MICHAEL KENNETH MASSERIA CRNA
NPI 1811454051
Nurse Anesthetist, Certified Registered in Stony Brook, NY
About Michael Kenneth Masseria Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHAEL KENNETH MASSERIA CRNA (NPI 1811454051) is an individual nurse anesthetist, certified registered in Stony Brook, New York, licensed in New York (686773) and active in the NPI registry since February 2019. He is affiliated with Ns/lij Hs Southside Hospital and is a graduate of University Of Missouri, Columbia School Of Medicine (2019).
NPPES Registry Identity
Specialties & Licenses 2
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
Michael Kenneth Masseria 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
8Medicare enrollment records show Michael Masseria reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Port Jefferson Station, NY 11776
- Reassigned Medicare billing, New York enrollment
- 63 clinicians in this Medicare group
Smithtown, NY 11787
- Reassigned Medicare billing, New York enrollment
- 92 clinicians in this Medicare group
Smithtown, NY 11787
- Reassigned Medicare billing, New York enrollment
- 101 clinicians in this Medicare group
Rocky Point, NY 11778
- Reassigned Medicare billing, New York enrollment
- 233 clinicians in this Medicare group
West Islip, NY 11795
- Reassigned Medicare billing, New York enrollment
- 67 clinicians in this Medicare group
Chappaqua, NY 10514
- Reassigned Medicare billing, New York enrollment
- 1,406 clinicians in this Medicare group
Rego Park, NY 11374
- Reassigned Medicare billing, New York enrollment
- 1,074 clinicians in this Medicare group
New York, NY 10029
- Reassigned Medicare billing, New York enrollment
- 245 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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ns/Lij Hs Southside Hospital
Acute Care Hospitals · Bay Shore, NYLong Island Community Hospital
Acute Care Hospitals · Patchogue, NYMount Sinai South Nassau
Acute Care Hospitals · Oceanside, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11794 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 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
STONY BROOK, NY 11794
STONY BROOK, NY 11794
STONY BROOK, NY 11794
STONY BROOK, NY 11794
STONY BROOK, NY 11794
STONY BROOK, NY 11794
STONY BROOK, NY 11794
STONY BROOK, NY 11794
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 Michael Masseria's NPI number?
The NPI number for Michael Masseria is 1811454051. It was assigned to this individual provider in the NPPES registry on February 25, 2019.
Where is Michael Masseria located?
Michael Masseria practices at Stony Brook University Medical Center Hsc Level 4 - Room 060, Stony Brook, NY 11794. The listed phone number is (631) 444-2975.
What is Michael Masseria's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Michael Masseria enrolled in Medicare?
Yes. Michael Masseria 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 Michael Masseria's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Masseria reassigns Medicare benefits to 8 organizations: Long Island Digestive Endoscopy Center, LLC (Port Jefferson Station, NY), Office Based Anesthesia LLC (Smithtown, NY), Suffolk Anesthesiology Associates, PC (Smithtown, NY), Long Island Anesthesia Physicians LLP (Rocky Point, NY), Long Island Anesthesiologists, PLLC (West Islip, NY) and 3 more organizations, 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 Michael Masseria's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Masseria accept?
Health plans from Oscar Health and Oscar Insurance Company list Michael Masseria 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 Michael Masseria affiliated with any hospitals?
According to CMS data, Michael Masseria is affiliated with Ns/Lij Hs Southside Hospital, Long Island Community Hospital and Mount Sinai South Nassau.
When was this NPI record last updated?
The NPPES record for Michael Masseria was last updated on March 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Michael Kenneth Masseria, CRNA · NPI 1811454051
Nurse Anesthetist, Certified Registered physician in Stony Brook, New York. Individual provider, active in the CMS NPPES registry since February 25, 2019.
## Identity
- **NPI:** 1811454051 (Entity type: Individual)
- **Enumerated:** February 25, 2019
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 686773 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** STONY BROOK UNIVERSITY MEDICAL CENTER, HSC LEVEL 4 - ROOM 060, Stony Brook, NY 11794-8480
- **Phone:** (631) 444-2975
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 8 organizations under Medicare reassignment (form CMS-855R): Long Island Digestive Endoscopy Center, LLC (NPI 1235551052, Port Jefferson Station, NY); Office Based Anesthesia LLC (NPI 1407947617, Smithtown, NY); Suffolk Anesthesiology Associates, PC (NPI 1194826420, Smithtown, NY); Long Island Anesthesia Physicians LLP (NPI 1952387276, Rocky Point, NY); Long Island Anesthesiologists, PLLC (NPI 1528161171, West Islip, NY); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Missouri, Columbia School Of Medicine, class of 2019
## Record status
- **NPPES last updated:** March 12, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1811454051) · Data from the CMS NPPES public registry.