James F. Loomis, MD
Internal Medicine Physician · Washington, DC
James F. Loomis, MD is an internal medicine physician with a practice address in Washington, District of Columbia, and NPI 1528153160, issued on Oct 3, 2006. Check the license (District of Columbia MD043764, as entered in NPPES) on the District of Columbia Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- James F. Loomis
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- MD043764 DC
R8G21 MO
Self-reported in NPPES; status is on the state search - Practice location
- 5100 Wisconsin Ave NW, Washington, DC 20016
- Phone
- (202) 527-7500
- Enumerated
- Oct 3, 2006
- Record last updated
- Mar 31, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicaid ID
- 202463857 MO
- Medicare enrollment
- Enrolled (PECOS I20160503000044); accepts Medicare assignment
- Medical or professional school
- University Of Arkansas College Of Medicine, 1985
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 901 in District of Columbia → Look up another NPI →
Also registered at 5100 Wisconsin Ave NW
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James F. Loomis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersDistrict of Columbia Board of Medicine
Search for license MD043764Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 84% of the cost of the top drugs
509 Medicare Part D claims for 122 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Losartan Potassium70 claims
- Amlodipine Besylate49 claims
- Atorvastatin Calcium46 claims
- Arexvy35 claims
- Rosuvastatin Calcium25 claims
- Metformin Hcl Er23 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.
Bills Medicare through 2 group practices
- Pcrm ClinicWashington, DC
- Suburban/nrh Medical Rehabilitation IncBethesda, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James F. Loomis among 901 internal medicine physician records in District of Columbia
James F. Loomis, MD is one of 901 internal medicine physician records with a practice address in District of Columbia. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 67% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1985 · median 2008 among the 513 with a school on file
- Record last updated2016 · 61% 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 District of Columbia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
891 internal medicine physician records list a practice address in Washington
They are 891 of the 45,857 NPPES records with a practice address in Washington, and 901 internal medicine physician records in District of Columbia.
All 901 in District of Columbia → Every provider in Washington → Internal Medicine Physician nationwide →
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- Helene Freeman, M.D.Washington, DC 200161952310203
- Dawnielle Kilby-Robb, MDWashington, DC 200161265544613
- Michael Lee, MDWashington, DC 200161295734234
Common questions
What is James F. Loomis, MD's NPI number?
James F. Loomis, MD's National Provider Identifier (NPI) is 1528153160, issued on Oct 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James F. Loomis, MD located?
The NPPES record lists a practice address at 5100 Wisconsin Ave NW, Washington, DC, 20016. Phone: (202) 527-7500. Providers update this record themselves, so call before visiting.
How can I verify James F. Loomis, MD's license?
NPPES lists District of Columbia license number MD043764, as entered by the provider. Search the District of Columbia Board of Medicine at https://dchealth.dc.gov/bomed. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James F. Loomis, MD prescribe under Medicare Part D?
In 2024, James F. Loomis, MD had 509 Medicare Part D claims for 122 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.