Quick answers
- Does William H. Messerschmidt accept Medicare assignment?
- Yes. Medicare's clinician data says William H. Messerschmidt 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 William H. Messerschmidt see?
- In 2024, CMS data shows 62 Original Medicare patients and 105 services for William H. Messerschmidt. This counts Original Medicare only and measures volume, not quality.
- What is William H. Messerschmidt's NPI number?
- 1134115777. 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 William H. Messerschmidt, 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 patients | 62 |
|---|---|
| Services billed to Medicare | 105 |
| Different services or procedures | 6 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Injection of chemical agent into single incompetent vein of leg using ultrasound guidance (36465)47 services
- Destruction of first incompetent vein of arm or leg using radiofrequency and imaging guidance (36475)31 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)22 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 cholesterol74%
- Arthritis56%
- Ischemic heart disease39%
- Diabetes35%
- Chronic kidney disease26%
Hospitals where William H. Messerschmidt works
Medicare's Facility Affiliation Data lists William H. Messerschmidt 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.
- Wellmont Bristol Regional Medical CenterBristol, TN · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 440012
Practice locations
Addresses where William H. Messerschmidt is enrolled with Medicare (CMS data updated October 2, 2026).
- 2800 Peoples St, Suite 80Johnson City, TN 37604 (423) 631‑0101
Group practices
Medicare enrollment lists William H. Messerschmidt as a member of this group (CMS data updated October 2, 2026).
- Living Water Vein Institute, PC3 clinicians in the group
Specialties
- Thoracic Surgeryprimary
Other thoracic surgeons in Tennessee
Clinicians with the same Medicare primary specialty in Tennessee — not a recommendation.
Other clinicians in Living Water Vein Institute, PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Jefferson Medical College Of Thomas Jefferson University |
| Graduation year | 1979 (47 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134115777 |
| Corrections | Report 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians