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

Dr. William Seng Tan, DO

Individual provider Family Medicine Physician · NPI 1891112306

Dr. William Seng Tan, DO is a Family Practice in Olympia Fields, Illinois. Graduated from Nova Southeastern College of Osteo Medicine in 2013, 13 years ago. Accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
13
Trained at
Nova Southeastern College of Osteo Medicine
Licensed in
IL
In the registry since
2014
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

20060 Governors Dr Ste 204
Olympia Fields, IL 60461-1099
Phone: (708) 283-8300
Fax: (708) 283-9245
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 036144064 (IL)

Record details

NPI number1891112306
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 21, 2014
Last updated in NPPESDecember 25, 2021
Certification dateDecember 25, 2021
Mailing address20060 Governors Dr Ste 204, Olympia Fields, IL 60461-1099

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolNOVA SOUTHEASTERN COLLEGE OF OSTEO MEDICINE
Graduated 2013 (13 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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