RUTHEE-LU BAYER MD
NPI 1215082961
Internal Medicine - Hematology & Oncology in Lake Success, NY
About Ruthee-lu Bayer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RUTHEE-LU BAYER MD (NPI 1215082961) is an individual hematology & oncology provider in Lake Success, New York, licensed in New York (194588) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS, is affiliated with North Shore University Hospital, and is a graduate of New York Medical College (1992).
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
Ruthee-lu Bayer Md 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 Ruthee-lu Bayer reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New Hyde Park, NY 11042
- Reassigned Medicare billing, New York enrollment
- 198 clinicians in this Medicare group
New Hyde Park, NY 11040
- Reassigned Medicare billing, New York enrollment
- 9,353 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 3
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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
North Shore University Hospital
Acute Care Hospitals · Manhasset, NYLong Island Jewish Medical Center
Acute Care Hospitals · New Hyde Park, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11042 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LAKE SUCCESS, NY 11042
LAKE SUCCESS, NY 11042
LAKE SUCCESS, NY 11042
LAKE SUCCESS, NY 11042
LAKE SUCCESS, NY 11042
LAKE SUCCESS, NY 11042
LAKE SUCCESS, NY 11042
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 Ruthee-lu Bayer's NPI number?
The NPI number for Ruthee-lu Bayer is 1215082961. It was assigned to this individual provider in the NPPES registry on January 24, 2007.
Where is Ruthee-lu Bayer located?
Ruthee-lu Bayer practices at The Monter Cancer Center 450 Lakeville Road, Lake Success, NY 11042. The listed phone number is (516) 734-8973.
What is Ruthee-lu Bayer's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Ruthee-lu Bayer enrolled in Medicare?
Yes. Ruthee-lu Bayer 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 Ruthee-lu Bayer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ruthee-lu Bayer reassigns Medicare benefits to 2 organizations: North Shore Health System Medical Faculty Group Practice Inc (New Hyde Park, NY) and North Shore - Lij Medical PC (New Hyde Park, 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 Ruthee-lu Bayer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Ruthee-lu Bayer affiliated with any hospitals?
According to CMS data, Ruthee-lu Bayer is affiliated with North Shore University Hospital and Long Island Jewish Medical Center.
When was this NPI record last updated?
The NPPES record for Ruthee-lu Bayer was last updated on July 8, 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.