Dr. Gregory K. Sun, DO
- Medicare services, 2024
- 713
- Medicare patients, 2024
- 569
- Part D claims, 2024
- 145
- Hospital affiliations
- 2
- Industry payments
- $79
- Practice address
- 175 High St, Newton, NJ 07860
- Practice phone
- Call (973) 383-2121
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Sun's professional email, personal email and mobile number
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Dr. Gregory K. Sun is an emergency medicine physician in Newton, New Jersey
Dr. Sun practices at Newton Medical Center in Newton, New Jersey, part of Atlantic Health System.
Dr. Sun's NPI, 1821529751, was assigned on March 22, 2017. Dr. Sun graduated from Rowan University School of Osteopathic Medicine in 2017. Dr. Sun holds New York license 302373.
- NPI
- 1821529751NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5092146043
- NPI enumeration date
- March 22, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (973) 383-2121
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory K. Sun practices at Newton Medical Center in Newton, New Jersey
Dr. Sun's primary practice is Newton Medical Center, at 175 High St, Newton, NJ 07860 in Sussex County. The practice phone is (973) 383-2121.
- Newton Medical Center175 High St, Newton, NJ 07860 · Sussex CountyPhone(973) 383-2121
Source: Dmand AI Affiliation Data
Dr. Gregory K. Sun is affiliated with 2 sites of care and 4 medical groups
Dr. Sun's primary practice is Newton Medical Center in Newton, New Jersey, part of Atlantic Health System. Dr. Sun is also affiliated with Upstate University Hospital. The medical group on file is Morristown Emergency Medical Associates. Dmand AI also links Dr. Sun to 3 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory K. Sun's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sun practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Newton Medical Center | Available with a free account |
| +1 more site and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory K. Sun is one of 1,548 emergency medicine physicians in New Jersey
Emergency medicine is Dr. Sun's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Sun is licensed in New York.
Specialties and state licenses
- Emergency medicine, New YorkPrimary
Emergency medicine physicians near Dr. Sun
Counts of emergency medicine physicians 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 K. Sun billed Medicare for 713 services in 2024
CMS data shows 713 Medicare services from Dr. Sun across 6 procedure codes in 2024, for 569 Medicare patients. Medicare paid $83,930 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Sun's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3722024: 60262%
- Tests and treatments
- 2023: 1062024: 1115%
Dr. Sun compared with the New Jersey median for emergency medicine physicians, 2024
- Dr. Sun
- New Jersey median
- Medicare services
- 713vs 3262.2 times
- Medicare patients
- 569vs 32177% above
- Part D claims
- 69vs 4747% above
Medians across 1,494 emergency medicine physicians in New Jersey with Dmand AI profiles that report each measure.
Dr. Sun'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory K. Sun treated 569 Medicare patients in 2024, average age 75
CMS counts 569 Medicare patients who saw Dr. Sun in 2024. The largest group is 75 to 84, with 212 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 1.90, 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. Sun's median patient age at 46, with 53% women.
Dr. Sun's Medicare patients by age, 2024
Dr. Sun's Medicare patients by sex, 2024
- Women31756%
- Men25244%
Chronic conditions among Dr. Sun's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease52%
- Arthritis50%
- Anxiety44%
- Mood disorders43%
- Chronic kidney disease39%
- Heart failure38%
Share of Medicare patients with each condition. A patient can have several.
Dr. Sun's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 46
Patient panel by sex, all payers
- Women53%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory K. Sun wrote 145 Medicare Part D claims in 2024
In 2024, Dr. Sun wrote 145 Medicare Part D claims for 123 patients. 92% of them were for generic drugs. CMS names the drug for 69 of them, across 4 drugs with 11 or more claims each, at $296 in total drug cost. In 2023, CMS named 39 claims across 3 drugs.
Dr. Sun's Part D claims by kind of drug, 2024
- Generic133 claims92%
- Brand-name12 claims8%
Dr. Sun's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Sun's Part D claims, 2024
- Opioids8%11 of 145 claims
- Antibiotics42%61 of 145 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 392024: 6977%
Drugs named by CMS: 4 in 2024, 3 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Gregory K. Sun takes part in Medicare
Dr. Sun accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Gregory K. Sun received $79 in industry payments from 2022 to 2025
CMS Open Payments shows 2 general payments to Dr. Sun from 2 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 100% of the total. Biocomposites Inc paid the most, $70.
General payments to Dr. Sun by program year, 2022 to 2025
Companies that paid Dr. Sun the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory K. Sun graduated from Rowan University School of Osteopathic Medicine
Dr. Sun graduated from Rowan University School of Osteopathic Medicine in 2017.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory K. Sun'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 DataDmand AI Org Hierarchy 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) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - 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) |
| Industry payments | Open Payments (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 K. Sun
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregory K. Sun's NPI number?
Dr. Gregory K. Sun's NPI number is 1821529751. It was assigned on March 22, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory K. Sun?
Dr. Gregory K. Sun is an emergency medicine physician in Newton, New Jersey. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Gregory K. Sun practice?
Dr. Sun practices at 175 High St, Newton, NJ 07860. Dr. Sun's primary practice is Newton Medical Center in Newton, New Jersey, part of Atlantic Health System. Dmand AI also links Dr. Sun to 3 medical groups.
What is Dr. Gregory K. Sun's office phone number?
The practice phone on file for Dr. Sun is (973) 383-2121.
What is Dr. Gregory K. Sun's medical license number?
Dr. Sun holds New York license 302373.
Which hospitals is Dr. Gregory K. Sun affiliated with?
Dr. Sun practices at Newton Medical Center in Newton, New Jersey. Dr. Sun is also affiliated with Upstate University Hospital.
What medical group is Dr. Gregory K. Sun part of?
Dr. Sun is linked to Morristown Emergency Medical Associates. Dmand AI links Dr. Sun to 3 more medical groups.
Does Dr. Gregory K. Sun accept Medicare?
Yes. CMS data shows Dr. Sun billed Medicare for 713 services in 2024, and Dr. Sun accepts Medicare assignment.
How many Medicare patients does Dr. Gregory K. Sun see?
CMS counts 569 Medicare patients who saw Dr. Sun in 2024, with an average age of 75.
What services does Dr. Gregory K. Sun bill to Medicare?
In 2024, Dr. Sun's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and heart test or procedure (93042).
Show 4 more questionsShow fewer questions
Where did Dr. Gregory K. Sun go to medical school?
Dr. Sun graduated from Rowan University School of Osteopathic Medicine in 2017.
What drugs does Dr. Gregory K. Sun prescribe most?
In 2024 Medicare Part D data, Dr. Sun's most prescribed drugs by claims were Cephalexin, Ondansetron ODT and Prednisone.
Has Dr. Gregory K. Sun received payments from drug or device companies?
CMS Open Payments shows $79 in general payments to Dr. Sun from 2 companies from 2022 to 2025. The largest total came from Biocomposites Inc.
How long has Dr. Gregory K. Sun been practicing?
Dr. Sun graduated from medical school in 2017, 9 years ago.
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