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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

JOSEPHINE BA NGUYEN M.D.
NPI 1487185583
Obstetrics & Gynecology - Gynecology in Elmhurst, IL

Active since March 21, 2017PECOS EnrolledAccepts Medicare Assignment
133 E BRUSH HILL RD STE 308, ELMHURST, IL 60126(331) 221-9006(331) 221-2734 Get Directions Write a Review

NPPES record last updated: September 1, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 1, 2026, Mar 9, 2026, Dec 20, 2021 and 2 more (5 updates tracked since 2017).

About Josephine Ba Nguyen M.d. NPPES

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

JOSEPHINE BA NGUYEN M.D. (NPI 1487185583) is an individual gynecology provider in Elmhurst, Illinois, licensed in Illinois (036178663) and active in the NPI registry since March 2017. She is enrolled in Medicare PECOS and is a graduate of Other (2017).

NPPES Registry Identity

NPI1487185583
Entity TypeIndividualFemale
Primary Taxonomy207VG0400X
Provider Legal NameJOSEPHINE BA NGUYENCredential: M.D.
Location Address133 E BRUSH HILL RD STE 308Elmhurst, IL 60126-5662
Mailing Address2650 Ridge Ave # 1223Evanston, IL 60201-1700 · (847) 982-3175 · Fax (847) 982-3394
Phone(331) 221-9006
Fax(331) 221-2734
Sole ProprietorNo
Medical School CMSOtherGraduated 2017
Enumeration DateMarch 21, 2017
Last NPPES UpdateSeptember 1, 20265 updates tracked since enumeration
NPPES CertifiedSeptember 1, 2026
✔ NPI 1487185583 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & Gynecology · GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207VG0400X
Licenses✔ Licensed in IL · 036178663✔ Licensed in CA · A157172
Definition
A physician who specializes in diagnosis, treatment, and management of patients with gynecologic conditions. Source: National Uniform Claim Committee
Also ListedObstetrics & GynecologyTaxonomy 207V00000X · License 036178663 (IL)
133 E BRUSH HILL RD STE 308, Elmhurst, IL 60126
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Oscar Health.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

Josephine Ba Nguyen 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 ID2466703624
PECOS Enrollment IDI20210820002384, I20260309001623
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 Reassignments

2

Medicare enrollment records show Josephine Nguyen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Endeavor Health Medical Group
19 mi
Allergy & Immunology
1000 CENTRAL ST
Evanston, IL 60201
  • Reassigned Medicare billing, Illinois enrollment
  • 4,841 clinicians in this Medicare group
NPI 1497701882 (847) 570-5235
Permanente Medical Group Inc
1,780 mi
Internal Medicine
7373 WEST LANE
Stockton, CA 95210
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1548343510 (209) 476-2000

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60126 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
$137.43 typical visit price
range $59.81 – $181.38
Typical copayment $34.35 (range $14.95 – $45.34)
Most-billed visit code 99204
Established Patient
$74.38 typical visit price
range $19.15 – $147.12
Typical copayment $18.59 (range $4.78 – $36.78)
Most-billed visit code 99213
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 9

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

SHANNON C. PETTIT MD
Obstetrics & Gynecology
133 E BRUSH HILL RD STE 308
ELMHURST, IL 60126
Dupage County (331) 221-9006
ARMANDO A SAN JUAN MD
Obstetrics & Gynecology
133 E BRUSH HILL RD STE 308
ELMHURST, IL 60126
Dupage County (331) 221-9006
DR. JOSEPH J FURLIN MD
Obstetrics & Gynecology
133 E BRUSH HILL RD STE 308
ELMHURST, IL 60126
Dupage County (331) 221-9006
ANTONIO J BRAVO MD
Obstetrics & Gynecology
133 E BRUSH HILL RD STE 308
ELMHURST, IL 60126
Dupage County (331) 221-9006
MARCO L MARTINEZ MD
Obstetrics & Gynecology
133 E BRUSH HILL RD STE 308
ELMHURST, IL 60126
Dupage County (331) 221-9006
ANAMARTA LAMOUTTE MARTINEZ PA-C
Physician Assistant
133 E BRUSH HILL RD STE 308
ELMHURST, IL 60126
Dupage County (331) 221-9006
MS. SHIRLEY J MOORE APN, CNM
Advanced Practice Midwife
133 E BRUSH HILL RD STE 308
ELMHURST, IL 60126
Dupage County (331) 221-9006
TERESSA ALEXANDER M.D.
Obstetrics & Gynecology
133 E BRUSH HILL RD STE 308
ELMHURST, IL 60126
Dupage County (331) 221-9006

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 Josephine Nguyen's NPI number?

The NPI number for Josephine Nguyen is 1487185583. It was assigned to this individual provider in the NPPES registry on March 21, 2017.

Where is Josephine Nguyen located?

Josephine Nguyen practices at 133 E Brush Hill Rd Ste 308, Elmhurst, IL 60126. The listed phone number is (331) 221-9006.

What is Josephine Nguyen's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecology, with taxonomy code 207VG0400X.

Is Josephine Nguyen enrolled in Medicare?

Yes. Josephine Nguyen 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 organizations bill Medicare for Josephine Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Josephine Nguyen reassigns Medicare benefits to 2 organizations: Endeavor Health Medical Group (Evanston, IL) and Permanente Medical Group Inc (Stockton, CA). Each 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 Josephine Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Josephine Nguyen accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Josephine Nguyen 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 Josephine Nguyen was last updated on September 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 52 days 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.