Dr. Greg A. Warren, DO
- Medicare services, 2024
- 1,819
- Medicare patients, 2024
- 736
- Part D claims, 2024
- 5,445
- Hospital affiliations
- 5
- Industry payments
- $5,092
- Practice address
- 511 Paladin Dr, Greenville, NC 27834
- Practice phone
- Call (252) 332-3896
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ahoskie Dialysis
Greenville, North Carolina
Find Dr. Warren's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Greg A. Warren is a nephrologist in Greenville, North Carolina
Dr. Warren practices at Ahoskie Dialysis in Greenville, North Carolina.
Dr. Warren's NPI, 1245270131, was assigned on June 8, 2006. Dr. Warren graduated from Rowan University School of Osteopathic Medicine in 2001.
- NPI
- 1245270131NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4688670649
- NPI enumeration date
- June 8, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (252) 332-3896
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Greg A. Warren practices at Ahoskie Dialysis in Greenville, North Carolina
Dr. Warren's primary practice is Ahoskie Dialysis, at 511 Paladin Dr, Greenville, NC 27834 in Pitt County. The practice phone is (252) 332-3896.
- Ahoskie Dialysis511 Paladin Dr, Greenville, NC 27834 · Pitt CountyPhone(252) 332-3896
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Greg A. Warren is affiliated with 16 sites of care and 3 medical groups
Dr. Warren's primary practice is Ahoskie Dialysis in Greenville, North Carolina. Dr. Warren is also affiliated with Sentara Norfolk General Hospital. The medical group on file is Broad River Rehab. Dmand AI also links Dr. Warren to 4 more hospitals, 5 dialysis centers, 3 home health agencies, 2 group practices and clinics and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Greg A. Warren's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Warren practices, 15 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ahoskie Dialysis | Available with a free account |
| +15 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Greg A. Warren is one of 348 nephrologists in North Carolina
Nephrology is Dr. Warren's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Warren has a license on file in North Carolina.
Specialties and state licenses
- Nephrology, North Carolina
Nephrologists near Dr. Warren
Counts of nephrologists 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. Greg A. Warren billed Medicare for 1,819 services in 2024
CMS data shows 1,819 Medicare services from Dr. Warren across 13 procedure codes in 2024, for 736 Medicare patients. Medicare paid $147,229 for them.
Dr. Warren's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,1552024: 93519%
- Tests and treatments
- 2023: 5042024: 80259%
- Other services
- 2023: 442024: 425%
- Lab and pathology
- 2023: 1072024: 4063%
Where Dr. Warren's Medicare services took place, 2024
- In an office94852%
- In a facility87148%
Dr. Warren compared with the North Carolina median for nephrologists, 2024
- Dr. Warren
- North Carolina median
- Medicare services
- 1,819vs 1,04674% above
- Medicare patients
- 736vs 2972.5 times
- Part D claims
- 4,930vs 7326.7 times
Medians across 346 nephrologists in North Carolina with Dmand AI profiles that report each measure.
Dr. Warren'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.
Need commercial claims for Dr. Warren?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Warren and other nephrologists in North Carolina.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Greg A. Warren treated 736 Medicare patients in 2024, average age 74
CMS counts 736 Medicare patients who saw Dr. Warren in 2024. The largest group is 75 to 84, with 264 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 24% are also on Medicaid. Their average risk score is 3.14, 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. Warren's median patient age at 67, with 52% women.
Dr. Warren's Medicare patients by age, 2024
Dr. Warren's Medicare patients by sex, 2024
- Women35949%
- Men37751%
Chronic conditions among Dr. Warren's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease68%
- Diabetes56%
- Arthritis49%
- Ischemic heart disease46%
- Heart failure45%
- Atrial fibrillation38%
Share of Medicare patients with each condition. A patient can have several.
