DR. JAMES MARTIN WILLIS MD
NPI 1063647022
Emergency Medicine in Brooklyn, NY
About Dr. James Martin Willis Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JAMES MARTIN WILLIS MD (NPI 1063647022) is an individual emergency medicine provider in Brooklyn, New York, licensed in New York (263862) and active in the NPI registry since May 2009. He is enrolled in Medicare PECOS, is affiliated with Mount Sinai South Nassau, and is a graduate of Other (2006).
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
Dr. James Martin Willis 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
4Medicare enrollment records show James Willis reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Brooklyn, NY 11203
- Reassigned Medicare billing, New York enrollment
- 63 clinicians in this Medicare group
Brooklyn, NY 11203
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: State Of New York Comptrollers Office
- 67 clinicians in this Medicare group
Far Rockaway, NY 11691
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Island Emergency Medical Services PC
- 290 clinicians in this Medicare group
Oceanside, NY 11572
- 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mount Sinai South Nassau
Acute Care Hospitals · Oceanside, NYKings County Hospital Center
Acute Care Hospitals · Brooklyn, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11203 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 11203
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 James Willis's NPI number?
The NPI number for James Willis is 1063647022. It was assigned to this individual provider in the NPPES registry on May 20, 2009.
Where is James Willis located?
James Willis practices at 451 Clarkson Ave, Brooklyn, NY 11203. The listed phone number is (718) 245-3318.
What is James Willis's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is James Willis enrolled in Medicare?
Yes. James Willis 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 James Willis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), James Willis reassigns Medicare benefits to 4 organizations: University Hospital Of Brooklyn Suny Downstate Health Sciences Univers (Brooklyn, NY), Suny Health Science Center At Bklyn (Brooklyn, NY), Island Emergency Medical Services, P.C. (Far Rockaway, NY) and South Nassau Physician Group PC (Oceanside, 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 James Willis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is James Willis affiliated with any hospitals?
According to CMS data, James Willis is affiliated with Mount Sinai South Nassau and Kings County Hospital Center.
When was this NPI record last updated?
The NPPES record for James Willis was last updated on June 5, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Dr. James Martin Willis, MD · NPI 1063647022
Emergency Medicine physician in Brooklyn, New York. Individual provider, active in the CMS NPPES registry since May 20, 2009.
## Identity
- **NPI:** 1063647022 (Entity type: Individual)
- **Enumerated:** May 20, 2009
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 263862 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 451 CLARKSON AVE, Brooklyn, NY 11203-2054
- **Phone:** (718) 245-3318
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): University Hospital Of Brooklyn Suny Downstate Health Sciences Univers (NPI 1740853340, Brooklyn, NY); Suny Health Science Center At Bklyn (NPI 1588077994, Brooklyn, NY); Island Emergency Medical Services, P.C. (NPI 1639160385, Far Rockaway, NY); South Nassau Physician Group PC (NPI 1922460542, Oceanside, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2006
## Record status
- **NPPES last updated:** June 5, 2013
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Source: [NPI Profile](https://npiprofile.com/npi/1063647022) · Data from the CMS NPPES public registry.