MARIANNA HACKER NP
NPI 1689395477
Nurse Practitioner - Adult Health in Smithtown, NY
About Marianna Hacker Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARIANNA HACKER NP (NPI 1689395477) is an individual adult health provider in Smithtown, New York, licensed in New York (310892) and active in the NPI registry since September 2022. She is enrolled in Medicare PECOS, is affiliated with St Catherine Of Siena Hospital Medical Center, 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
Marianna Hacker 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 Reassignments
3Medicare enrollment records show Marianna Hacker reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Smithtown, NY 11787
- Reassigned Medicare billing, New York enrollment
- 194 clinicians in this Medicare group
West Islip, NY 11795
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Samaritan Medical Services PC
- 209 clinicians in this Medicare group
Mount Kisco, NY 10549
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Optum Medical Care PC
- 1,601 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 5
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.
St Catherine Of Siena Hospital Medical Center
Acute Care Hospitals · Smithtown, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11787 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 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SMITHTOWN, NY 11787
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 Marianna Hacker's NPI number?
The NPI number for Marianna Hacker is 1689395477. It was assigned to this individual provider in the NPPES registry on September 8, 2022.
Where is Marianna Hacker located?
Marianna Hacker practices at 50 Ny-25a, Smithtown, NY 11787. The listed phone number is (631) 784-7200.
What is Marianna Hacker's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.
Is Marianna Hacker enrolled in Medicare?
Yes. Marianna Hacker 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 Marianna Hacker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marianna Hacker reassigns Medicare benefits to 3 organizations: St. Catherine Of Siena Medical Center (Smithtown, NY), Samaritan Medical Services, P.C. (West Islip, NY) and Optum Medical Care, P.C. (Mount Kisco, NY). 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 Marianna Hacker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Marianna Hacker affiliated with any hospitals?
According to CMS data, Marianna Hacker is affiliated with St Catherine Of Siena Hospital Medical Center.
When was this NPI record last updated?
The NPPES record for Marianna Hacker was last updated on November 22, 2022. 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.
# Marianna Hacker, NP · NPI 1689395477
Adult Health physician in Smithtown, New York. Individual provider, active in the CMS NPPES registry since September 8, 2022.
## Identity
- **NPI:** 1689395477 (Entity type: Individual)
- **Enumerated:** September 8, 2022
- **Primary specialty:** Nurse Practitioner - Adult Health · taxonomy 363LA2200X
- **State license:** 310892 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 50 NY-25A, Smithtown, NY 11787-3448
- **Phone:** (631) 784-7200
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): St. Catherine Of Siena Medical Center (NPI 1154764819, Smithtown, NY); Samaritan Medical Services, P.C. (NPI 1124184544, West Islip, NY); Optum Medical Care, P.C. (NPI 1982643003, Mount Kisco, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** November 22, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1689395477) · Data from the CMS NPPES public registry.