Dr. Gregory P. Warren, MD
- Medicare services, 2023
- 410
- Part D claims, 2024
- 54
- MIPS score, 2024
- 81
- Industry payments
- $3,927
- Affiliated sites
- 1
- Practice address
- 1144 N Road St, Elizabeth City, NC 27909
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sentara Albemarle Cancer Care Center - HOPD
Acute Care Hospital outpatient department · Elizabeth City, North Carolina
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Dr. Gregory P. Warren is a hematologist and oncologist in Elizabeth City, North Carolina
Dr. Warren practices at Sentara Albemarle Cancer Care Center - HOPD in Elizabeth City, North Carolina.
Dr. Warren's NPI, 1154309243, was assigned on January 9, 2006. Dr. Warren graduated from University of Toledo College of Medicine in 1989. Dr. Warren holds Ohio license 35-06-8930W.
- NPI
- 1154309243NPI Registry (opens in a new tab)
- NPI enumeration date
- January 9, 2006
- NPI status
- Active
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Gregory P. Warren practices at Sentara Albemarle Cancer Care Center - HOPD in Elizabeth City, North Carolina
Dr. Warren's primary practice is Sentara Albemarle Cancer Care Center - HOPD, at 1144 N Road St, Elizabeth City, NC 27909.
- Sentara Albemarle Cancer Care Center - HOPD1144 N Road St, Elizabeth City, NC 27909
Source: Dmand AI Affiliation Data
Dr. Gregory P. Warren is affiliated with 1 site of care
Dr. Warren's primary practice is Sentara Albemarle Cancer Care Center - HOPD in Elizabeth City, North Carolina.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory P. Warren's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Warren practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sentara Albemarle Cancer Care Center - HOPD | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory P. Warren is one of 420 hematologists and oncologists in North Carolina
Hematology and oncology is Dr. Warren's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Warren is licensed in Ohio.
Specialties and state licenses
- Hematology and oncology, OhioPrimary
Hematologists and oncologists near Dr. Warren
Counts of hematologists and oncologists 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 P. Warren billed Medicare for 410 services in 2023
CMS data shows 410 Medicare services from Dr. Warren across 5 procedure codes in 2023. Medicare paid $24,287 for them.
Dr. Warren's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 1,1312023: 41064%
Where Dr. Warren's Medicare services took place, 2023
- In an office348%
- In a facility37692%
Dr. Warren compared with the North Carolina median for hematologists and oncologists, 2023
- Dr. Warren
- North Carolina median
- Medicare services
- 410vs 4509% below
- Part D claims
- 14vs 32496% below
Medians across 402 hematologists and oncologists in North Carolina with Dmand AI profiles that report each measure.
Dr. Warren's most billed Medicare procedure codes, 2023
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. Warren and other hematologists and oncologists in North Carolina.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory P. Warren's patients have a median age of 72
Across all payers, Dmand AI patient panel data puts Dr. Warren's median patient age at 72, with 47% women.
Dr. Warren's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women47%
- Men47%
Source: Dmand AI Patient Panel Data
Dr. Gregory P. Warren wrote 54 Medicare Part D claims in 2024
In 2024, Dr. Warren wrote 54 Medicare Part D claims for 18 patients. 69% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $241 in total drug cost. In 2023, CMS named 612 claims across 26 drugs.
Dr. Warren's Part D claims by kind of drug, 2024
- Generic37 claims69%
- Brand-name17 claims31%
Dr. Warren'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 6122024: 1498%
Drugs named by CMS: 1 in 2024, 26 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
Dr. Gregory P. Warren scored 81 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 81 out of 100 for Dr. Warren for performance year 2024, reported as part of a group.
Dr. Warren's MIPS scores, performance year 2024
- 81of 100Final score
- 63.6of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 73of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Gregory P. Warren received $3,927 in industry payments from 2016 to 2023
CMS Open Payments shows 250 general payments to Dr. Warren from 39 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 96% of the total. Novartis Pharmaceuticals Corporation paid the most, $695.
General payments to Dr. Warren by program year, 2016 to 2023
General payments to Dr. Warren by kind, 2016 to 2023
- Food and beverage$3,77996%
- Education$1474%
Companies that paid Dr. Warren the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory P. Warren graduated from University of Toledo College of Medicine
Dr. Warren graduated from University of Toledo College of Medicine in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory P. Warren'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 Data |
| 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 | Clinician Public Reporting: Overall MIPS Performance (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 P. Warren
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What is Dr. Gregory P. Warren's NPI number?
Dr. Gregory P. Warren's NPI number is 1154309243. It was assigned on January 9, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory P. Warren?
Dr. Gregory P. Warren is a hematologist and oncologist in Elizabeth City, North Carolina. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Gregory P. Warren practice?
Dr. Warren practices at 1144 N Road St, Elizabeth City, NC 27909. Dr. Warren's primary practice is Sentara Albemarle Cancer Care Center - HOPD in Elizabeth City, North Carolina.
What is Dr. Gregory P. Warren's medical license number?
Dr. Warren holds Ohio license 35-06-8930W.
Does Dr. Gregory P. Warren accept Medicare?
Yes. CMS data shows Dr. Warren billed Medicare for 410 services in 2023.
What is Dr. Gregory P. Warren's MIPS score?
Dr. Warren's MIPS final score for performance year 2024 is 81 out of 100, reported as part of a group.
What services does Dr. Gregory P. Warren bill to Medicare?
In 2023, Dr. Warren's most billed Medicare services were office visit, established patient (99214), hospital inpatient care (99232) and office visit, established patient (99213).
Where did Dr. Gregory P. Warren go to medical school?
Dr. Warren graduated from University of Toledo College of Medicine in 1989.
What drugs does Dr. Gregory P. Warren prescribe most?
In 2024 Medicare Part D data, Dr. Warren's most prescribed drugs by claims were Letrozole.
Has Dr. Gregory P. Warren received payments from drug or device companies?
CMS Open Payments shows $3,927 in general payments to Dr. Warren from 39 companies from 2016 to 2023. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. Gregory P. Warren been practicing?
Dr. Warren graduated from medical school in 1989, 37 years ago.
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