GREENLEAF NEUROLOGY, PLLC
NPI 1144017476
Clinic/Center in Haverhill, MA
About Greenleaf Neurology, Pllc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREENLEAF NEUROLOGY, PLLC (NPI 1144017476), doing business as Greenleaf Neurology, is a healthcare organization registered as a clinic/center in Haverhill, Massachusetts and active in the NPI registry since April 2025. The organization lists Alexandra Filippakis, Owner/neurologist, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Greenleaf Neurology, Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Greenleaf Neurology, PLLC, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Greenleaf Neurology, PLLC's NPI number?
The NPI number for Greenleaf Neurology, PLLC is 1144017476. It was assigned to this organization in the NPPES registry on April 21, 2025. The provider is doing business as Greenleaf Neurology.
Where is Greenleaf Neurology, PLLC located?
Greenleaf Neurology, PLLC is located at 2 Merrimack St Fl 3, Haverhill, MA 01830. The listed phone number is (978) 428-9220.
What is Greenleaf Neurology, PLLC's specialty?
The primary specialty registered for this NPI is Clinic/Center with taxonomy code 261Q00000X.
Is Greenleaf Neurology, PLLC enrolled in Medicare?
Yes. Greenleaf Neurology, PLLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Greenleaf Neurology, PLLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Neurology) reassigns their Medicare billing to Greenleaf Neurology, PLLC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Greenleaf Neurology, PLLC was last updated on April 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Greenleaf Neurology, Pllc · NPI 1144017476
Clinic/Center organization in Haverhill, Massachusetts. Organization record, active in the CMS NPPES registry since April 21, 2025.
## Identity
- **NPI:** 1144017476 (Entity type: Organization)
- **Enumerated:** April 21, 2025
- **Primary specialty:** Clinic/Center · taxonomy 261Q00000X
- **Also known as:** Greenleaf Neurology (Doing Business As)
- **Organization subpart:** No
- **Authorized official:** Alexandra Filippakis, OWNER/NEUROLOGIST
## Practice location
- **Address:** 2 MERRIMACK ST FL 3, Haverhill, MA 01830-6207
- **Phone:** (978) 428-9220
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Neurology) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 21, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1144017476) · Data from the CMS NPPES public registry.