DIANA ROSE DIEM
NPI 1003520917
Occupational Therapist in Selden, NY
About Diana Rose Diem NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DIANA ROSE DIEM (NPI 1003520917) is an individual occupational therapist in Selden, New York and active in the NPI registry since January 2023. She is a graduate of Other (2023).
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
Diana Rose Diem 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 Reassignments
2Medicare enrollment records show Diana Diem reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Coram, NY 11727
- Reassigned Medicare billing, New York enrollment
- 518 clinicians in this Medicare group
Great Neck, NY 11021
- Reassigned Medicare billing, New York enrollment
- 99 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.
Areas of Expertise CMS Part B claims 9
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 2
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 Diana Diem's NPI number?
The NPI number for Diana Diem is 1003520917. It was assigned to this individual provider in the NPPES registry on January 6, 2023.
Where is Diana Diem located?
Diana Diem practices at 764 Middle Country Rd, Selden, NY 11784. The listed phone number is (631) 760-7800.
What is Diana Diem's specialty?
The primary specialty registered for this NPI is Occupational Therapist with taxonomy code 225X00000X.
Is Diana Diem enrolled in Medicare?
Yes. Diana Diem 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 organizations bill Medicare for Diana Diem's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Diana Diem reassigns Medicare benefits to 2 organizations: Professional Occupational & Physical Therapy, PLLC (Coram, NY) and Reddy Care Physical And Occupational Therapy PLLC (Great Neck, NY). Each 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 Diana Diem'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 Diana Diem was last updated on October 20, 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.