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GENE Z CHIAO MD
NPI 1699733188
Internal Medicine in Northbrook, IL

Active since May 03, 2006Opted out of Medicare · through Jun 3, 2028
93.08/100
CMS Quality Rating
40 SKOKIE BLVD., SUITE 110, NORTHBROOK, IL 60062(224) 207-4400(224) 407-2255 Get Directions Write a Review

NPPES record last updated: September 26, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Gene Z Chiao Md NPPES

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

GENE Z CHIAO MD (NPI 1699733188) is an individual internal medicine provider in Northbrook, Illinois, licensed in Illinois (036-079891) and active in the NPI registry since May 2006. He has opted out of Medicare through June 3, 2028 and remains eligible to order and refer.

NPPES Registry Identity

NPI1699733188
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameGENE Z CHIAOCredential: MD
Location Address40 SKOKIE BLVD., SUITE 110Northbrook, IL 60062-1614
Mailing Address950 Technology Way, Suite 250Libertyville, IL 60048-5366 · (847) 433-3460 · Fax (847) 433-4062
Phone(224) 207-4400
Fax(224) 407-2255
Sole ProprietorNo
Enumeration DateMay 3, 2006
Last NPPES UpdateSeptember 26, 2025
NPPES CertifiedSeptember 26, 2025
✔ NPI 1699733188 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 036-079891
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.
40 SKOKIE BLVD., Northbrook, IL 60062
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Gene Z Chiao Md has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from June 3, 2024 through June 3, 2028.

Opt-Out Effective DateJune 3, 2024
Opt-Out In Effect ThroughJune 3, 2028Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60062 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

93.08/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality80.79
Promoting Interoperability100
Improvement Activities40

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.

BRETT RIEDERMAN MD
Internal Medicine
40 SKOKIE BLVD., SUITE 110
NORTHBROOK, IL 60062
Cook County (224) 407-4400
DR. TARA N TROY MD.
Specialist
40 SKOKIE BLVD., SUITE 110
NORTHBROOK, IL 60062
Cook County (224) 407-4400
CLAUS J FIMMEL MD
Internal Medicine (Gastroenterology)
40 SKOKIE BLVD., SUITE 110
NORTHBROOK, IL 60062
Cook County (224) 407-4400
KRISTHINE FIDEL NAGUE NP
Clinical Nurse Specialist (Family Health)
40 SKOKIE BLVD., SUITE 110
NORTHBROOK, IL 60062
Cook County (224) 407-4400

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 Gene Chiao's NPI number?

The NPI number for Gene Chiao is 1699733188. It was assigned to this individual provider in the NPPES registry on May 3, 2006.

Where is Gene Chiao located?

Gene Chiao practices at 40 Skokie Blvd. Suite 110, Northbrook, IL 60062. The listed phone number is (224) 207-4400.

What is Gene Chiao's specialty?

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

Is Gene Chiao enrolled in Medicare?

No. Gene Chiao has opted out of Medicare through June 3, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Gene Chiao was last updated on September 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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.