MARISSA GRIECCI CRNA
NPI 1992020952
Nurse Anesthetist, Certified Registered in Boston, MA
About Marissa Griecci Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARISSA GRIECCI CRNA (NPI 1992020952) is an individual nurse anesthetist, certified registered in Boston, Massachusetts, licensed in Massachusetts (RN278215) and active in the NPI registry since April 2010. She is enrolled in Medicare PECOS, is affiliated with North Shore Medical Center -, and is a graduate of Other (2010).
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
Marissa Griecci Crna 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 Reassignments
6Medicare enrollment records show Marissa Griecci reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Stoneham, MA 02180
- Reassigned Medicare billing, Massachusetts enrollment
- 65 clinicians in this Medicare group
Lowell, MA 01851
- Reassigned Medicare billing, Massachusetts enrollment
- 60 clinicians in this Medicare group
Chelmsford, MA 01824
- Reassigned Medicare billing, Massachusetts enrollment
- 26 clinicians in this Medicare group
Salem, NH 03079
- Reassigned Medicare billing, Massachusetts enrollment
- 181 clinicians in this Medicare group
Portsmouth, NH 03801
- Reassigned Medicare billing, New Hampshire enrollment
- 58 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 2
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
North Shore Medical Center -
Acute Care Hospitals · Salem, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02114 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.
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
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 Marissa Griecci's NPI number?
The NPI number for Marissa Griecci is 1992020952. It was assigned to this individual provider in the NPPES registry on April 2, 2010.
Where is Marissa Griecci located?
Marissa Griecci practices at 55 Fruit St, Boston, MA 02114. The listed phone number is (617) 726-2000.
What is Marissa Griecci's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Marissa Griecci enrolled in Medicare?
Yes. Marissa Griecci 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 organizations bill Medicare for Marissa Griecci's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marissa Griecci reassigns Medicare benefits to 6 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), Dha Endoscopy LLC (Stoneham, MA), Lowell Anesthesia Associates PLLC (Lowell, MA), Digestive Health Specialists, P.C. (Chelmsford, MA), Mass General Brigham Medical Group, Inc. (Salem, NH) and 1 more organization, listed in the Medicare section above. Each 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 Marissa Griecci's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Marissa Griecci affiliated with any hospitals?
According to CMS data, Marissa Griecci is affiliated with North Shore Medical Center -.
When was this NPI record last updated?
The NPPES record for Marissa Griecci was last updated on April 17, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Marissa Griecci, CRNA · NPI 1992020952
Nurse Anesthetist, Certified Registered physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since April 2, 2010.
## Identity
- **NPI:** 1992020952 (Entity type: Individual)
- **Enumerated:** April 2, 2010
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** RN278215 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FRUIT ST, Boston, MA 02114-2621
- **Phone:** (617) 726-2000 · **Fax:** (617) 643-7972
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); Dha Endoscopy LLC (NPI 1851921555, Stoneham, MA); Lowell Anesthesia Associates PLLC (NPI 1063938934, Lowell, MA); Digestive Health Specialists, P.C. (NPI 1205895257, Chelmsford, MA); Mass General Brigham Medical Group, Inc. (NPI 1083360200, Salem, NH); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2010
## Record status
- **NPPES last updated:** April 17, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1992020952) · Data from the CMS NPPES public registry.