npidata.org Sign in
Products
Provider RadarWatch an area and specialty — weekly alerts on new cliniciansPractice RadarWeekly alerts when new organisations register nearbySpecialtiesEvery NUCC taxonomy, with counts by state and cityStatesProvider counts and breakdowns for all 50 statesPhysician 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 API
About
About usTermsPrivacyContact us

Search › Illinois › Internal Medicine Physician

Zainulabuddin Syed, M.D

NPI 1609876424 · on the registry since 2005

Practice

Address
4121 Fairview Ave Ste L1
Downers Grove, IL 60515
Phone
(630) 968-4790
Fax
(630) 968-8755
Organisation at this address
Z. Syed, M.D.
Rmu Neurology Sc
Willowbrook Clinic
Precisionimagingusa
M&S Arain M D S & S C
Inferred from a shared address, not stated in the registry.
Clinicians at this address
14

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
2026-03-02

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