1. Home
  2. Directory
  3. Massachusetts
  4. Waltham
  5. Nurse Practitioner
  6. NPI Profile

ELENI MARIA KOUDANIS APRN
NPI 1700661253
Nurse Practitioner - Psychiatric/Mental Health in Waltham, MA

Active since August 31, 2023PECOS Enrolled
564 MAIN ST SUITE 100, WALTHAM, MA 02452(833) 287-7223 Get Directions Write a Review

NPPES record last updated: September 26, 2025. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Eleni Maria Koudanis Aprn NPPES

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

ELENI MARIA KOUDANIS APRN (NPI 1700661253) is an individual psychiatric/mental health provider in Waltham, Massachusetts, licensed in Massachusetts (RN2383782) and active in the NPI registry since August 2023. She is enrolled in Medicare PECOS and is a graduate of Other (2025).

NPPES Registry Identity

NPI1700661253
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameELENI MARIA KOUDANISCredential: APRN
Location Address564 MAIN ST SUITE 100Waltham, MA 02452-5559
Mailing Address564 Main St Suite 100Waltham, MA 02452-5552
Phone(833) 287-7223
Sole ProprietorNo
Medical School CMSOtherGraduated 2025
Enumeration DateAugust 31, 2023
Last NPPES UpdateSeptember 26, 2025
NPPES CertifiedSeptember 26, 2025
✔ NPI 1700661253 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 · RN2383782
564 MAIN ST SUITE 100, Waltham, MA 02452
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)

Eleni Maria Koudanis Aprn is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2860832375
PECOS Enrollment IDI20260602002024
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 Eleni Koudanis reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Jal Practice
9.9 mi
Emergency Medicine
800 W CUMMINGS PARK STE 6250
Woburn, MA 01801
  • Reassigned Medicare billing, Massachusetts enrollment
  • 11 clinicians in this Medicare group
NPI 1730802687 (617) 569-2112

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 02452 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.

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 Eleni Koudanis's NPI number?

The NPI number for Eleni Koudanis is 1700661253. It was assigned to this individual provider in the NPPES registry on August 31, 2023.

Where is Eleni Koudanis located?

Eleni Koudanis practices at 564 Main St Suite 100, Waltham, MA 02452. The listed phone number is (833) 287-7223.

What is Eleni Koudanis's specialty?

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

Is Eleni Koudanis enrolled in Medicare?

Yes. Eleni Koudanis is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Eleni Koudanis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Eleni Koudanis reassigns Medicare benefits to Jal Practice (Woburn, 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 Eleni Koudanis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Eleni Koudanis accept?

Health plans from Harvard Pilgrim Health Care list Eleni Koudanis 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 Eleni Koudanis was last updated on September 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.