Quick answers
- Does Joel G. Greenya accept Medicare assignment?
- Yes. Medicare's clinician data says Joel G. Greenya 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 Joel G. Greenya see?
- In 2024, CMS data shows 29 Original Medicare patients and 106 services for Joel G. Greenya. This counts Original Medicare only and measures volume, not quality.
- What is Joel G. Greenya's NPI number?
- 1790280915. 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 Joel G. Greenya, 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 | 29 |
|---|---|
| Services billed to Medicare | 106 |
| Different services or procedures | 5 |
| Participating Medicare provider | Yes |
| Average age of these patients | 52 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)57 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)38 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).
- Depression66%
- Anxiety59%
Hospitals where Joel G. Greenya works
Medicare's Facility Affiliation Data lists Joel G. Greenya 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.
- Community Memorial HospitalMenomonee Falls, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520103
- Froedtert Memorial Lutheran HospitalMilwaukee, WI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 520177
Practice locations
Addresses where Joel G. Greenya is enrolled with Medicare (CMS data updated October 2, 2026).
- W168n11237 Western AveGermantown, WI 53022 (262) 253‑5060
- W180n8000 Town Hall RdMenomonee Falls, WI 53051 (262) 255‑2500
- W180n8085 Town Hall Rd, Fl 3Menomonee Falls, WI 53051 (262) 251‑1000
Group practices
Medicare enrollment lists Joel G. Greenya as a member of this group (CMS data updated October 2, 2026).
- Froedtert Andthe Medical College of Wisconsin Community Physicians Inc1,285 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Germantown
Clinicians with the same Medicare primary specialty in Germantown, WI — not a recommendation.
Other clinicians in Froedtert Andthe Medical College of Wisconsin Community Physicians Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2018 (8 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1790280915 |
| 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