Provider Profile
Marissa Fielstein, LMSW
Unclaimed ProfileAbout Marissa Fielstein
Listed in the NPI registry as a social worker, Marissa Fielstein, LMSW practices in Northport, NY. NPI 1619383668 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (631) 261-4400
- Email not available
Practice Locations
79 MIDDLEVILLE RD
Northport, NY 11768
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other social workers at this location 3
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Common questions
What is Marissa Fielstein's specialty?
Marissa Fielstein is a social worker in Northport, NY. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Marissa Fielstein?
Marissa Fielstein is listed at 79 Middleville Rd, Northport, NY 11768. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Marissa Fielstein?
The number on file is (631) 261-4400. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Marissa Fielstein's NPI number?
Marissa Fielstein's National Provider Identifier is 1619383668. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How long has Marissa Fielstein been practicing?
Marissa Fielstein has 12+ years experience. Registered with an NPI since 2014. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
Has Marissa Fielstein confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Marissa Fielstein. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.