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NIKI THI NGUYEN PMHNP
NPI 1538919618
Nurse Practitioner - Psychiatric/Mental Health in Worcester, MA

Active since March 25, 2024PECOS Enrolled
425 LAKE AVE N STE 101, WORCESTER, MA 01605(508) 753-3220(508) 753-3224 Get Directions Write a Review

NPPES record last updated: February 2, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Niki Thi Nguyen Pmhnp NPPES

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

NIKI THI NGUYEN PMHNP (NPI 1538919618) is an individual psychiatric/mental health provider in Worcester, Massachusetts, licensed in Massachusetts (RN2302779) and active in the NPI registry since March 2024. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1538919618
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameNIKI THI NGUYENCredential: PMHNP
Location Address425 LAKE AVE N STE 101Worcester, MA 01605-2073
Mailing Address425 Lake Ave N Ste 101Worcester, MA 01605-2073 · (508) 753-3220 · Fax (508) 753-3224
Phone(508) 753-3220
Fax(508) 753-3224
Sole ProprietorNo
Enumeration DateMarch 25, 2024
Last NPPES UpdateFebruary 2, 2025
NPPES CertifiedFebruary 2, 2025
✔ NPI 1538919618 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in MA · RN2302779
425 LAKE AVE N STE 101, Worcester, MA 01605
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Harvard Pilgrim Health Care.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

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

Advanced Psych Services, LLC
Same address
Mental Health (Including Community Mental Health Center)
425 LAKE AVE N STE 101
Worcester, MA 01605
  • Reassigned Medicare billing, Massachusetts enrollment
  • 22 clinicians in this Medicare group
NPI 1750648689 (508) 753-3220

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 01605 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
$90.70 typical visit price
range $58.86 – $177.36
Typical copayment $22.67 (range $14.71 – $44.34)
Most-billed visit code 99203
Established Patient
$103.48 typical visit price
range $19.11 – $144.84
Typical copayment $25.87 (range $4.77 – $36.21)
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 10

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

ALYSSA ANN FERLAND PMHNP
Nurse Practitioner (Psychiatric/Mental Health)
425 LAKE AVE N STE 101
WORCESTER, MA 01605
Worcester County (508) 753-3220
FREDDY NANCY KAKPO PMHNP-BC
Nurse Practitioner (Psychiatric/Mental Health)
425 LAKE AVE N STE 101
WORCESTER, MA 01605
Worcester County (508) 753-3220
MARIANNE NOONAN R.N.
Registered Nurse
425 LAKE AVE N STE 101
WORCESTER, MA 01605
Worcester County (508) 753-3220
MS. CHRISTIAN ELIZABETH WILLIAMS LMHC
Counselor
425 LAKE AVE N STE 101
WORCESTER, MA 01605
Worcester County (087) 533-2205
PATRICIA M. SENIOR RNCS
Clinical Nurse Specialist (Psychiatric/Mental Health, Adult)
425 LAKE AVE N STE 101
WORCESTER, MA 01605
Worcester County (508) 753-3220
AHMED APPIAH DNP
Nurse Practitioner (Psychiatric/Mental Health)
425 LAKE AVE N STE 101
WORCESTER, MA 01605
Worcester County (508) 414-6856
MOHAMAD R. OCH M.D.
Psychiatry & Neurology (Psychiatry)
425 LAKE AVE N STE 101
WORCESTER, MA 01605
Worcester County (508) 753-3220
DR. KIMBERLY LOVETT M.D.
Psychiatry & Neurology (Psychiatry)
425 LAKE AVE N STE 101
WORCESTER, MA 01605
Worcester County (508) 753-3220

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 Niki Nguyen's NPI number?

The NPI number for Niki Nguyen is 1538919618. It was assigned to this individual provider in the NPPES registry on March 25, 2024.

Where is Niki Nguyen located?

Niki Nguyen practices at 425 Lake Ave N Ste 101, Worcester, MA 01605. The listed phone number is (508) 753-3220.

What is Niki Nguyen's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Is Niki Nguyen enrolled in Medicare?

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

Which organization bills Medicare for Niki Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Niki Nguyen reassigns Medicare benefits to Advanced Psych Services, LLC (Worcester, MA). 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 Niki Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Niki Nguyen accept?

Health plans from Harvard Pilgrim Health Care list Niki 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 Niki Nguyen was last updated on February 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.