John K Derderian, DO

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

OS011857 Issued in PA

Practice address

555 N Duke St
Lancaster, PA 17602-2250

Phone

(717) 544-5511

NPI assigned

Jun 12, 2006

Last updated

Nov 1, 2025By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in PA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Internal Medicine

Education

Philadelphia College of Osteopathic Medicine, 2000

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Lancaster General HospitalGroup PAC ID 1254240039, 520 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Lancaster General Hospital Hospital, Lancaster, PA, CCN 390100

Merit-based Incentive Payment System (MIPS)

Final score

84.71 of 100Reported as group

Quality

73.34

Promoting interoperability

97

Improvement activities

40

Cost

78.18

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy, Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://api.platform.athenahealth.com/1606/brand/1/csg/101/fhir/r4
• Direct secure messaging: jderderian271200@direct-lghealth.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Lancaster General Hospital

  dba Penn Medicine Lancaster General Health Physicians Hospitalists

  • Hospitalist Physician
  • Lancaster, PA
  • NPI 1730323759

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• Chestnut Hill Clinic Company, LLC

  dba Behavioral Health Chestnut Hill Ave Tower Health Medical Group

  • Internal Medicine Physician
  • Philadelphia, PA
  • NPI 1508936071
  Medicare reassignment NPD
• Phoenixville Clinic Company LLC

  dba Cardiology Limerick Tower Health Medical Group

  • Family Medicine Physician
  • Phoenixville, PA
  • NPI 1891866182
  Medicare reassignment NPD
• Pottstown Clinic Company LLC

  dba Emergency Medicine Pottstown Tower Health Medical Group

  • Family Medicine Physician
  • Pottstown, PA
  • NPI 1649341934

  Internal Medicine

  Medicare reassignment NPD
• Reading Hospital

  dba Reading Hospital Radiation Oncology

  • Radiation Oncology Physician
  • West Reading, PA
  • NPI 1992387518
  Medicare reassignment NPD
• Tower Health Medical Group

  dba Internal Medicine - Tower Health Medical Group

  • Internal Medicine Physician
  • Birdsboro, PA
  • NPI 1609291350
  Medicare reassignment NPD
• Chestnut Hill Clinic Company, LLC

  dba Sports Medicine Chestnut Hill Manayunk THMG

  • Sports Medicine (Family Medicine) Physician
  • Philadelphia, PA
  • NPI 1811611692
  NPD
• Lancaster General Hospital

  dba Penn Medicine LG Health Physicians Gastrointestinal Services

  • Gastroenterology Physician
  • Lancaster, PA
  • NPI 1205691912
  NPD
• Phoenixville Clinic Company LLC

  dba Telemedicine Phoenixville Tower Health Medical Group

  • Neurology Physician
  • Phoenixville, PA
  • NPI 1275173957
  NPD
• Phoenixville Clinic Company LLC

  dba Phoenixville Surgical Associates

  • Vascular Surgery Physician
  • Limerick, PA
  • NPI 1790746345
  NPD
• Reading Hospital

  dba Reading Hospital Limerick Pharmacy

  • Community/Retail Pharmacy
  • Limerick, PA
  • NPI 1487468914
  NPD
• Reading Hospital

  dba Reading Hospital Occupational Health Services

  • Occupational Medicine Physician
  • West Reading, PA
  • NPI 1780742593
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Lancaster General Hospital

  • General Acute Care Hospital
  • Lancaster, PA
  • NPI 1104875103
  Care Compare affiliation
• Lancaster General Hospital

  dba Parkesburg Outpatient Center

  • General Acute Care Hospital
  • Parkesburg, PA
  • NPI 1245571942
  Care Compare affiliation
• Lancaster General Hospital

  • Ambulatory Surgical Clinic/Center
  • Lancaster, PA
  • NPI 1538290424

  Hospital

  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1150070400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1761955200000",
    "number": "1477595445",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "555 N DUKE ST",
            "city": "LANCASTER",
            "state": "PA",
            "postal_code": "176022250"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "555 N DUKE ST",
            "city": "LANCASTER",
            "state": "PA",
            "postal_code": "176022250",
            "telephone_number": "717-544-5511"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DERDERIAN",
        "first_name": "JOHN",
        "middle_name": "K",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-12",
        "last_updated": "2025-11-01",
        "certification_date": "2025-11-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "PA",
            "license": "OS011857",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Craig K Depoe, MD
• Mary Elizabeth Depoe, CRNP
• Ellen Michelle Depoy, MD
• Hannah Heisinger Deppen
• Kathryn M Deprimo, MD, MHA
• Dermasurgery Center, P.C.
• Dermatologist of Lancaster LLC
• Dermatology Associates of Lancaster, LTD
• Dermatology Physicians Inc
• Dermatology Physicians Inc

• Internal Medicine Physician in Lancaster, PA
• Providers in Lancaster, PA by specialty
• Internal Medicine Physician in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 1, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.