Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Gregory John Duellman, DO

Individual provider Diagnostic Radiology Physician · NPI 1417029455

Dr. Gregory John Duellman, DO practises Diagnostic Radiology in Charlotte, North Carolina. Graduated from Des Moines University of Osteopathic Medicine and Health Sciences in 2002, 24 years ago. Practices with Gaston Radiology PA, a 29-clinician group and accepts Medicare assignment. Licensed in North Carolina and Ohio.

Years since qualifying
24
Trained at
Des Moines University of Osteopathic Medicine and Health Sciences
Licensed in
NC, OH
In the registry since
2006
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

14121 Lissadell Cir
Charlotte, NC 28277-3137
Phone: (704) 975-9730
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 34.008149 (OH)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 2007-00979 (NC)

Record details

NPI number1417029455
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedNovember 14, 2006
Last updated in NPPESJune 20, 2019

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolDES MOINES UNIVERSITY OF OSTEOPATHIC MEDICINE AND HEALTH SCIENCES
Graduated 2002 (24 years in practice)
Group practice Gaston Radiology Pa — 29 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients1,704
Services billed 3,656 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Caromont Regional Medical Center Hospital · Gastonia, NC

Colleagues at Gaston Radiology PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 29 clinicians in the practice; 12 are shown here.

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