Nathaniel Calvin Warner, MD
Internal Medicine Physician · Richmond, VA
Nathaniel Calvin Warner, MD is an internal medicine physician with a practice address in Richmond, Virginia, and NPI 1174969794, issued on May 22, 2013. Check the license (Virginia 0101260708, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Nathaniel Calvin Warner
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 0101260708 VA
Self-reported in NPPES; status is on the state search - Practice location
- 1250 E Marshall St, Richmond, VA 23298
- Phone
- (804) 828-0951
- Enumerated
- May 22, 2013
- Record last updated
- Jun 30, 2026
- Medicare enrollment
- Enrolled (PECOS I20161108000597); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,599 in Virginia → Look up another NPI →
Also registered at 1250 E Marshall St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Nathaniel Calvin Warner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101260708Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average internal medicine physician in 2024
609 Medicare Part D claims for 99 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 35% of claims.
Most prescribed
- Biktarvy63 claims
- Azithromycin50 claims
- Ethambutol Hcl31 claims
- Voriconazole27 claims
- Imipenem-Cilastatin Sodium25 claims
- Cephalexin20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 76.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $125.52
3 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mcv Associated PhysiciansRichmond, VA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathaniel Calvin Warner among 3,599 internal medicine physician records in Virginia
Nathaniel Calvin Warner, MD is one of 3,599 internal medicine physician records with a practice address in Virginia. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 70% of them.
- NPI issued2013 · 70% of these records are older, 28% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2013 · median 2003 among the 2,234 with a school on file
- Record last updated2026 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Virginia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
547 internal medicine physician records list a practice address in Richmond
They are 547 of the 14,083 NPPES records with a practice address in Richmond, and 3,599 internal medicine physician records in Virginia.
All 3,599 in Virginia → Every provider in Richmond → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Brian Aboff, MDRichmond, VA 232981225013543
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- Lisa Ellis, M.D.Richmond, VA 232981972508950
- Alton Hart, M.D.Richmond, VA 232981073532321
- Tahir Khan, M.D.Richmond, VA 232981942250378
- Thokozeni Lipato, MDRichmond, VA 232981770570657
- Heather Masters, M.D.Richmond, VA 232981215967286
Common questions
What is Nathaniel Calvin Warner, MD's NPI number?
Nathaniel Calvin Warner, MD's National Provider Identifier (NPI) is 1174969794, issued on May 22, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Nathaniel Calvin Warner, MD located?
The NPPES record lists a practice address at 1250 E Marshall St, Richmond, VA, 23298. Phone: (804) 828-0951. Providers update this record themselves, so call before visiting.
How can I verify Nathaniel Calvin Warner, MD's license?
NPPES lists Virginia license number 0101260708, as entered by the provider. Search the Virginia Department of Health Professions at https://dhp.virginiainteractive.org/lookup/index. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nathaniel Calvin Warner, MD prescribe under Medicare Part D?
In 2024, Nathaniel Calvin Warner, MD had 609 Medicare Part D claims for 99 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Nathaniel Calvin Warner, MD's MIPS final score?
The 2023 MIPS final score is 76.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.