Quick answers
- Does Joseph M. Lewis accept Medicare assignment?
- Medicare's clinician data says Joseph M. Lewis may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Joseph M. Lewis see?
- In 2024, CMS data shows 15 Original Medicare patients and 146 services for Joseph M. Lewis. This counts Original Medicare only and measures volume, not quality.
- What is Joseph M. Lewis's NPI number?
- 1790843647. 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 Joseph M. Lewis, 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 | 15 |
|---|---|
| Services billed to Medicare | 146 |
| Different services or procedures | 1 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Chiropractic manipulative treatment, 1-2 spinal regions (98940)146 services
Practice locations
Addresses where Joseph M. Lewis is enrolled with Medicare (CMS data updated October 2, 2026).
- 4811 S 76th St, Suite 204Greenfield, WI 53220 (414) 281‑5266
Group practices
Medicare enrollment lists Joseph M. Lewis as a member of this group (CMS data updated October 2, 2026).
- Zastrow Chiropractic Clinic S C2 clinicians in the group
Specialties
- Chiropracticprimary
Other chiropractors in Greenfield
Clinicians with the same Medicare primary specialty in Greenfield, WI — not a recommendation.
Other clinicians in Zastrow Chiropractic Clinic S C
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DC |
|---|---|
| Chiropractic college | Palmer College Chiropractic - Davenport |
| Graduation year | 1991 (35 years since chiropractic college) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1790843647 |
| 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