Quick answers
- Does John L. Tamminen Iii accept Medicare assignment?
- Yes. Medicare's clinician data says John L. Tamminen Iii 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 John L. Tamminen Iii see?
- In 2024, CMS data shows 1,384 Original Medicare patients and 1,773 services for John L. Tamminen Iii. This counts Original Medicare only and measures volume, not quality.
- What is John L. Tamminen Iii's NPI number?
- 1740250927. 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 John L. Tamminen Iii, 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 | 1,384 |
|---|---|
| Services billed to Medicare | 1,773 |
| Different services or procedures | 132 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- X-ray of chest, 1 view (71045)298 services
- Ct scan head or brain without contrast (70450)119 services
- Ct scan of abdomen and pelvis with contrast (74177)76 services
- X-ray of chest, 2 views (71046)63 services
- X-ray of abdomen, 1 view (74018)58 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%
- Arthritis59%
- Chronic kidney disease39%
- Diabetes38%
- Anxiety38%
Hospitals where John L. Tamminen Iii works
Medicare's Facility Affiliation Data lists John L. Tamminen Iii 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.
- Carilion Franklin Memorial HospitalRocky Mount, VA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 490089
- Carilion Giles Community HospitalPearisburg, VA · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 491302
- Carilion Medical CenterRoanoke, VA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 490024
- Carilion New River Valley Medical CenterChristiansburg, VA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 490042
- Carilion Tazewell Community HospitalTazewell, VA · Acute Care Hospital · Emergency services: listed by Medicare · CCN 490117
Practice locations
Addresses where John L. Tamminen Iii is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 18; the Medicare profile lists all.
- 1 Health CirLexington, VA 24450 (540) 462‑1200
- 150 Market Ridge LnDaleville, VA 24083 (540) 966‑0460
- 159 Hartley WayPearisburg, VA 24134 (540) 921‑6000
- 180 Floyd AveRocky Mount, VA 24151 (540) 483‑5277
- 1906 Belleview Ave SERoanoke, VA 24014 (540) 981‑7000
Group practices
Medicare enrollment lists John L. Tamminen Iii as a member of these groups (CMS data updated October 2, 2026).
- Carilion Medical Center977 clinicians in the group
- Carilion Healthcare Corporation536 clinicians in the group
- Carilion Giles Community Hospital228 clinicians in the group
- Carilion Rockbridge Community Hospital107 clinicians in the group
- Carilion Tazewell Community Hospital76 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Lexington
Clinicians with the same Medicare primary specialty in Lexington, VA — not a recommendation.
Other clinicians in Carilion Medical Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Eastern Virginia Medical School |
| Graduation year | 1983 (43 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740250927 |
| 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