Quick answers
- Does Joy L. Mendoza accept Medicare assignment?
- Yes. Medicare's clinician data says Joy L. Mendoza 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 Joy L. Mendoza see?
- In 2024, CMS data shows 378 Original Medicare patients and 1,000 services for Joy L. Mendoza. This counts Original Medicare only and measures volume, not quality.
- What is Joy L. Mendoza's NPI number?
- 1720499783. 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 Joy L. Mendoza, 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 | 378 |
|---|---|
| Services billed to Medicare | 1,000 |
| Different services or procedures | 15 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)643 services
- Hospital discharge day management, more than 30 minutes (99239)146 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)106 services
- Critical care, first 30-74 minutes (99291)31 services
- Advance care planning, first 30 minutes (99497)30 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%
- Arthritis49%
- Chronic kidney disease49%
- Diabetes48%
- Heart failure48%
Hospitals where Joy L. Mendoza works
Medicare's Facility Affiliation Data lists Joy L. Mendoza 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.
- SSM Health St Clare Hospital - BarabooBaraboo, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520057
- SSM Health St Mary's Hospital - JanesvilleJanesville, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520208
- SSM Health St Mary's Hospital - MadisonMadison, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520083
- Stoughton HospitalStoughton, WI · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 521343
- The Monroe ClinicMonroe, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520028
Practice locations
Addresses where Joy L. Mendoza is enrolled with Medicare (CMS data updated October 2, 2026).
- 3200 E Racine StJanesville, WI 53546 (608) 371‑8000
- 515 22nd AveMonroe, WI 53566 (608) 324‑2000
- 700 S Park St, Suite AMadison, WI 53715 (608) 260‑2900
- 707 14th StBaraboo, WI 53913 (608) 356‑1400
Group practices
Medicare enrollment lists Joy L. Mendoza as a member of these groups (CMS data updated October 2, 2026).
- Dean Health Systems Inc1,159 clinicians in the group
- The Monroe Clinic, Inc.199 clinicians in the group
- SSM Health Care of Wisconsin Inc14 clinicians in the group
Specialties
- Hospitalistprimary
Other hospitalists in Janesville
Clinicians with the same Medicare primary specialty in Janesville, WI — not a recommendation.
Other clinicians in Dean Health Systems Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720499783 |
| 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