
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Mark H Johnston, MD
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John B Fileta, MD
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Dr. Paul David Allegretti, D.O.
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Phone: 717-544-3500    Fax: 717-544-3501
Elyse Goveia, M.D.
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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).

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