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Hematology/Oncology

Leonard J. Harris Jr., MD

Works at hospitals in Corinth, MS · Memphis, TN · Bartlett, TN · Mississippi, Tennessee

Summary

Dr. Leonard J. Harris Jr., MD is a hematologist-oncologist at 1588 Union Ave, Memphis, TN 38104. Phone: (901) 300-1562. Accepts Medicare assignment. In 2024, Leonard J. Harris Jr. had 573 Original Medicare patients and 92,512 services. NPI 1518014307. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Leonard J. Harris 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 Leonard J. Harris Jr. accept Medicare assignment?
Yes. Medicare's clinician data says Leonard J. Harris 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 Leonard J. Harris Jr. see?
In 2024, CMS data shows 573 Original Medicare patients and 92,512 services for Leonard J. Harris Jr.. This counts Original Medicare only and measures volume, not quality.
What is Leonard J. Harris Jr.'s NPI number?
1518014307. 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 Leonard J. Harris 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 patients573
Services billed to Medicare92,512
Different services or procedures184
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Injection, ferric carboxymaltose, 1 mg (J1439)12,750 services
  2. Injection, pembrolizumab, 1 mg (J9271)9,200 services
  3. Injection, darbepoetin alfa, 1 microgram (non-esrd use) (J0881)6,280 services
  4. Injection, denosumab, 1 mg (J0897)2,340 services
  5. Injection, ferric derisomaltose, 10 mg (J1437)1,800 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 blood pressure75%
  • High cholesterol75%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)48%
  • Arthritis47%
  • Chronic kidney disease41%
  • Ischemic heart disease38%

Hospitals where Leonard J. Harris Jr. works

Medicare's Facility Affiliation Data lists Leonard J. Harris Jr. at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Leonard J. Harris Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Leonard J. Harris Jr. as a member of these groups (CMS data updated October 2, 2026).

  • The West Clinic P.C.118 clinicians in the group
  • Shelby County Health Care Corporation40 clinicians in the group

Specialties

Find other Hematology/Oncology doctors in Tennessee →

Other hematologist-oncologists in Memphis

Clinicians with the same Medicare primary specialty in Memphis, TN — not a recommendation.

All hematologist-oncologists in Memphis →

Other clinicians in The West Clinic P.C.

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

Clinician information

CredentialMD
Medical schoolMedical College Of Georgia School Of Medicine
Graduation year2005 (21 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1518014307
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. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians