STEPHEN CHRISTOPHER MARSHALL
NPI 1700590023
Nurse Practitioner - Psychiatric/Mental Health in Brookhaven, NY
About Stephen Christopher Marshall NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEPHEN CHRISTOPHER MARSHALL (NPI 1700590023) is an individual psychiatric/mental health provider in Brookhaven, New York, licensed in New York (F40445-01) and active in the NPI registry since January 2023. He is enrolled in Medicare PECOS and is a graduate of Other (2022).
NPPES Registry Identity
Specialties & Licenses
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
Stephen Christopher Marshall 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 Stephen Marshall reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New York, NY 10016
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Psychiatric Nurse Practitioner PC
- 63 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11719 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Stephen Marshall's NPI number?
The NPI number for Stephen Marshall is 1700590023. It was assigned to this individual provider in the NPPES registry on January 11, 2023.
Where is Stephen Marshall located?
Stephen Marshall practices at 9 Newey Ln, Brookhaven, NY 11719. The listed phone number is (631) 946-9800.
What is Stephen Marshall's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.
Is Stephen Marshall enrolled in Medicare?
Yes. Stephen Marshall 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 Stephen Marshall's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Marshall reassigns Medicare benefits to Psychiatric Nurse Practitioner P.C (New York, 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 Stephen Marshall's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Stephen Marshall accept?
Health plans from Oscar Health list Stephen Marshall 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.
When was this NPI record last updated?
The NPPES record for Stephen Marshall was last updated on January 11, 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.
# Stephen Christopher Marshall · NPI 1700590023
Psychiatric/Mental Health physician in Brookhaven, New York. Individual provider, active in the CMS NPPES registry since January 11, 2023.
## Identity
- **NPI:** 1700590023 (Entity type: Individual)
- **Enumerated:** January 11, 2023
- **Primary specialty:** Nurse Practitioner - Psychiatric/Mental Health · taxonomy 363LP0808X
- **State license:** F40445-01 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 9 NEWEY LN, Brookhaven, NY 11719-9634
- **Phone:** (631) 946-9800
## 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:** Psychiatric Nurse Practitioner P.C (NPI 1518595727, New York, 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:** January 11, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1700590023) · Data from the CMS NPPES public registry.