DR. GREER GRIERSON MELIDONIS
NPI 1235240607
Psychologist in Hillsborough, NJ
About Dr. Greer Grierson Melidonis NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GREER GRIERSON MELIDONIS (NPI 1235240607) is an individual psychologist in Hillsborough, New Jersey, licensed in New Jersey (SI03317) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1993).
NPPES Registry Identity
Specialties & Licenses
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
Dr. Greer Grierson Melidonis 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 Greer Melidonis reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Hillsborough, NJ 08844
- Reassigned Medicare billing, New Jersey 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
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.
Other Providers at the Same Location NPPES 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
HILLSBOROUGH, NJ 08844
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 Greer Melidonis's NPI number?
The NPI number for Greer Melidonis is 1235240607. It was assigned to this individual provider in the NPPES registry on August 31, 2006.
Where is Greer Melidonis located?
Greer Melidonis practices at 105 Omni Dr Center For Collaborative Psychology, Hillsborough, NJ 08844. The listed phone number is (908) 359-2466.
What is Greer Melidonis's specialty?
The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.
Is Greer Melidonis enrolled in Medicare?
Yes. Greer Melidonis 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 Greer Melidonis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Greer Melidonis reassigns Medicare benefits to Greer G. Melidonis Psy.D. LLC (Hillsborough, NJ). 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 Greer Melidonis'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 Greer Melidonis was last updated on July 16, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.