BRIAN FLAHERTY MD
NPI 1083666846
Internal Medicine - Hematology & Oncology in Brooklyn, NY
About Brian Flaherty Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BRIAN FLAHERTY MD (NPI 1083666846) is an individual hematology & oncology provider in Brooklyn, New York, licensed in New York (175318) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Nyu Langone Hospitals, and is a graduate of Other (1985).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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
Brian Flaherty 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 Brian Flaherty reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Bronx, NY 10461
- Reassigned Medicare billing, New York enrollment
- 92 clinicians in this Medicare group
Boynton Beach, FL 33426
- Reassigned Medicare billing, New York enrollment
- 7,712 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 4
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Nyu Langone Hospitals
Acute Care Hospitals · New York, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11209 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BROOKLYN, NY 11209
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 Brian Flaherty's NPI number?
The NPI number for Brian Flaherty is 1083666846. It was assigned to this individual provider in the NPPES registry on May 17, 2006.
Where is Brian Flaherty located?
Brian Flaherty practices at 9920 4th Ave, Brooklyn, NY 11209. The listed phone number is (718) 921-1672.
What is Brian Flaherty's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Brian Flaherty enrolled in Medicare?
Yes. Brian Flaherty 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 Brian Flaherty's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brian Flaherty reassigns Medicare benefits to 2 organizations: Calvary Hospital Inc (Bronx, NY) and New York University (Boynton Beach, FL). 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 Brian Flaherty's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Brian Flaherty affiliated with any hospitals?
According to CMS data, Brian Flaherty is affiliated with Nyu Langone Hospitals.
When was this NPI record last updated?
The NPPES record for Brian Flaherty was last updated on March 30, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Brian Flaherty, MD · NPI 1083666846
Hematology & Oncology physician in Brooklyn, New York. Individual provider, active in the CMS NPPES registry since May 17, 2006.
## Identity
- **NPI:** 1083666846 (Entity type: Individual)
- **Enumerated:** May 17, 2006
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** 175318 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 9920 4TH AVE, Brooklyn, NY 11209-8333
- **Phone:** (718) 921-1672
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Calvary Hospital Inc (NPI 1528495306, Bronx, NY); New York University (NPI 1285826438, Boynton Beach, FL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1985
## Record status
- **NPPES last updated:** March 30, 2021
- **Other identifiers:** Medicaid 01780689 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1083666846) · Data from the CMS NPPES public registry.