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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.

AJA WEI LOO
NPI 1871123323
Social Worker - Clinical in Irvine, CA

Active since January 23, 2020PECOS Enrolled

NPPES record last updated: June 23, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: May 20, 2026, Dec 6, 2023, Oct 12, 2023 and 4 more (7 updates tracked since 2020).

About Aja Wei Loo NPPES

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

AJA WEI LOO (NPI 1871123323) is an individual clinical provider in Irvine, California, licensed in California (138322) and active in the NPI registry since January 2020. She is enrolled in Medicare PECOS and is a graduate of Other (2022).

NPPES Registry Identity

NPI1871123323
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameAJA WEI LOO
Location Address18012 COWANIrvine, CA 92614-6800
Mailing Address18012 CowanIrvine, CA 92614-6800 · (209) 614-5409
Phone(714) 989-6019
Sole ProprietorYes
Medical School CMSOtherGraduated 2022
Enumeration DateJanuary 23, 2020
Last NPPES UpdateJune 23, 20267 updates tracked since enumeration
NPPES CertifiedJune 23, 2026
✔ NPI 1871123323 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in CA · 138322
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
18012 COWAN, Irvine, CA 92614
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Aja Wei Loo is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID1254802622
PECOS Enrollment IDI20260605003028
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92614 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
$0.00 typical visit price
range $62.96 – $187.60
Typical copayment $0.00 (range $15.74 – $46.90)
Most-billed visit code NA
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
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.

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 Aja Loo's NPI number?

The NPI number for Aja Loo is 1871123323. It was assigned to this individual provider in the NPPES registry on January 23, 2020.

Where is Aja Loo located?

Aja Loo practices at 18012 Cowan, Irvine, CA 92614. The listed phone number is (714) 989-6019.

What is Aja Loo's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Aja Loo enrolled in Medicare?

Yes. Aja Loo is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Aja Loo was last updated on June 23, 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.