CLAIRE RUTH TREFETHEN OTD
NPI 1740950138
Occupational Therapist in Brooklyn, NY
About Claire Ruth Trefethen Otd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CLAIRE RUTH TREFETHEN OTD (NPI 1740950138) is an individual occupational therapist in Brooklyn, New York, licensed in New York (027577) and active in the NPI registry since September 2021. She maintains a secondary practice location in Tempe and is a graduate of Other (2021).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Location 1
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
Claire Ruth Trefethen Otd 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
3Medicare enrollment records show Claire Trefethen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New York, NY 10003
- Reassigned Medicare billing, New York enrollment
- 9 clinicians in this Medicare group
New York, NY 10022
- Reassigned Medicare billing, New York enrollment
- 706 clinicians in this Medicare group
New York, NY 10128
- Reassigned Medicare billing, New York enrollment
- 564 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 6
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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BROOKLYN, NY 11201
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 Claire Trefethen's NPI number?
The NPI number for Claire Trefethen is 1740950138. It was assigned to this individual provider in the NPPES registry on September 16, 2021. The provider is also known as Claire Katherine Ruth Otd.
Where is Claire Trefethen located?
Claire Trefethen practices at 41 Clark St, Brooklyn, NY 11201. The listed phone number is (646) 518-5566.
What is Claire Trefethen's specialty?
The primary specialty registered for this NPI is Occupational Therapist with taxonomy code 225X00000X.
Is Claire Trefethen enrolled in Medicare?
Yes. Claire Trefethen 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 Claire Trefethen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Claire Trefethen reassigns Medicare benefits to 3 organizations: Lisa Blum Physical Therapy PLLC (New York, NY), Spear Physical And Occupational Therapy, LLC (New York, NY) and Fox Rehabilitation Physical Therapy Services LLC (New York, 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 Claire Trefethen'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 Claire Trefethen was last updated on April 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 months 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.