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

Ryan Hyun Wook Joo, MD

Individual provider Infectious Disease Physician · NPI 1639301922

Ryan Hyun Wook Joo, MD is an Infectious Disease in Pasadena, California. Qualified in 2009, 17 years ago. Accepts Medicare assignment. Licensed in California.

Years since qualifying
17
Licensed in
CA
In the registry since
2009
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

960 E Green St Ste 105
Pasadena, CA 91106-2443
Phone: (626) 304-0782
Fax: (626) 658-2848
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence A114398 (CA)

Record details

NPI number1639301922
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 20, 2009
Last updated in NPPESNovember 1, 2023
Certification dateOctober 31, 2023

Medicare enrollment

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

Medicare specialtyINFECTIOUS DISEASE
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2009 (17 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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