MRS. MELISSA MARIE ESAU FNP-C
NPI 1861845521
Nurse Practitioner - Family in Acton, MA
About Mrs. Melissa Marie Esau Fnp-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. MELISSA MARIE ESAU FNP-C (NPI 1861845521) is an individual family provider in Acton, Massachusetts, licensed in Massachusetts (RN2285160) and active in the NPI registry since July 2016. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mrs. Melissa Marie Esau Fnp-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Melissa Esau reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Medway, MA 02053
- Reassigned Medicare billing, Massachusetts enrollment
- 185 clinicians in this Medicare group
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 01720 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Melissa Esau's NPI number?
The NPI number for Melissa Esau is 1861845521. It was assigned to this individual provider in the NPPES registry on July 18, 2016. The provider is also known as Melissa Marie Zaniewski.
Where is Melissa Esau located?
Melissa Esau practices at 344 Great Rd, Acton, MA 01720. The listed phone number is (978) 264-9130.
What is Melissa Esau's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Melissa Esau enrolled in Medicare?
Yes. Melissa Esau is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Melissa Esau's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Melissa Esau reassigns Medicare benefits to Minuteclinic Diagnostic Of Massachusetts LLC (Medway, 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 Melissa Esau'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 Melissa Esau was last updated on July 27, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Mrs. Melissa Marie Esau, FNP-C · NPI 1861845521
Family physician in Acton, Massachusetts. Individual provider, active in the CMS NPPES registry since July 18, 2016.
## Identity
- **NPI:** 1861845521 (Entity type: Individual)
- **Enumerated:** July 18, 2016
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** RN2285160 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 344 GREAT RD, Acton, MA 01720
- **Phone:** (978) 264-9130
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Minuteclinic Diagnostic Of Massachusetts LLC (NPI 1457470858, Medway, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 27, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1861845521) · Data from the CMS NPPES public registry.