Quick answers
- Does Robert J. Gruenenfelder accept Medicare assignment?
- Yes. Medicare's clinician data says Robert J. Gruenenfelder 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 Robert J. Gruenenfelder see?
- In 2024, CMS data shows 50 Original Medicare patients and 608 services for Robert J. Gruenenfelder. This counts Original Medicare only and measures volume, not quality.
- What is Robert J. Gruenenfelder's NPI number?
- 1639177330. 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 Robert J. Gruenenfelder, 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 | 50 |
|---|---|
| Services billed to Medicare | 608 |
| Different services or procedures | 2 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Chiropractic manipulative treatment, 3-4 spinal regions (98941)355 services
- Chiropractic manipulative treatment, 1-2 spinal regions (98940)253 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 pressure72%
- High cholesterol64%
- Arthritis56%
- Ischemic heart disease30%
- Diabetes24%
Practice locations
Addresses where Robert J. Gruenenfelder is enrolled with Medicare (CMS data updated October 2, 2026).
- 711 Hwy 68 ASweetwater, TN 37874 (423) 337‑3761
Specialties
- Chiropracticprimary
Other chiropractors in Tennessee
Clinicians with the same Medicare primary specialty in Tennessee — not a recommendation.
Clinician information
| Credential | DC |
|---|---|
| Chiropractic college | Logan College Of Chiropractic |
| Graduation year | 1988 (38 years since chiropractic college) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639177330 |
| 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
- 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