Quick answers
- Where does Joan J. Ryoo see patients?
- Medicare's clinician data lists 4 practice locations, including Los Angeles, CA and Woodland Hills, CA. Call before your visit to confirm the address.
- What is Joan J. Ryoo's specialty?
- Medicare lists Radiation Oncology as the primary specialty.
- Does Joan J. Ryoo accept Medicare assignment?
- Yes. Medicare's clinician data says Joan J. Ryoo accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Joan J. Ryoo offer telehealth?
- Medicare's clinician data says Joan J. Ryoo offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Joan J. Ryoo?
- (323) 783-4011, as listed in official Medicare / NPI Registry data.
- What is Joan J. Ryoo's NPI number?
- 1699854596. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Joan J. Ryoo is enrolled with Medicare (CMS data updated 2026-10-02).
- 4725 -4733 Sunset BlvdLos Angeles, CA 90027 (323) 783‑4011
- 4733 W Sunset BlvdLos Angeles, CA 90027 (213) 667‑4784
- 4950 W Sunset BlvdLos Angeles, CA 90027 (323) 783‑4011
- 5601 De Soto AveWoodland Hills, CA 91367 (818) 719‑2000
Group practices
Medicare enrollment lists Joan J. Ryoo as a member of this group (CMS data updated 2026-10-02).
- Southern California Permanente Medical Group11,293 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 2004 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1699854596 |
| 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
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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