DR. ZAINULABUDDIN SYED M.D.
NPI 1609876424
Internal Medicine in Downers Grove, IL
About Dr. Zainulabuddin Syed M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ZAINULABUDDIN SYED M.D. (NPI 1609876424) is an individual internal medicine provider in Downers Grove, Illinois, licensed in Illinois (036091132) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS, is affiliated with Advocate Illinois Masonic Medical Center, and is a graduate of Other (1973).
NPPES Registry Identity
Specialties & Licenses
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Zainulabuddin Syed M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Areas of Expertise CMS Part B claims 10
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Advocate Illinois Masonic Medical Center
Acute Care Hospitals · Chicago, ILEdward Hospital
Acute Care Hospitals · Naperville, ILAdvocate Good Samaritan Hospital
Acute Care Hospitals · Downers Grove, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60515 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DOWNERS GROVE, IL 60515
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Zainulabuddin Syed's NPI number?
The NPI number for Zainulabuddin Syed is 1609876424. It was assigned to this individual provider in the NPPES registry on July 22, 2005.
Where is Zainulabuddin Syed located?
Zainulabuddin Syed practices at 4121 Fairview Ave Ste L1, Downers Grove, IL 60515. The listed phone number is (630) 968-4790.
What is Zainulabuddin Syed's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Zainulabuddin Syed enrolled in Medicare?
Yes. Zainulabuddin Syed is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
What insurance does Zainulabuddin Syed accept?
Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list Zainulabuddin Syed as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Zainulabuddin Syed affiliated with any hospitals?
According to CMS data, Zainulabuddin Syed is affiliated with Advocate Illinois Masonic Medical Center, Edward Hospital and Advocate Good Samaritan Hospital.
When was this NPI record last updated?
The NPPES record for Zainulabuddin Syed was last updated on March 2, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.
