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GRACE HOANG-OANH NGUYEN M.D.
NPI 1063771319
Pediatrics in Pomona, CA

Active since May 07, 2012PECOS Enrolled
1532 SAN BERNARDINO AVE STE B7, POMONA, CA 91767(909) 301-4041(909) 301-4042 Get Directions Write a Review

NPPES record last updated: April 19, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 19, 2022, Jan 17, 2017, Aug 15, 2016 and 3 more (6 updates tracked since 2015).

About Grace Hoang-oanh Nguyen M.d. NPPES

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

GRACE HOANG-OANH NGUYEN M.D. (NPI 1063771319) is an individual pediatrics provider in Pomona, California, licensed in California (C175546) and active in the NPI registry since May 2012. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1063771319
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameGRACE HOANG-OANH NGUYENCredential: M.D.
Location Address1532 SAN BERNARDINO AVE STE B7Pomona, CA 91767-3559
Mailing Address4939 Woodfall Dr SwLilburn, GA 30047-7014 · (817) 703-3867
Phone(909) 301-4041
Fax(909) 301-4042
Sole ProprietorNo
Enumeration DateMay 7, 2012
Last NPPES UpdateApril 19, 20226 updates tracked since enumeration
NPPES CertifiedApril 19, 2022
✔ NPI 1063771319 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
Licenses✔ Licensed in CA · C175546✔ Licensed in GA · 74858
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
1532 SAN BERNARDINO AVE STE B7, Pomona, CA 91767
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Grace Hoang-oanh Nguyen M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Grace Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Choctaw Nation Of Oklahoma
1,225 mi
Primary Care
1801 CHUKKA HINA
Durant, OK 74701
  • Reassigned Medicare billing, Texas enrollment
  • 581 clinicians in this Medicare group
NPI 1396173449 (580) 920-2100

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 91767 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
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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.

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 Grace Nguyen's NPI number?

The NPI number for Grace Nguyen is 1063771319. It was assigned to this individual provider in the NPPES registry on May 7, 2012.

Where is Grace Nguyen located?

Grace Nguyen practices at 1532 San Bernardino Ave Ste B7, Pomona, CA 91767. The listed phone number is (909) 301-4041.

What is Grace Nguyen's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Grace Nguyen enrolled in Medicare?

Yes. Grace Nguyen is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Grace Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Grace Nguyen reassigns Medicare benefits to Choctaw Nation Of Oklahoma (Durant, OK). 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 Grace Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Grace Nguyen was last updated on April 19, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.