MISS MARIA ELIZABETH MATTSON NP
NPI 1699451237
Nurse Practitioner - Adult Health in Bay Shore, NY
About Miss Maria Elizabeth Mattson Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MISS MARIA ELIZABETH MATTSON NP (NPI 1699451237) is an individual adult health provider in Bay Shore, New York, licensed in New York (F310944-01) and active in the NPI registry since June 2023. She is enrolled in Medicare PECOS, is affiliated with Ns/lij Hs Southside Hospital, and is a graduate of Other (2022).
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
Miss Maria Elizabeth Mattson Np 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 Maria Mattson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New Hyde Park, NY 11040
- Reassigned Medicare billing, New York enrollment
- 9,353 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 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, NYNorth Shore University Hospital
Acute Care Hospitals · Manhasset, NYLong Island Jewish Medical Center
Acute Care Hospitals · New Hyde Park, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11706 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 11
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BAY SHORE, NY 11706
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 Maria Mattson's NPI number?
The NPI number for Maria Mattson is 1699451237. It was assigned to this individual provider in the NPPES registry on June 27, 2023.
Where is Maria Mattson located?
Maria Mattson practices at 250 E Main St, Bay Shore, NY 11706. The listed phone number is (631) 390-7100.
What is Maria Mattson's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.
Is Maria Mattson enrolled in Medicare?
Yes. Maria Mattson 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 Maria Mattson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Maria Mattson reassigns Medicare benefits to North Shore - Lij Medical PC (New Hyde Park, NY). 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 Maria Mattson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Maria Mattson affiliated with any hospitals?
According to CMS data, Maria Mattson is affiliated with Ns/Lij Hs Southside Hospital, North Shore University Hospital and Long Island Jewish Medical Center.
When was this NPI record last updated?
The NPPES record for Maria Mattson was last updated on June 27, 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.
# Miss Maria Elizabeth Mattson, NP · NPI 1699451237
Adult Health physician in Bay Shore, New York. Individual provider, active in the CMS NPPES registry since June 27, 2023.
## Identity
- **NPI:** 1699451237 (Entity type: Individual)
- **Enumerated:** June 27, 2023
- **Primary specialty:** Nurse Practitioner - Adult Health · taxonomy 363LA2200X
- **State license:** F310944-01 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 250 E MAIN ST, Bay Shore, NY 11706-8442
- **Phone:** (631) 390-7100
## 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:** North Shore - Lij Medical PC (NPI 1790043479, New Hyde Park, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** June 27, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1699451237) · Data from the CMS NPPES public registry.