JOHN K DERDERIAN DO
NPI 1477595445
Internal Medicine in Lancaster, PA

Active since June 12, 2006PECOS EnrolledAccepts Medicare Assignment
555 N DUKE ST, LANCASTER, PA 17602(717) 544-5511 Get Directions Write a Review

NPPES record last updated: November 1, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About John K Derderian Do NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN K DERDERIAN DO (NPI 1477595445) is an individual internal medicine provider in Lancaster, Pennsylvania, licensed in Pennsylvania (OS011857) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Lancaster General Hospital, and is a graduate of Philadelphia College Of Osteopathic Medicine (2000).

NPPES Registry Identity

NPI1477595445
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameJOHN K DERDERIANCredential: DO
Location Address555 N DUKE STLancaster, PA 17602-2250
Mailing Address555 N Duke StLancaster, PA 17602-2250
Sole ProprietorNo
Medical School CMSPhiladelphia College Of Osteopathic MedicineGraduated 2000
Enumeration DateJune 12, 2006
Last NPPES UpdateNovember 1, 2025
NPPES CertifiedNovember 1, 2025
NPI 1477595445 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License Licensed in PA · OS011857
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
555 N DUKE ST, Lancaster, PA 17602

Other Identifiers 1

Medicaid100820028PA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

John K Derderian Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7113917089
PECOS Enrollment IDI20040513000583
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Lancaster General Hospital

Acute Care Hospitals · Lancaster, PA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390100
Location555 North Duke StreetLancaster, PA 17602 · Lancaster County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 17602 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$126.34 typical visit price
range $54.64 – $166.87
Typical copayment $31.58 (range $13.66 – $41.71)
Most-billed visit code 99204
Established Patient
$96.82 typical visit price
range $17.33 – $135.84
Typical copayment $24.20 (range $4.33 – $33.96)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Family Medicine
555 N DUKE ST
LANCASTER, PA 17602
Dietitian, Registered
555 N DUKE ST
LANCASTER, PA 17602
Psychiatry & Neurology (Psychiatry)
555 N DUKE ST
LANCASTER, PA 17602
Nurse Anesthetist, Certified Registered
555 N DUKE ST
LANCASTER, PA 17602
Nurse Anesthetist, Certified Registered
555 N DUKE ST
LANCASTER, PA 17602
Internal Medicine
555 N DUKE ST
LANCASTER, PA 17602
Nurse Anesthetist, Certified Registered
555 N DUKE ST
LANCASTER, PA 17602
Nurse Anesthetist, Certified Registered
555 N DUKE ST
LANCASTER, PA 17602

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Derderian's NPI number?

The NPI number for John Derderian is 1477595445. It was assigned to this individual provider in the NPPES registry on June 12, 2006.

Where is John Derderian located?

John Derderian practices at 555 N Duke St, Lancaster, PA 17602. The listed phone number is (717) 544-5511.

What is John Derderian's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is John Derderian enrolled in Medicare?

Yes. John Derderian is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is John Derderian affiliated with any hospitals?

According to CMS data, John Derderian is affiliated with Lancaster General Hospital.

When was this NPI record last updated?

The NPPES record for John Derderian was last updated on November 1, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.