Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Joan Joonsun Ryoo, MD, MSHS

Individual provider Surgery Physician · NPI 1699854596

Dr. Joan Joonsun Ryoo, MD, MSHS is a Radiation Oncology in Los Angeles, California. Graduated from Harvard Medical School in 2004, 22 years ago. Practices with Southern California Permanente Medical Group, an 11,242-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California and Massachusetts.

Years since qualifying
22
Trained at
Harvard Medical School
Licensed in
CA, MA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

4950 W Sunset Blvd Second Fl
Los Angeles, CA 90027-5822
Phone: (323) 783-2841
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Therapeutic Radiology Physician (primary) Taxonomy 2085R0203X · Licence A98329 (CA)
Surgery Physician Taxonomy 208600000X · Licence 221442 (MA)

Record details

NPI number1699854596
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD , MSHS
Sole proprietorNo
NPI enumeratedNovember 3, 2006
Last updated in NPPESDecember 1, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyRADIATION ONCOLOGY
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 2004 (22 years in practice)
Group practice Southern California Permanente Medical Group — 11242 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

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