Quick answers
- Does Brian M. Grieves accept Medicare assignment?
- Yes. Medicare's clinician data says Brian M. Grieves 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 Brian M. Grieves see?
- In 2024, CMS data shows 22 Original Medicare patients and 179 services for Brian M. Grieves. This counts Original Medicare only and measures volume, not quality.
- What is Brian M. Grieves's NPI number?
- 1588606966. 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 Brian M. Grieves, 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 | 22 |
|---|---|
| Services billed to Medicare | 179 |
| Different services or procedures | 3 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Chiropractic manipulative treatment, 3-4 spinal regions (98941)67 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 cholesterol59%
- High blood pressure55%
Practice locations
Addresses where Brian M. Grieves is enrolled with Medicare (CMS data updated October 2, 2026).
- 150 C County Rd BShawano, WI 54166 (715) 524‑8722
- W3275 Wolf River DrKeshena, WI 54135 (715) 524‑8722
- W3275 Wolf River Rd, PO Box 970Keshena, WI 54135
- W3275 Wolf River Rd P O Box, Suite 970Keshena, WI 54135
Group practices
Medicare enrollment lists Brian M. Grieves as a member of this group (CMS data updated October 2, 2026).
- Menominee Indian Tribe of Wisconsin24 clinicians in the group
Specialties
- Chiropracticprimary
Other chiropractors in Shawano
Clinicians with the same Medicare primary specialty in Shawano, WI — not a recommendation.
Other clinicians in Menominee Indian Tribe of Wisconsin
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CH |
|---|---|
| School | Northwestern College Of Chiropractic |
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588606966 |
| 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