Quick answers
- Does Jonathan Youssefzadeh accept Medicare assignment?
- Yes. Medicare's clinician data says Jonathan Youssefzadeh 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 Youssefzadeh see?
- In 2024, CMS data shows 818 Original Medicare patients and 4,527 services for Jonathan Youssefzadeh. This counts Original Medicare only and measures volume, not quality.
- What is Jonathan Youssefzadeh's NPI number?
- 1811415631. 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 Youssefzadeh, 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 | 818 |
|---|---|
| Services billed to Medicare | 4,527 |
| Different services or procedures | 23 |
| 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 35 minutes (99232)1,702 services
- Advance care planning, first 30 minutes (99497)512 services
- Critical care, first 30-74 minutes (99291)400 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)382 services
- Hospital discharge day management, more than 30 minutes (99239)376 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%
- Diabetes69%
- Chronic kidney disease64%
- Arthritis62%
- Depression58%
Hospitals where Jonathan Youssefzadeh works
Medicare's Facility Affiliation Data lists Jonathan Youssefzadeh 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.
- College Medical CenterLong Beach, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050776
- East Los Angeles Doctors HospitalLos Angeles, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050641
- Los Angeles Community HospitalLos Angeles, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050663
- San Gabriel Valley Medical CenterSan Gabriel, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050132
- Southern California Hospital at HollywoodHollywood, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050135
Practice locations
Addresses where Jonathan Youssefzadeh is enrolled with Medicare (CMS data updated October 2, 2026).
- 1086 S Fairfax AveLos Angeles, CA 90019 (424) 258‑0124
- 14860 Roscoe Blvd, Suite 200Panorama City, CA 91402 (310) 553‑5203
- 1701 Santa Anita AveS El Monte, CA 91733 (626) 579‑7777
Group practices
Medicare enrollment lists Jonathan Youssefzadeh as a member of these groups (CMS data updated October 2, 2026).
- Hospitalist Group of Montebello Inc58 clinicians in the group
- Innovative Medical Solutions Inc a Medical Group37 clinicians in the group
- Ghods Inc7 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.
Other clinicians in Hospitalist Group of Montebello Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2017 (9 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) | 1811415631 |
| 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