Gregory Duellman, D.O.
NPI 1417029455 · Diagnostic Radiology Physician · Charlotte, NC
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Duellman, D.O. is a Diagnostic Radiology Physician provider in Charlotte, NC (NPI 1417029455).
Provider details
- NPI number
- 1417029455
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 2007-00979 (NC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
3,443 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 1,327 | $8 |
| Ct Scan Head Or Brain Without Contrast70450 | 455 | $37 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 229 | $81 |
| Ct Scan of Upper Spine Without Contrast72125 | 168 | $44 |
| X-Ray of Abdomen, 1 View74018 | 122 | $8 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 101 | $78 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-14
- Last updated
- 2019-06-20
Frequently asked questions
- What is Gregory Duellman's NPI number?
- Gregory Duellman's National Provider Identifier (NPI) is 1417029455, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Duellman's specialty?
- Gregory Duellman is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Duellman located?
- Gregory Duellman's practice location on file with NPPES is 14121 Lissadell Cir, Charlotte, NC 28277-3137.
- What is Gregory Duellman's phone number?
- The practice phone number listed in the NPPES registry for Gregory Duellman is (704) 975-9730.
- Does Gregory Duellman accept Medicare?
- Gregory Duellman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Duellman's NPI active?
- Yes — Gregory Duellman's NPI (1417029455) is active in the NPPES registry as of the last update on 2019-06-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.