Clayton D. Humphrey, DO

Medicare activity in 2024

Official CMS public-use data for Clayton D. Humphrey, 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.

Most frequent services

1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)321 services
2. Hospital discharge day management, more than 30 minutes (99239)96 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)85 services
4. Prolonged hospital inpatient or observation care evaluation and management service(s) beyond the total time for the primary service (when the primary service has been selected using time on the date of the primary service); each additional 15 minutes by th (G0316)85 services
5. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)66 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%
• Chronic kidney disease57%
• Ischemic heart disease54%
• Arthritis53%
• Diabetes49%

Hospitals where Clayton D. Humphrey works

Medicare's Facility Affiliation Data lists Clayton D. Humphrey 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.

• University Health System, IncKnoxville, TN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 440015

Practice locations

Addresses where Clayton D. Humphrey is enrolled with Medicare (CMS data updated October 2, 2026).

• 1924 Alcoa HwyKnoxville, TN 37920 (865) 670‑6700

Group practices

Medicare enrollment lists Clayton D. Humphrey as a member of this group (CMS data updated October 2, 2026).

• University Health System, Inc.522 clinicians in the group

Specialties

• Internal Medicineprimary

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.

• Jason Kennedy
• Nathan C. Trentham, MD
• John M. Douglass, DO
• John Carroll, MD
• Chadwick S. Fitzgerald, DO
• David M. Rankin, MD
• Akram Dera, MD
• James W. Hurst, MD

All internal medicine doctors in Knoxville →

Other clinicians in University Health System, Inc.

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

• Krupa R. Patel, DO
• Gregory J. Mancini, MD
• Jessica Z. Maselli, PA
• Felix J. Chaltry, MD
• Carlos A. Rollhauser, MD
• Kristy L. Williams, NP

Clinician information

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