DR. MARISA DANA HAMMOCK PSY.D
NPI 1164701199
Psychologist in West Islip, NY

Active since August 09, 2011PECOS Enrolled
203 TAHLULAH LN, WEST ISLIP, NY 11795(516) 241-4693 Get Directions Write a Review

NPPES record last updated: August 9, 2011. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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

NPI1164701199
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameDR. MARISA DANA HAMMOCKCredential: PSY.D
Location Address203 TAHLULAH LNWest Islip, NY 11795-4611
Mailing Address203 Tahlulah LnWest Islip, NY 11795-4611 · (516) 241-4693
Sole ProprietorYes
Enumeration DateAugust 9, 2011
✔ NPI 1164701199 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in NY · 019131
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
203 TAHLULAH LN, West Islip, NY 11795

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).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

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.

Psychologist
34 SOUTH BROADWAY SUITE 600, AGING MATTERS PSYCHOLOGICAL SERVICES, PC
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.