MS. SUSAN M TREES PMHNP
NPI 1912219841
Nurse Practitioner - Psychiatric/Mental Health in Central Islip, NY
About Ms. Susan M Trees Pmhnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. SUSAN M TREES PMHNP (NPI 1912219841) is an individual psychiatric/mental health provider in Central Islip, New York, licensed in New York (402351) and active in the NPI registry since July 2010. She is enrolled in Medicare PECOS and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
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
Ms. Susan M Trees Pmhnp 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
4Medicare enrollment records show Susan Trees reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Central Islip, NY 11722
- Reassigned Medicare billing, New York enrollment
- 70 clinicians in this Medicare group
Riverhead, NY 11901
- Reassigned Medicare billing, New York enrollment
- 11 clinicians in this Medicare group
Bronx, NY 10452
- Reassigned Medicare billing, New York enrollment
- 683 clinicians in this Medicare group
Valley Cottage, NY 10989
- Reassigned Medicare billing, New York enrollment
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 4
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11722 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.
CENTRAL ISLIP, NY 11722
CENTRAL ISLIP, NY 11722
CENTRAL ISLIP, NY 11722
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 Susan Trees's NPI number?
The NPI number for Susan Trees is 1912219841. It was assigned to this individual provider in the NPPES registry on July 8, 2010.
Where is Susan Trees located?
Susan Trees practices at 159 Carleton Ave, Central Islip, NY 11722. The listed phone number is (631) 650-2510.
What is Susan Trees's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.
Is Susan Trees enrolled in Medicare?
Yes. Susan Trees 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 Susan Trees's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Susan Trees reassigns Medicare benefits to 4 organizations: Long Island Select Healthcare, Inc. (Central Islip, NY), Aid To The Developmentally Disabled, Inc (Riverhead, NY), Sun River Health Inc (Bronx, NY) and Operation Engage Inc (Valley Cottage, 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 Susan Trees's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Susan Trees was last updated on May 16, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Ms. Susan M Trees, PMHNP · NPI 1912219841
Psychiatric/Mental Health physician in Central Islip, New York. Individual provider, active in the CMS NPPES registry since July 8, 2010.
## Identity
- **NPI:** 1912219841 (Entity type: Individual)
- **Enumerated:** July 8, 2010
- **Primary specialty:** Nurse Practitioner - Psychiatric/Mental Health · taxonomy 363LP0808X
- **State license:** 402351 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 159 CARLETON AVE, Central Islip, NY 11722
- **Phone:** (631) 650-2510
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Long Island Select Healthcare, Inc. (NPI 1043663107, Central Islip, NY); Aid To The Developmentally Disabled, Inc (NPI 1912575762, Riverhead, NY); Sun River Health Inc (NPI 1740763275, Bronx, NY); Operation Engage Inc (NPI 1831802909, Valley Cottage, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** May 16, 2019
- **Other identifiers:** Other 402351 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1912219841) · Data from the CMS NPPES public registry.