npidata.org
Products
Provider RadarWatch an area and specialty — weekly alerts on new cliniciansPractice RadarWeekly alerts when new organisations register nearbyPhysician listsMDs and DOs with addresses and phone numbersNP listsNurse practitioners, the fastest-growing groupAPIJSON, delta feed, free tier
Use cases
Healthcare sales prospectingPhysician recruiting and locum staffingMedical device sales territory planningCredentialing and provider verificationHealthcare marketing lists and audience buildingPharmaceutical sales and prescriber targeting
Account
Start freeThree radars and an export a month Sign in Pricing
Explore
Data Labs Specialties States API

Search › Illinois › Internal Medicine Physician

Seng Leong, MD

NPI 1487750790 · on the registry since 2006 · sole proprietor

Practice

Address
27750 W Highway 22
Barrington, IL 60010
Phone
(847) 381-5800
Fax
(847) 381-5873
Organisation at this address
Thrive Ob Sc
Thrive Ob Sc
Randy Zimmerman M.D.,P.C.
Inferred from a shared address, not stated in the registry.
Clinicians at this address
26

Registry record

Primary taxonomy
Internal Medicine Physician
207R00000X
Licence states on file
IL
From the registry's licence fields, which are often incomplete.
Sex
Male
Record last updated
2025-03-31

Source: CMS National Plan and Provider Enumeration System. Registration is not the same as practising, and the registry records no retirement — some people listed here no longer practise. More in Illinois