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Internal Medicine

James F. Loomis Jr., MD

Sees patients in Washington, DC · Bethesda, MD · District of Columbia, Maryland

Summary

Dr. James F. Loomis Jr., MD is an internal medicine doctor at 5100 Wisconsin Ave NW, Suite 401, Washington, DC 20016. Phone: (202) 527-7500. Accepts Medicare assignment. In 2024, James F. Loomis Jr. had 133 Original Medicare patients and 379 services. NPI 1528153160. Source: CMS National Downloadable File, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 5100 Wisconsin Ave NW, Suite 401, Washington, DC 20016 · Directions (2 more locations)
  • Phone: (202) 527‑7500
  • Medicare: Accepts Medicare assignment
  • Group practice: Suburban/Nrh Medical Rehabilitation Inc (+1 more)
  • Medical school: University Of Arkansas College Of Medicine · graduated 1985 (41 years since medical school)
  • Gender (as listed): Male
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about James F. Loomis Jr., joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does James F. Loomis Jr. accept Medicare assignment?
Yes. Medicare's clinician data says James F. Loomis Jr. accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does James F. Loomis Jr. see?
In 2024, CMS data shows 133 Original Medicare patients and 379 services for James F. Loomis Jr.. This counts Original Medicare only and measures volume, not quality.
What is James F. Loomis Jr.'s NPI number?
1528153160. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for James F. Loomis Jr., data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients133
Services billed to Medicare379
Different services or procedures20
Participating Medicare providerYes
Average age of these patients72

Most frequent services

  1. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)85 services
  2. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)62 services
  3. Annual depression screening, 5 to 15 minutes (G0444)57 services
  4. Annual alcohol misuse screening, 5 to 15 minutes (G0442)54 services
  5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)49 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol75%
  • High blood pressure58%
  • Arthritis30%
  • Ischemic heart disease26%
  • Diabetes21%
  • Osteoporosis16%

Practice locations

Addresses where James F. Loomis Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists James F. Loomis Jr. as a member of these groups (CMS data updated October 2, 2026).

  • Suburban/Nrh Medical Rehabilitation Inc941 clinicians in the group
  • PCRM Clinic4 clinicians in the group

Specialties

Find other Internal Medicine doctors in District of Columbia →

Other internal medicine doctors in Washington

Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.

All internal medicine doctors in Washington →

Other clinicians in Suburban/Nrh Medical Rehabilitation Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolUniversity Of Arkansas College Of Medicine
Graduation year1985 (41 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1528153160
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  2. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians