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EMMA CLAY RN
NPI 1003598202
Nurse Practitioner - Psychiatric/Mental Health in Lexington, MA

Active since August 07, 2023PECOS Enrolled
125 HARTWELL AVE, LEXINGTON, MA 02421(781) 861-0890(781) 592-0581 Get Directions Write a Review

NPPES record last updated: May 5, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 5, 2026, Sep 23, 2024, Aug 15, 2024 and 2 more (5 updates tracked since 2023).

About Emma Clay Rn NPPES

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

EMMA CLAY RN (NPI 1003598202) is an individual psychiatric/mental health provider in Lexington, Massachusetts, licensed in Massachusetts (RN2339390) and active in the NPI registry since August 2023. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1003598202
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameEMMA CLAYCredential: RN
Location Address125 HARTWELL AVELexington, MA 02421-3100
Mailing Address177 Huntington AveBoston, MA 02115-3134 · (617) 286-4365
Phone(781) 861-0890
Fax(781) 592-0581
Sole ProprietorYes
Enumeration DateAugust 7, 2023
Last NPPES UpdateMay 5, 20265 updates tracked since enumeration
NPPES CertifiedMay 5, 2026
✔ NPI 1003598202 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in MA · RN2339390
Also ListedCounselor · Mental HealthTaxonomy 101YM0800X
125 HARTWELL AVE, Lexington, MA 02421
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, 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)

Emma Clay Rn 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 Emma Clay 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02421 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
$97.64 typical visit price
range $63.72 – $189.86
Typical copayment $24.41 (range $15.93 – $47.46)
Most-billed visit code 99203
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
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 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
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
OLIVIA BEANE LCSW
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 Emma Clay's NPI number?

The NPI number for Emma Clay is 1003598202. It was assigned to this individual provider in the NPPES registry on August 7, 2023.

Where is Emma Clay located?

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

What is Emma Clay's specialty?

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

Is Emma Clay enrolled in Medicare?

Yes. Emma Clay is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Emma Clay's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Emma Clay 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 Emma Clay's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Emma Clay accept?

Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Emma Clay 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 Emma Clay was last updated on May 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.