MELISSA M. ETHIER M.D.
NPI 1255396727
Obstetrics & Gynecology in Cambridge, MA
About Melissa M. Ethier M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MELISSA M. ETHIER M.D. (NPI 1255396727) is an individual obstetrics & gynecology provider in Cambridge, Massachusetts, licensed in Massachusetts (256992) and active in the NPI registry since April 2006. She is enrolled in Medicare PECOS, is affiliated with Cambridge Health Alliance, and maintains a secondary practice location in Portsmouth.
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
Melissa M. Ethier M.d. 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 Melissa Ethier reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Cambridge, MA 02139
- Reassigned Medicare billing, Massachusetts enrollment
- 719 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Cambridge Health Alliance
Acute Care Hospitals · Cambridge, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02139 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
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 Ethier's NPI number?
The NPI number for Melissa Ethier is 1255396727. It was assigned to this individual provider in the NPPES registry on April 19, 2006.
Where is Melissa Ethier located?
Melissa Ethier practices at 1493 Cambridge St, Cambridge, MA 02139. The listed phone number is (617) 498-1660.
What is Melissa Ethier's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Melissa Ethier enrolled in Medicare?
Yes. Melissa Ethier 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 Melissa Ethier's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Melissa Ethier reassigns Medicare benefits to Cambridge Public Health Commission (Cambridge, 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 Ethier's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Melissa Ethier accept?
Health plans from Anthem Blue Cross and Blue Shield list Melissa Ethier 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.
Is Melissa Ethier affiliated with any hospitals?
According to CMS data, Melissa Ethier is affiliated with Cambridge Health Alliance.
When was this NPI record last updated?
The NPPES record for Melissa Ethier was last updated on March 17, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Melissa M. Ethier, M.D. · NPI 1255396727
Obstetrics & Gynecology physician in Cambridge, Massachusetts. Individual provider, active in the CMS NPPES registry since April 19, 2006.
## Identity
- **NPI:** 1255396727 (Entity type: Individual)
- **Enumerated:** April 19, 2006
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 256992 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 1493 CAMBRIDGE ST, Cambridge, MA 02139-1047
- **Phone:** (617) 498-1660
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Cambridge Public Health Commission (NPI 1487603585, Cambridge, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Alabama School Of Medicine, class of 1990
## Record status
- **NPPES last updated:** March 17, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1255396727) · Data from the CMS NPPES public registry.