MONICA HUYENTRAN LIEU PA
NPI 1184225377
Clinical Nurse Specialist - Psychiatric/Mental Health in Santa Ana, CA

Active since November 04, 2020PECOS EnrolledAccepts Medicare Assignment
999 N TUSTIN AVE STE 216, SANTA ANA, CA 92705(714) 545-5550 Get Directions Write a Review

NPPES record last updated: August 29, 2025. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Jul 12, 2022, May 17, 2022, Apr 6, 2022 and 1 more (4 updates tracked since 2020).

About Monica Huyentran Lieu Pa NPPES

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

MONICA HUYENTRAN LIEU PA (NPI 1184225377) is an individual psychiatric/mental health provider in Santa Ana, California, licensed in California (PA60511) and active in the NPI registry since November 2020. She is enrolled in Medicare PECOS and is a graduate of Other (2021).

NPPES Registry Identity

NPI1184225377
Entity TypeIndividualFemale
Primary Taxonomy364SP0808X
Provider Legal NameMONICA HUYENTRAN LIEUCredential: PA
Location Address999 N TUSTIN AVE STE 216Santa Ana, CA 92705-6506
Mailing Address19782 Macarthur Blvd Ste 300Irvine, CA 92612-2417 · (714) 545-5550
Sole ProprietorNo
Medical School CMSOtherGraduated 2021
Enumeration DateNovember 4, 2020
Last NPPES UpdateAugust 29, 20254 updates tracked since enumeration
NPPES CertifiedAugust 29, 2025
NPI 1184225377 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyClinical Nurse Specialist · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code364SP0808X
License Licensed in CA · PA60511
Also ListedPhysician AssistantTaxonomy 363A00000X · License 60511 (CA)
999 N TUSTIN AVE STE 216, Santa Ana, CA 92705

Other Names 1

Former Name (1)Monica Nguyen Pa

Accepted Insurance

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Monica Huyentran Lieu Pa 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 ID1254713084
PECOS Enrollment IDI20220726003737
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.

Areas of Expertise CMS Part B claims 6

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
191 services146 patients
Urinalysis, manual test 81002
A urinalysis is a simple, non-invasive test that checks the urine for various elements such as sugar, protein, and signs of infection. It can help detect many common conditions, including kidney disease and diabetes. The manual test involves a lab technician examining a urine sample.
23 services18 patients
Telephone medical discussion with physician, 5-10 minutes 99441
A telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.
20 services20 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
17 services17 patients
Amplifed dna or rna probe detection of severe acute respiratory syndrome coronavirus 2 (covid-19) antigen 87635
This is a lab test that detects the presence of COVID-19 in your body. It uses a technique to amplify the virus's genetic material, either DNA or RNA, making it easier to identify. A positive result indicates an active infection.
16 services16 patients
Telephone medical discussion with physician, 11-20 minutes 99442
This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.
12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92705 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
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 13

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

Physician Assistant
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Physician Assistant
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Pharmacy (Community/Retail Pharmacy)
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Physician Assistant
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Physician Assistant (Medical)
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Physician Assistant
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Nurse Practitioner (Psychiatric/Mental Health)
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Clinical Nurse Specialist (Psychiatric/Mental Health)
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705

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 Monica Lieu's NPI number?

The NPI number for Monica Lieu is 1184225377. It was assigned to this individual provider in the NPPES registry on November 4, 2020. The provider is also known as Monica Nguyen PA.

Where is Monica Lieu located?

Monica Lieu practices at 999 N Tustin Ave Ste 216, Santa Ana, CA 92705. The listed phone number is (714) 545-5550.

What is Monica Lieu's specialty?

The primary specialty registered for this NPI is Clinical Nurse Specialist, specializing in Psychiatric/Mental Health, with taxonomy code 364SP0808X.

Is Monica Lieu enrolled in Medicare?

Yes. Monica Lieu 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.

What insurance does Monica Lieu accept?

Health plans from Providence Health Plan list Monica Lieu 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 Monica Lieu was last updated on August 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.