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CHEN ZHANG MD
NPI 1639601388
Internal Medicine in Oak Park, IL

Active since March 31, 2017PECOS EnrolledAccepts Medicare Assignment
101 MADISON ST STE 300, OAK PARK, IL 60302(708) 486-2700(708) 486-2702 Get Directions Write a Review

NPPES record last updated: August 25, 2020. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 8, 2026, Jun 13, 2023, Aug 25, 2020 and 4 more (7 updates tracked since 2017).

About Chen Zhang Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CHEN ZHANG MD (NPI 1639601388) is an individual internal medicine provider in Oak Park, Illinois, licensed in Illinois (036151127) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS and is a graduate of Other (2016).

NPPES Registry Identity

NPI1639601388
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameCHEN ZHANGCredential: MD
Location Address101 MADISON ST STE 300Oak Park, IL 60302-4210
Mailing Address101 Madison St Ste 300Oak Park, IL 60302-4210
Phone(708) 486-2700
Fax(708) 486-2702
Sole ProprietorNo
Medical School CMSOtherGraduated 2016
Enumeration DateMarch 31, 2017
Last NPPES UpdateAugust 25, 20207 updates tracked since enumeration
NPPES CertifiedAugust 25, 2020
✔ NPI 1639601388 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 036151127
Definition
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.
Also ListedHospitalistTaxonomy 208M00000X · License 036151127 (IL)
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
101 MADISON ST STE 300, Oak Park, IL 60302
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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

Chen Zhang Md 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.

PECOS PAC ID2769719608
PECOS Enrollment IDI20260521003406
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60302 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CIMPAR AT HOME, LLC
Home Health
101 MADISON ST STE 300
OAK PARK, IL 60302
Cook County (708) 486-2700
NIRALI PATEL MD, MBA
Internal Medicine (Cardiovascular Disease)
101 MADISON ST STE 300
OAK PARK, IL 60302
Cook County (708) 486-2700
DR. MUJTABA HUSSAIN MBBS
Internal Medicine
101 MADISON ST STE 300
OAK PARK, IL 60302
Cook County (708) 486-2700
CIMPAR DIAGNOSTICS LLC
Radiology (Diagnostic Radiology)
101 MADISON ST STE 300
OAK PARK, IL 60302
Cook County (773) 849-9406
DR. ANTHONY ABADIR MD
Psychiatry & Neurology (Psychiatry)
101 MADISON ST STE 300
OAK PARK, IL 60302
Cook County (708) 486-2700
RASHIDAH SEMBATYA FNP-C
Nurse Practitioner (Family)
101 MADISON ST STE 300
OAK PARK, IL 60302
Cook County (708) 486-2700
DR. SHANLI PARNIA M.D.
Internal Medicine
101 MADISON ST STE 300
OAK PARK, IL 60302
Cook County (708) 486-2700
TERESITA BERNABE
Nurse Practitioner (Adult Health)
101 MADISON ST STE 300
OAK PARK, IL 60302
Cook County (708) 486-2700

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 Chen Zhang's NPI number?

The NPI number for Chen Zhang is 1639601388. It was assigned to this individual provider in the NPPES registry on March 31, 2017.

Where is Chen Zhang located?

Chen Zhang practices at 101 Madison St Ste 300, Oak Park, IL 60302. The listed phone number is (708) 486-2700.

What is Chen Zhang's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Chen Zhang enrolled in Medicare?

Yes. Chen Zhang 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.

When was this NPI record last updated?

The NPPES record for Chen Zhang was last updated on August 25, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.