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DR. GARY F. TZENG M.D.
NPI 1609823715
Anesthesiology in Naperville, IL

Active since May 27, 2006PECOS EnrolledAccepts Medicare Assignment
801 S WASHINGTON ST, NAPERVILLE, IL 60540(630) 355-0450 Get Directions Write a Review

NPPES record last updated: May 10, 2017. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Gary F. Tzeng M.d. NPPES

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

DR. GARY F. TZENG M.D. (NPI 1609823715) is an individual anesthesiology provider in Naperville, Illinois, licensed in Illinois (036095938) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1993).

NPPES Registry Identity

NPI1609823715
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. GARY F. TZENGCredential: M.D.
Location Address801 S WASHINGTON STNaperville, IL 60540-7430
Mailing Address387 Shuman Blvd, Suite 240wNaperville, IL 60563-8450 · (630) 355-0450
Phone(630) 355-0450
Sole ProprietorNo
Medical School CMSOtherGraduated 1993
Enumeration DateMay 27, 2006
Last NPPES UpdateMay 10, 2017
✔ NPI 1609823715 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in IL · 036095938
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
Also ListedPain Medicine · Interventional Pain MedicineTaxonomy 208VP0014X · License 036095938 (IL)
801 S WASHINGTON ST, Naperville, IL 60540
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Other Identifiers 3

Medicare ID-Type UnspecifiedK08063IL
Medicaid036095938IL
Medicare UPING57166IL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona, Oscar Health Plan, Inc..Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Gary F. Tzeng 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.

PECOS PAC ID3870565948
PECOS Enrollment IDI20190613003310
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.

Medicare Billing Reassignment

Medicare enrollment records show Gary Tzeng reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Valley Anesthesiology Consultants, Inc.
1,416 mi
Anesthesiology
2262 E ROSE GARDEN LN
Phoenix, AZ 85024
  • Reassigned Medicare billing, Arizona enrollment
  • 518 clinicians in this Medicare group
NPI 1285660704 (954) 939-5000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 3

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.

Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) 64447
This procedure involves injecting a numbing agent and/or steroid into a nerve in your thigh. It's done to alleviate pain or inflammation. A needle will be carefully positioned near the nerve, and the medicine will be administered.
17 services16 patients
Anesthesia for x-ray or radiation therapy 01922
Anesthesia for x-ray or radiation therapy involves administering medication to help you relax or sleep during the procedure. It's used to ensure comfort, minimize movement, and reduce anxiety. The type of anesthesia used depends on the procedure and patient's health.
16 services15 patients
Anesthesia for other procedure on large bowel using an endoscope 00811
Anesthesia for an endoscopic procedure on the large bowel ensures comfort and relaxation during the procedure. You'll be given medication to make you drowsy or asleep, eliminating any discomfort. The medication can be administered through a vein or inhaled.
11 services11 patients

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.

DR. HAFEZ M. SAMI M.D.
Pain Medicine (Interventional Pain Medicine)
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 348-3300
MICHAEL J. HARTMANN MD
Emergency Medicine
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3000
SEEMA ISHAQ JEELANI D.O.
Emergency Medicine
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3000
CORTNEY COLE MD
Family Medicine (Hospice and Palliative Medicine)
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3000
EDWARD HOSPITAL
General Acute Care Hospital
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 655-0450
DR. HODA A. EL- ASMAR MD
Internal Medicine (Infectious Disease)
801 S WASHINGTON ST, EDWARD HOSPITAL, ADMINISTRATION, VPMA OFFICE
NAPERVILLE, IL 60540
Dupage County (630) 527-5647
AMAAR MASOOD MALIK DO
Radiology (Diagnostic Radiology)
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3200
DR. SANGITA RANGALA M.D.
Emergency Medicine
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3288

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 Gary Tzeng's NPI number?

The NPI number for Gary Tzeng is 1609823715. It was assigned to this individual provider in the NPPES registry on May 27, 2006.

Where is Gary Tzeng located?

Gary Tzeng practices at 801 S Washington St, Naperville, IL 60540. The listed phone number is (630) 355-0450.

What is Gary Tzeng's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Gary Tzeng enrolled in Medicare?

Yes. Gary Tzeng 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.

Which organization bills Medicare for Gary Tzeng's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gary Tzeng reassigns Medicare benefits to Valley Anesthesiology Consultants, Inc. (Phoenix, AZ). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gary Tzeng's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gary Tzeng accept?

Health plans from Blue Cross Blue Shield of Arizona and Oscar Health Plan, Inc. list Gary Tzeng 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.

When was this NPI record last updated?

The NPPES record for Gary Tzeng was last updated on May 10, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.