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ARMAND WIDJAJA M.D.
NPI 1336335322
Pediatrics in Fountain Valley, CA

Active since September 24, 2007PECOS Enrolled
16333 HARBOR BLVD., ATTN: NETWORK MANAGEMENT, FOUNTAIN VALLEY, CA 92708(714) 549-1300(714) 433-3100 Get Directions Write a Review

NPPES record last updated: February 27, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Armand Widjaja M.d. NPPES

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

ARMAND WIDJAJA M.D. (NPI 1336335322) is an individual pediatrics provider in Fountain Valley, California, licensed in California (A98710) and active in the NPI registry since September 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1336335322
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameARMAND WIDJAJACredential: M.D.
Location Address16333 HARBOR BLVD., ATTN: NETWORK MANAGEMENTFountain Valley, CA 92708
Mailing Address16333 Harbor Blvd., Attn: Network ManagementFountain Valley, CA 92708 · (714) 549-1300 · Fax (714) 433-3100
Phone(714) 549-1300
Fax(714) 433-3100
Sole ProprietorNo
Enumeration DateSeptember 24, 2007
Last NPPES UpdateFebruary 27, 2026
NPPES CertifiedFebruary 27, 2026
✔ NPI 1336335322 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in CA · A98710
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.
16333 HARBOR BLVD., Fountain Valley, CA 92708
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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)

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

Memorialcare Medical Foundation
2.1 mi
Clinic/Center
17360 BROOKHURST ST
Fountain Valley, CA 92708
  • Reassigned Medicare billing, California enrollment
  • 948 clinicians in this Medicare group
NPI 1205167350 (877) 696-3622

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 92708 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.

Other Providers at the Same Location NPPES 2

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

LEAH PHAN D.O.
Family Medicine
16333 HARBOR BLVD.
FOUNTAIN VALLEY, CA 92708
Orange County (714) 549-1300
DR. ARFA BABAKNIA M.D.
Family Medicine
16333 HARBOR BLVD.
FOUNTAIN VALLEY, CA 92708
Orange County (714) 549-1300

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 Armand Widjaja's NPI number?

The NPI number for Armand Widjaja is 1336335322. It was assigned to this individual provider in the NPPES registry on September 24, 2007.

Where is Armand Widjaja located?

Armand Widjaja practices at 16333 Harbor Blvd. Attn: Network Management, Fountain Valley, CA 92708. The listed phone number is (714) 549-1300.

What is Armand Widjaja's specialty?

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

Is Armand Widjaja enrolled in Medicare?

Yes. Armand Widjaja is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Armand Widjaja's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Armand Widjaja reassigns Medicare benefits to Memorialcare Medical Foundation (Fountain Valley, CA). 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 Armand Widjaja'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 Armand Widjaja was last updated on February 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.