OrganizationActive
William Seng Tan, Sc
NPI 1497513840 · Family Medicine Physician · Olympia Fields, IL
Provider details
- NPI number
- 1497513840
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- William Tan, President(708) 283-8300
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Established profile(57/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
2 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
20060 Governors Dr Ste 204
Olympia Fields, IL 60461-1099
Phone: (708) 283-8300
Fax: (708) 283-9245
Street-level locationGet directions
Mailing address
20060 Governors Dr Ste 204
Olympia Fields, IL 60461-1099
Registry dates
- Enumerated
- 2024-03-11
- Last updated
- 2024-03-11
- Certified
- 2024-03-11
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.