Quick answers
- Does Jonathan A. Frankel accept Medicare assignment?
- Yes. Medicare's clinician data says Jonathan A. Frankel 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 Jonathan A. Frankel see?
- In 2024, CMS data shows 59 Original Medicare patients and 65 services for Jonathan A. Frankel. This counts Original Medicare only and measures volume, not quality.
- What is Jonathan A. Frankel's NPI number?
- 1063770121. 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 Jonathan A. Frankel, 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 | 59 |
|---|---|
| Services billed to Medicare | 65 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Ct scan head or brain without contrast (70450)13 services
- Limited ultrasound scan of abdomen (76705)13 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 cholesterol66%
- Diabetes54%
- Arthritis47%
- Chronic kidney disease44%
- Ischemic heart disease39%
Hospitals where Jonathan A. Frankel works
Medicare's Facility Affiliation Data lists Jonathan A. Frankel 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.
- Kaiser Foundation Hospital - DowneyDowney, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 050139
- Kaiser Foundation Hospital - Los AngelesLos Angeles, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: not listed by Medicare · CCN 050138
- Kaiser Foundation Hospital - West LALos Angeles, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050561
- Kaiser Foundation Hospital Fontana/OntarioFontana, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050140
- Kaiser Foundation Hospital, RiversideRiverside, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050686
Practice locations
Addresses where Jonathan A. Frankel is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 24; the Medicare profile lists all.
- 1011 Balwin Park BlvdBaldwin Park, CA 91706 (626) 851‑1011
- 10800 Magnolia AveRiverside, CA 92505 (951) 353‑2000
- 1255 W Arrow HwySan Dimas, CA 91773 (909) 394‑2526
- 13652 Cantara StPanorama City, CA 91402 (818) 375‑2000
- 25821 Vermont AveHarbor City, CA 90710 (310) 325‑5111
Group practices
Medicare enrollment lists Jonathan A. Frankel as a member of this group (CMS data updated October 2, 2026).
- Southern California Permanente Medical Group11,293 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Baldwin Park
Clinicians with the same Medicare primary specialty in Baldwin Park, CA — not a recommendation.
Other clinicians in Southern California Permanente Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2012 (14 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1063770121 |
| 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