Zainulabuddin Syed, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

036091132 Issued in IL

Practice address

4121 Fairview Ave Ste L1
Downers Grove, IL 60515-2265

Phone

(630) 968-4790

Fax

(630) 968-8755

NPI assigned

Jul 22, 2005

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in IL

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Internal Medicine

Education

Other, 1973

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Practice addresses (Care Compare)

Hospital & facility affiliations

• Advocate Home Health Care Serv Home health agency, Oakbrook, IL, CCN 147150
• Advocate Good Samaritan Hospital Hospital, Downers Grove, IL, CCN 140288
• Advocate Illinois Masonic Medical Center Hospital, Chicago, IL, CCN 140182
• Edward Hospital Hospital, Naperville, IL, CCN 140231
• Burgess Square Healthcare Ctr Nursing home, Westmont, IL, CCN 145219

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Fairview Ogden Medical Group LTD.

  dba Fairview Ogden Medical Group

  • Internal Medicine Physician
  • Downers Grove, IL
  • NPI 1962683359
  Medicare reassignment NPD Authorized official
• Z. Syed, M.D.

  • Primary Care Clinic/Center
  • Downers Grove, IL
  • NPI 1225205081
  NPD (past) Authorized official
• Sabs Corporation

  • Internal Medicine Physician
  • Bolingbrook, IL
  • NPI 1023344421
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Advocate Health and Hospitals Corporation

  dba Advocate Good Samaritan Hospital

  • General Acute Care Hospital
  • Downers Grove, IL
  • NPI 1578670543
  Care Compare affiliation
• Advocate North Side Health Network

  dba Advocate Illinois Masonic Medical Center

  • General Acute Care Hospital
  • Chicago, IL
  • NPI 1912014564
  Care Compare affiliation
• Burgess Square Healthcare and Rehabilitation Centre, LLC

  • Skilled Nursing Facility
  • Westmont, IL
  • NPI 1114204831

  Nursing home

  Care Compare affiliation
• Edward Hospital

  dba Endeavor Health Edward Hospital

  • General Acute Care Hospital
  • Naperville, IL
  • NPI 1427069632
  Care Compare affiliation
• Ehs Home Health Care Service Inc

  dba Advocate Home Health Services

  • Home Health Agency
  • Oak Brook, IL
  • NPI 1598732075
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1121990400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772409600000",
    "number": "1609876424",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4121 FAIRVIEW AVE STE L1",
            "city": "DOWNERS GROVE",
            "state": "IL",
            "postal_code": "605152265",
            "telephone_number": "630-968-4790",
            "fax_number": "630-968-8755"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4121 FAIRVIEW AVE STE L1",
            "city": "DOWNERS GROVE",
            "state": "IL",
            "postal_code": "605152265",
            "telephone_number": "630-968-4790",
            "fax_number": "630-968-8755"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SYED",
        "first_name": "ZAINULABUDDIN",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-07-22",
        "last_updated": "2026-03-02",
        "certification_date": "2026-03-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036091132",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Erin Sweeney, OTR/L
• Erin Elizabeth Swiatek, PA-C
• Teri Sycks, MS, CCC-SLP
• Nazneen Syed
• Sarah Syed, RDMS
• Synapse House
• Synergy Rehabilitaion & Chiropractic
• Jamie Allison Sypniewski, M.S., CCC-SLP
• Melissa Szachowicz
• Evelyn Szaflarski

• Internal Medicine Physician in Downers Grove, IL
• Providers in Downers Grove, IL by specialty
• Internal Medicine Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 2, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.