Quick answers
- Does Robert F. Zimmerman accept Medicare assignment?
- Yes. Medicare's clinician data says Robert F. Zimmerman 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 F. Zimmerman see?
- In 2024, CMS data shows 378 Original Medicare patients and 1,235 services for Robert F. Zimmerman. This counts Original Medicare only and measures volume, not quality.
- What is Robert F. Zimmerman's NPI number?
- 1619294352. 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 F. Zimmerman, 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 | 1,235 |
| Different services or procedures | 10 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)397 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)286 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)261 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)103 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)20 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%
- Arthritis58%
- Chronic kidney disease55%
- Diabetes51%
- Heart failure47%
Hospitals where Robert F. Zimmerman works
Medicare's Facility Affiliation Data lists Robert F. Zimmerman 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.
- Mercy General HospitalSacramento, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050017
- Mercy Hospital of FolsomFolsom, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050414
- Mercy San Juan Medical CenterCarmichael, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050516
- Methodist Hospital of SacramentoSacramento, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050590
Practice locations
Addresses where Robert F. Zimmerman is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 8; the Medicare profile lists all.
- 1650 Creekside DrFolsom, CA 95630 (916) 983‑7476
- 1700 Prairie City RdFolsom, CA 95630 (916) 351‑4800
- 1730 Prairie City Rd, Suite 120Folsom, CA 95630 (916) 351‑4800
- 3000 Q StSacramento, CA 95816 (916) 560‑0319
- 4001 J StSacramento, CA 95819 (916) 453‑4414
Group practices
Medicare enrollment lists Robert F. Zimmerman as a member of this group (CMS data updated October 2, 2026).
- Dignity Health Medical Foundation1,184 clinicians in the group
Specialties
- Infectious Diseaseprimary
Other infectious disease doctors in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Other clinicians in Dignity Health Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 2010 (16 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) | 1619294352 |
| 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