Dr. Gregory John Duellman, DO
- Medicare services, 2024
- 3,443
- Medicare patients, 2024
- 1,704
- MIPS score, 2024
- 96
- Hospital affiliations
- 1
- Medical group
- 1
- Practice address
- 2525 Court Drive, Gastonia, NC 28054
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Caromont Regional Medical Center - HOPD
Acute Care Hospital outpatient department · Gastonia, North Carolina
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Dr. Gregory John Duellman is a diagnostic radiologist in Gastonia, North Carolina
Dr. Duellman practices at Caromont Regional Medical Center - HOPD in Gastonia, North Carolina.
Dr. Duellman's NPI, 1417029455, was assigned on November 14, 2006. Dr. Duellman graduated from Des Moines University of Osteopathic Medicine and Health Sciences in 2002. Dr. Duellman holds Ohio license 34.008149.
- NPI
- 1417029455NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7315988631
- NPI enumeration date
- November 14, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory John Duellman practices at Caromont Regional Medical Center - HOPD in Gastonia, North Carolina
Dr. Duellman's primary practice is Caromont Regional Medical Center - HOPD, at 2525 Court Drive, Gastonia, NC 28054.
- Caromont Regional Medical Center - HOPD2525 Court Drive, Gastonia, NC 28054
Source: Dmand AI Affiliation Data
Dr. Gregory John Duellman is affiliated with 2 sites of care and 1 medical group
Dr. Duellman's primary practice is Caromont Regional Medical Center - HOPD in Gastonia, North Carolina. Dr. Duellman is also affiliated with CaroMont Regional Medical Center. The medical group on file is Gaston Radiology.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory John Duellman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Duellman practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Caromont Regional Medical Center - HOPD | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory John Duellman is one of 1,068 diagnostic radiologists in North Carolina
Diagnostic radiology is Dr. Duellman's primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dmand AI has Dr. Duellman's licenses on file in 2 states: Ohio and North Carolina.
Specialties and state licenses
- Diagnostic radiology, OhioPrimary
- North Carolina license
Diagnostic radiologists near Dr. Duellman
Counts of diagnostic radiologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory John Duellman billed Medicare for 3,443 services in 2024
CMS data shows 3,443 Medicare services from Dr. Duellman across 33 procedure codes in 2024, for 1,704 Medicare patients. Medicare paid $62,722 for them.
Dr. Duellman's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 3,8662024: 3,32514%
- Tests and treatments
- 2023: 1702024: 11831%
Where Dr. Duellman's Medicare services took place, 2024
- In an office221%
- In a facility3,42199%
Dr. Duellman compared with the North Carolina median for diagnostic radiologists, 2024
- Dr. Duellman
- North Carolina median
- Medicare services
- 3,443vs 2,32148% above
- Medicare patients
- 1,704vs 1,727Close to median
Medians across 1,000 diagnostic radiologists in North Carolina with Dmand AI profiles that report each measure.
Dr. Duellman's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Duellman and other diagnostic radiologists in North Carolina.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory John Duellman treated 1,704 Medicare patients in 2024, average age 75
CMS counts 1,704 Medicare patients who saw Dr. Duellman in 2024. The largest group is 75 to 84, with 617 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 2.01, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Duellman's median patient age at 70, with 58% women.
Dr. Duellman's Medicare patients by age, 2024
Dr. Duellman's Medicare patients by sex, 2024
- Women96857%
- Men73643%
Chronic conditions among Dr. Duellman's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis55%
- Chronic kidney disease46%
- Diabetes46%
- Anxiety45%
- Ischemic heart disease44%
- Mood disorders44%
Share of Medicare patients with each condition. A patient can have several.
Dr. Duellman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women58%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory John Duellman scored 96 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 96 out of 100 for Dr. Duellman for performance year 2024, reported as part of a group. Dr. Duellman accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Duellman's MIPS scores, performance year 2024
- 96of 100Final score
- 95.6of 100Quality
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Gregory John Duellman graduated from Des Moines University of Osteopathic Medicine and Health Sciences
Dr. Duellman graduated from Des Moines University of Osteopathic Medicine and Health Sciences in 2002.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory John Duellman's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory John Duellman
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What is Dr. Gregory John Duellman's NPI number?
Dr. Gregory John Duellman's NPI number is 1417029455. It was assigned on November 14, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory John Duellman?
Dr. Gregory John Duellman is a diagnostic radiologist in Gastonia, North Carolina. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).
Where does Dr. Gregory John Duellman practice?
Dr. Duellman practices at 2525 Court Drive, Gastonia, NC 28054. Dr. Duellman's primary practice is Caromont Regional Medical Center - HOPD in Gastonia, North Carolina.
What is Dr. Gregory John Duellman's medical license number?
Dr. Duellman holds Ohio license 34.008149, one of the licenses on file in 2 states.
Which states has Dr. Gregory John Duellman been licensed in?
Dmand AI has state licenses on file for Dr. Duellman in Ohio and North Carolina.
Which hospitals is Dr. Gregory John Duellman affiliated with?
Dr. Duellman is affiliated with CaroMont Regional Medical Center.
What medical group is Dr. Gregory John Duellman part of?
Dr. Duellman is linked to Gaston Radiology.
Does Dr. Gregory John Duellman accept Medicare?
Yes. CMS data shows Dr. Duellman billed Medicare for 3,443 services in 2024, and Dr. Duellman accepts Medicare assignment.
What is Dr. Gregory John Duellman's MIPS score?
Dr. Duellman's MIPS final score for performance year 2024 is 96 out of 100, reported as part of a group.
How many Medicare patients does Dr. Gregory John Duellman see?
CMS counts 1,704 Medicare patients who saw Dr. Duellman in 2024, with an average age of 75.
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What services does Dr. Gregory John Duellman bill to Medicare?
In 2024, Dr. Duellman's most billed Medicare services were diagnostic imaging (71045), diagnostic imaging (70450) and diagnostic imaging (74177).
Where did Dr. Gregory John Duellman go to medical school?
Dr. Duellman graduated from Des Moines University of Osteopathic Medicine and Health Sciences in 2002.
How long has Dr. Gregory John Duellman been practicing?
Dr. Duellman graduated from medical school in 2002, 24 years ago.
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