DR. MARISA DANA HAMMOCK PSY.D
NPI 1164701199
Psychologist in West Islip, NY
About Dr. Marisa Dana Hammock Psy.d NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARISA DANA HAMMOCK PSY.D (NPI 1164701199) is an individual psychologist in West Islip, New York, licensed in New York (019131) and active in the NPI registry since August 2011. She is enrolled in Medicare PECOS.
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 (PECOS)
Dr. Marisa Dana Hammock Psy.d is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Marisa Hammock reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
White Plains, NY 10601
- Reassigned Medicare billing, New York enrollment
- 8 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.
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 Marisa Hammock's NPI number?
The NPI number for Marisa Hammock is 1164701199. It was assigned to this individual provider in the NPPES registry on August 9, 2011.
Where is Marisa Hammock located?
Marisa Hammock practices at 203 Tahlulah Ln, West Islip, NY 11795. The listed phone number is (516) 241-4693.
What is Marisa Hammock's specialty?
The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.
Is Marisa Hammock enrolled in Medicare?
Yes. Marisa Hammock is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Marisa Hammock's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marisa Hammock reassigns Medicare benefits to Aging Matters Psychological Services, PC (White Plains, 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 Marisa Hammock's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marisa Hammock accept?
Health plans from Oscar Health list Marisa Hammock 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 Marisa Hammock was last updated on August 9, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.