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 67
Patient panel by sex, all payers
- Women52%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Greg A. Warren wrote 5,445 Medicare Part D claims in 2024
In 2024, Dr. Warren wrote 5,445 Medicare Part D claims for 457 patients. 85% of them were for generic drugs. CMS names the drug for 4,930 of them, across 103 drugs with 11 or more claims each, at $578,933 in total drug cost. In 2023, CMS named 4,805 claims across 101 drugs.
Dr. Warren's Part D claims by kind of drug, 2024
- Generic4,621 claims85%
- Brand-name768 claims14%
- Other56 claims1%
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.
Drug classes CMS tracks in Dr. Warren's Part D claims, 2024
- Opioids2%109 of 5,445 claims
- Antibiotics2%114 of 5,445 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: 4,8052024: 4,9303%
Drugs named by CMS: 103 in 2024, 101 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. Greg A. Warren offers telehealth to Medicare patients
Dr. Warren accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Warren as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Greg A. Warren received $5,092 in industry payments from 2016 to 2025
CMS Open Payments shows 259 general payments to Dr. Warren from 36 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 93% of the total. Mallinckrodt LLC paid the most, $776.
General payments to Dr. Warren by program year, 2016 to 2025
General payments to Dr. Warren by kind, 2016 to 2025
- Food and beverage$4,72593%
- Education$3677%
Companies that paid Dr. Warren the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Greg A. Warren graduated from Rowan University School of Osteopathic Medicine
Dr. Warren graduated from Rowan University School of Osteopathic Medicine in 2001.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Greg A. 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| 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. Greg A. Warren
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. Greg A. Warren's NPI number?
Dr. Greg A. Warren's NPI number is 1245270131. It was assigned on June 8, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Greg A. Warren?
Dr. Greg A. Warren is a nephrologist in Greenville, North Carolina. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Greg A. Warren practice?
Dr. Warren practices at 511 Paladin Dr, Greenville, NC 27834. Dr. Warren's primary practice is Ahoskie Dialysis in Greenville, North Carolina. Dmand AI also links Dr. Warren to 4 hospitals, 5 dialysis centers, 3 home health agencies, 2 group practices and clinics and 2 medical groups.
What is Dr. Greg A. Warren's office phone number?
The practice phone on file for Dr. Warren is (252) 332-3896.
Which hospitals is Dr. Greg A. Warren affiliated with?
Dr. Warren is affiliated with Sentara Norfolk General Hospital. Dmand AI links Dr. Warren to 4 more hospitals.
What medical group is Dr. Greg A. Warren part of?
Dr. Warren is linked to Broad River Rehab. Dmand AI links Dr. Warren to 2 more medical groups.
Does Dr. Greg A. Warren accept Medicare?
Yes. CMS data shows Dr. Warren billed Medicare for 1,819 services in 2024, and Dr. Warren accepts Medicare assignment.
Does Dr. Greg A. Warren offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Warren as offering telehealth services.
How many Medicare patients does Dr. Greg A. Warren see?
CMS counts 736 Medicare patients who saw Dr. Warren in 2024, with an average age of 74.
What services does Dr. Greg A. Warren bill to Medicare?
In 2024, Dr. Warren's most billed Medicare services were heart test or procedure (93010), office visit, established patient (99214) and hospital inpatient care (99232).
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Where did Dr. Greg A. Warren go to medical school?
Dr. Warren graduated from Rowan University School of Osteopathic Medicine in 2001.
What drugs does Dr. Greg A. Warren prescribe most?
In 2024 Medicare Part D data, Dr. Warren's most prescribed drugs by claims were Amlodipine Besylate, Lisinopril and Atorvastatin Calcium.
Has Dr. Greg A. Warren received payments from drug or device companies?
CMS Open Payments shows $5,092 in general payments to Dr. Warren from 36 companies from 2016 to 2025. The largest total came from Mallinckrodt LLC.
How long has Dr. Greg A. Warren been practicing?
Dr. Warren graduated from medical school in 2001, 25 years ago.
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