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Internal Medicine

Wesley L. Hayes, MD

Works at hospitals in Oak Ridge, TN · Harriman, TN · Tennessee

Summary

Dr. Wesley L. Hayes, MD is an internal medicine doctor at 1225 E Weisgarber Rd, Suite 200, Knoxville, TN 37849. Phone: (865) 938-3627. Accepts Medicare assignment. In 2024, Wesley L. Hayes had 297 Original Medicare patients and 5,256 services. NPI 1780603084. 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.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 1225 E Weisgarber Rd, Suite 200, Knoxville, TN 37849 · Directions (3 more locations)
  • Phone: (865) 938‑3627
  • Medicare: Accepts Medicare assignment
  • Hospitals: Methodist Medical Center of Oak Ridge, Roane Medical Center
  • Group practice: Summit Medical Group, PLLC
  • Medical school: University Of Tennessee, Hsc, College Of Medicine · graduated 2002 (24 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 Wesley L. Hayes, 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 Wesley L. Hayes accept Medicare assignment?
Yes. Medicare's clinician data says Wesley L. Hayes 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 Wesley L. Hayes see?
In 2024, CMS data shows 297 Original Medicare patients and 5,256 services for Wesley L. Hayes. This counts Original Medicare only and measures volume, not quality.
What is Wesley L. Hayes's NPI number?
1780603084. 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 Wesley L. Hayes, 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 patients297
Services billed to Medicare5,256
Different services or procedures125
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. Insertion of needle into vein for collection of blood sample (36415)530 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)522 services
  3. Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)448 services
  4. Blood test, comprehensive group of blood chemicals (80053)437 services
  5. Blood test, lipids (cholesterol and triglycerides) (80061)402 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%
  • Arthritis36%
  • Diabetes33%
  • Depression29%
  • Ischemic heart disease22%

Hospitals where Wesley L. Hayes works

Medicare's Facility Affiliation Data lists Wesley L. Hayes 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 Wesley L. Hayes is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Wesley L. Hayes as a member of this group (CMS data updated October 2, 2026).

  • Summit Medical Group, PLLC652 clinicians in the group

Specialties

Find other Internal Medicine doctors in Tennessee →

Other internal medicine doctors in Knoxville

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

All internal medicine doctors in Knoxville →

Other clinicians in Summit Medical Group, PLLC

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

Clinician information

CredentialMD
Medical schoolUniversity Of Tennessee, Hsc, College Of Medicine
Graduation year2002 (24 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1780603084
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