MARISA GREAVES
NPI 1457863672
Social Worker - Clinical in Haverhill, MA
About Marisa Greaves NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARISA GREAVES (NPI 1457863672) is an individual clinical provider in Haverhill, Massachusetts, licensed in Massachusetts (LICSW126363) and active in the NPI registry since October 2017. She is enrolled in Medicare PECOS, maintains a secondary practice location in Wellesley, and is a graduate of Other (2019).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
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
Marisa Greaves 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.
Medicare Billing Reassignment
Medicare enrollment records show Marisa Greaves reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Wellesley, MA 02481
- Reassigned Medicare billing, Massachusetts enrollment
- 41 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 01830 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 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
HAVERHILL, MA 01830
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 Marisa Greaves's NPI number?
The NPI number for Marisa Greaves is 1457863672. It was assigned to this individual provider in the NPPES registry on October 27, 2017.
Where is Marisa Greaves located?
Marisa Greaves practices at 108 Merrimack St, Haverhill, MA 01830. The listed phone number is (833) 510-4357.
What is Marisa Greaves's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Marisa Greaves enrolled in Medicare?
Yes. Marisa Greaves 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 Marisa Greaves's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marisa Greaves reassigns Medicare benefits to Colony Care Inc (Wellesley, 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 Marisa Greaves's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marisa Greaves accept?
Health plans from Harvard Pilgrim Health Care list Marisa Greaves 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 Marisa Greaves was last updated on October 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Marisa Greaves · NPI 1457863672
Clinical provider in Haverhill, Massachusetts. Individual provider, active in the CMS NPPES registry since October 27, 2017.
## Identity
- **NPI:** 1457863672 (Entity type: Individual)
- **Enumerated:** October 27, 2017
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **State license:** LICSW126363 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 108 MERRIMACK ST, Haverhill, MA 01830-5210
- **Phone:** (833) 510-4357 · **Fax:** (866) 460-2997
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Colony Care Inc (NPI 1720053408, Wellesley, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** October 6, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1457863672) · Data from the CMS NPPES public registry.