Dr. John K Derderian , DO
Internal Medicine • Lancaster, PA
Professional Overview & Biography Verified Profile Summary
Dr. John Derderian, DO is a certified Internal Medicine practicing in Lancaster, PA. With approximately 26 years of clinical experience since graduating from Philadelphia College Of Osteopathic Medicine in 2000, Dr. Derderian delivers high-quality medical care to the local community at 555 N DUKE ST.
Dr. Derderian is affiliated with Lancaster General Hospital and accepts Medicare assignment.
Frequently performed procedures and clinical services include subsequent hospital care with moderate levelof medical decision making, if using time, at least, initial hospital care with moderate level of medical decision making, if using time, at least, hospital discharge day management, more than. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.
Practice Location & Contact Primary Location
555 N Duke St
Lancaster, PA 176022250
Medicare Profile & Education
Philadelphia College Of Osteopathic Medicine
2000
✓ Accepts Assignment
In-Person Only
Specialty Benchmarks & Practice Insights
Comparative analytics for Internal Medicine in Lancaster, PA
Practicing in Lancaster, PA (7609 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Clinical Seniority & Experience Comparison
Performed Procedures & Service Volume
Top Medicare Part B procedures performed by this practitioner
| HCPCS Code & Description | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
|
99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
|
28 | 16 | $221.00 | $72.48 |
Medical Specialties & State Licenses
CMS Verified: 2025-11-01NUCC Taxonomy Code: 207R00000X
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.
Additional State Medicaid & Healthcare Payer Identifiers
Hospital & Practice Group Affiliations
Lancaster General Hospital
555 N Duke St, Lancaster, PA 176022250
Phone: 2678577751
Lancaster General Hospital
555 N Duke St, Lancaster, PA 176022250
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Family Medicine
Doctor of Medicine (M.D.)
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.)
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Nurse Anesthetist, Certified Registered
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Family Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Registered at 555 N DUKE ST, LANCASTER, PA 176022250 (Tel: 7175445511)
Registered at 555 N DUKE ST, LANCASTER, PA 176022250
NPI status registered as active in NPPES database
Registered at 6TH AVE AND SPRUCE STREET, WEST READING, PA 196111428 (Tel: 4846285455)
Registered at PO BOX 13579, READING, PA 196123579
Recorded as JOHN DERDERIAN, DO
Internal Medicine (License #OS011857 in PA)
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
Verified patient ratings, medical care experiences, and facility photos
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NPI Administrative Meta
Mailing Address
555 N Duke St
Lancaster, PA 176022250
This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.