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

Tammy Y Yao-Hong, DO

Individual provider Internal Medicine Physician · NPI 1801108261

Tammy Y Yao-Hong, DO is an Internal Medicine in Evanston, Illinois. Graduated from Mid West Medical College in 2010, 16 years ago. Practices with Southern California Permanente Medical Group, an 11,242-clinician group and accepts Medicare assignment. Licensed in California and Illinois.

Years since qualifying
16
Trained at
Mid West Medical College
Licensed in
CA, IL
In the registry since
2010
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

2650 Ridge Ave
Evanston, IL 60201-1718
Phone: (847) 570-2509
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 20A12801 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 125057961 (IL)

Record details

NPI number1801108261
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorYes
NPI enumeratedJuly 13, 2010
Last updated in NPPESNovember 18, 2021
Certification dateNovember 18, 2021

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolMID WEST MEDICAL COLLEGE
Graduated 2010 (16 years in practice)
Group practice Southern California Permanente Medical Group — 11242 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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