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MARGARET W NJIGUA
NPI 1487471843
Registered Nurse - Psychiatric/Mental Health in Lexington, MA

Active since September 25, 2024PECOS EnrolledAccepts Medicare Assignment
125 HARTWELL AVE, LEXINGTON, MA 02421(781) 861-0890 Get Directions Write a Review

NPPES record last updated: September 25, 2024. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Margaret W Njigua NPPES

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

MARGARET W NJIGUA (NPI 1487471843) is an individual psychiatric/mental health provider in Lexington, Massachusetts, licensed in Massachusetts (RN2314786) and active in the NPI registry since September 2024. She is enrolled in Medicare PECOS and is a graduate of Other (2025).

NPPES Registry Identity

NPI1487471843
Entity TypeIndividualFemale
Primary Taxonomy163WP0808X
Provider Legal NameMARGARET W NJIGUA
Location Address125 HARTWELL AVELexington, MA 02421-3100
Mailing Address125 Hartwell AveLexington, MA 02421-3100 · (781) 861-0890
Phone(781) 861-0890
Sole ProprietorYes
Medical School CMSOtherGraduated 2025
Enumeration DateSeptember 25, 2024
NPPES CertifiedSeptember 25, 2024
✔ NPI 1487471843 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRegistered Nurse · Psychiatric/Mental HealthNursing Service Providers
Taxonomy Code163WP0808X
License✔ Licensed in MA · RN2314786
125 HARTWELL AVE, Lexington, MA 02421
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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 and accepts Medicare assignment

Margaret W Njigua 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 ID9335621390
PECOS Enrollment IDI20260307000066
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 Margaret Njigua reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Eliot Community Human Services
Same address
Mental Health (Including Community Mental Health Center)
125 HARTWELL AVE
Lexington, MA 02421
  • Reassigned Medicare billing, Massachusetts enrollment
  • 167 clinicians in this Medicare group
NPI 1679648182 (978) 369-1113

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

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

ANGELIKI CONSTANTINE
Counselor (Mental Health)
125 HARTWELL AVE
LEXINGTON, MA 02421
Middlesex County (781) 861-0890
EMMA CLAY RN
Nurse Practitioner (Psychiatric/Mental Health)
125 HARTWELL AVE
LEXINGTON, MA 02421
Middlesex County (781) 861-0890
KATE MCGRATH
Counselor (Mental Health)
125 HARTWELL AVE
LEXINGTON, MA 02421
Middlesex County (781) 861-0890
SARAH ALISON VALENTINE
Community Health Worker
125 HARTWELL AVE
LEXINGTON, MA 02421
Middlesex County (781) 861-0890
MADELINE ELIZABETH ELLIS
Counselor (Mental Health)
125 HARTWELL AVE
LEXINGTON, MA 02421
Middlesex County (781) 861-0890
GRACE WILLINGHAM
Counselor (Mental Health)
125 HARTWELL AVE
LEXINGTON, MA 02421
Middlesex County (781) 861-0890
MADLYNA BOUCHOTTE
Counselor (Mental Health)
125 HARTWELL AVE
LEXINGTON, MA 02421
Middlesex County (781) 861-0890
YALIA JOYNER
Counselor (Mental Health)
125 HARTWELL AVE
LEXINGTON, MA 02421
Middlesex County (781) 861-0890

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 Margaret Njigua's NPI number?

The NPI number for Margaret Njigua is 1487471843. It was assigned to this individual provider in the NPPES registry on September 25, 2024.

Where is Margaret Njigua located?

Margaret Njigua practices at 125 Hartwell Ave, Lexington, MA 02421. The listed phone number is (781) 861-0890.

What is Margaret Njigua's specialty?

The primary specialty registered for this NPI is Registered Nurse, specializing in Psychiatric/Mental Health, with taxonomy code 163WP0808X.

Is Margaret Njigua enrolled in Medicare?

Yes. Margaret Njigua 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.

Which organization bills Medicare for Margaret Njigua's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Njigua reassigns Medicare benefits to Eliot Community Human Services (Lexington, 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 Margaret Njigua'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 Margaret Njigua was last updated on September 25, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.