Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John E. Lahaniatis, MD

Individual provider Radiation Oncology Physician · NPI 1326023102

John E. Lahaniatis, MD is a Radiation Oncology in Dover, Delaware. Graduated from Hahnemann University College of Medicine in 1995, 31 years ago. Practices with Bayhealth Medical Center, Inc, a 401-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Delaware.

Years since qualifying
31
Trained at
Hahnemann University College of Medicine
Licensed in
DE
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

640 S State St Fl 1
Dover, DE 19901-3530
Phone: (302) 674-4401
Fax: (302) 674-4129
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 100 Wellness Way, Milford, DE 19963-4364 — (302) 430-5303

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence C1-0005989 (DE)

Record details

NPI number1326023102
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 14, 2005
Last updated in NPPESAugust 2, 2022
Certification dateJuly 21, 2022
Mailing address640 S State Street, Mail Code 3055, Dover, DE 19901-3530

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyRADIATION ONCOLOGY
Medical schoolHAHNEMANN UNIVERSITY COLLEGE OF MEDICINE
Graduated 1995 (31 years in practice)
Group practice Bayhealth Medical Center, Inc — 401 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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