DIANA HASSAN MS OTR/L
NPI 1699152322
Occupational Therapist in New York, NY
About Diana Hassan Ms Otr/l NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DIANA HASSAN MS OTR/L (NPI 1699152322) is an individual occupational therapist in New York, New York, licensed in New York (019652-1) and active in the NPI registry since May 2015.
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 (PECOS)
Diana Hassan Ms Otr/l is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Diana Hassan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New York, NY 10038
- Reassigned Medicare billing, New York enrollment
- 24 clinicians in this Medicare group
Baldwin, NY 11510
- Reassigned Medicare billing, New York enrollment
- 52 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.
Other Providers at the Same Location NPPES 20
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 Hassan's NPI number?
The NPI number for Diana Hassan is 1699152322. It was assigned to this individual provider in the NPPES registry on May 1, 2015.
Where is Diana Hassan located?
Diana Hassan practices at 675 3rd Ave, New York, NY 10017. The listed phone number is (212) 922-1001.
What is Diana Hassan's specialty?
The primary specialty registered for this NPI is Occupational Therapist with taxonomy code 225X00000X.
Is Diana Hassan enrolled in Medicare?
Yes. Diana Hassan is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Diana Hassan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Diana Hassan reassigns Medicare benefits to 2 organizations: Adapt Medical Professional Services (New York, NY) and Essential Ot, Pt, Slp & Psychology Services, PLLC (Baldwin, 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 Hassan'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 Hassan was last updated on July 8, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.