LARISSA MATTEI MD
NPI 1942730817
Obstetrics & Gynecology - Gynecologic Oncology in Worcester, MA
About Larissa Mattei Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LARISSA MATTEI MD (NPI 1942730817) is an individual gynecologic oncology provider in Worcester, Massachusetts, licensed in Massachusetts (1020114) and active in the NPI registry since June 2017. She is enrolled in Medicare PECOS, is affiliated with Umass Memorial Healthalliance Hospitals, and is a graduate of Tufts University School Of Medicine (2017).
NPPES Registry Identity
Specialties & Licenses
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
Larissa Mattei Md 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 Larissa Mattei reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Worcester, MA 01655
- Reassigned Medicare billing, Massachusetts enrollment
- 2,902 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.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Umass Memorial Healthalliance Hospitals
Acute Care Hospitals · Leominster, MAUmass Memorial Health - Harrington Hospital
Acute Care Hospitals · Southbridge, MAUmass Memorial Medical Center/University Campus
Acute Care Hospitals · Worcester, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01605 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WORCESTER, MA 01605
WORCESTER, MA 01605
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 Larissa Mattei's NPI number?
The NPI number for Larissa Mattei is 1942730817. It was assigned to this individual provider in the NPPES registry on June 14, 2017.
Where is Larissa Mattei located?
Larissa Mattei practices at 33 Kendall St, Worcester, MA 01605. The listed phone number is (508) 334-1160.
What is Larissa Mattei's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecologic Oncology, with taxonomy code 207VX0201X.
Is Larissa Mattei enrolled in Medicare?
Yes. Larissa Mattei 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 Larissa Mattei's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Larissa Mattei reassigns Medicare benefits to Umass Memorial Medical Group Inc (Worcester, 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 Larissa Mattei's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Larissa Mattei affiliated with any hospitals?
According to CMS data, Larissa Mattei is affiliated with Umass Memorial Healthalliance Hospitals, Umass Memorial Health - Harrington Hospital and Umass Memorial Medical Center/University Campus.
When was this NPI record last updated?
The NPPES record for Larissa Mattei was last updated on August 12, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Larissa Mattei, MD · NPI 1942730817
Gynecologic Oncology physician in Worcester, Massachusetts. Individual provider, active in the CMS NPPES registry since June 14, 2017.
## Identity
- **NPI:** 1942730817 (Entity type: Individual)
- **Enumerated:** June 14, 2017
- **Primary specialty:** Obstetrics & Gynecology - Gynecologic Oncology · taxonomy 207VX0201X
- **State license:** 1020114 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 33 KENDALL ST, Worcester, MA 01605-2726
- **Phone:** (508) 334-1160
## 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:** Umass Memorial Medical Group Inc (NPI 1760445373, Worcester, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Tufts University School Of Medicine, class of 2017
## Record status
- **NPPES last updated:** August 12, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1942730817) · Data from the CMS NPPES public registry.