DR. JAMES LAWRENCE O'HALLORAN D.O.
NPI 1912352105
Emergency Medicine in Staten Island, NY
About Dr. James Lawrence O'halloran D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JAMES LAWRENCE O'HALLORAN D.O. (NPI 1912352105) is an individual emergency medicine provider in Staten Island, New York, licensed in Connecticut (63597) and active in the NPI registry since April 2016. He is enrolled in Medicare PECOS, maintains a secondary practice location in Waterbury, and is a graduate of Kansas City University Of Physicians And Surgeons (2016).
NPPES Registry Identity
Specialties & Licenses 2
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
Dr. James Lawrence O'halloran D.o. 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
5Medicare enrollment records show James O'halloran reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Bridgeport, CT 06610
- Reassigned Medicare billing, Connecticut enrollment
- 219 clinicians in this Medicare group
Danbury, CT 06810
- Reassigned Medicare billing, Connecticut enrollment
- 155 clinicians in this Medicare group
Waterbury, CT 06708
- Reassigned Medicare billing, Connecticut enrollment
- 125 clinicians in this Medicare group
Meriden, CT 06451
- Reassigned Medicare billing, Connecticut enrollment
- 96 clinicians in this Medicare group
Willimantic, CT 06226
- Reassigned Medicare billing, Connecticut enrollment
- 104 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10305 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.
STATEN ISLAND, NY 10305
STATEN ISLAND, NY 10305
STATEN ISLAND, NY 10305
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 O'halloran's NPI number?
The NPI number for James O'halloran is 1912352105. It was assigned to this individual provider in the NPPES registry on April 26, 2016.
Where is James O'halloran located?
James O'halloran practices at 475 Seaview Ave, Staten Island, NY 10305. The listed phone number is (718) 226-1548.
What is James O'halloran's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is James O'halloran enrolled in Medicare?
Yes. James O'halloran 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 O'halloran's services?
According to the CMS Revalidation Reassignment List (October 2026 release), James O'halloran reassigns Medicare benefits to 5 organizations: Bridgeport Hospital (Bridgeport, CT), Danbury Hospital (Danbury, CT), Emergency Physicians Of Connecticut PC (Waterbury, CT), Nems PLLC (Meriden, CT) and Northeast Emergency Medicine Specialists, LLC (Willimantic, CT). 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 O'halloran'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 James O'halloran was last updated on June 10, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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 Lawrence O'halloran, D.O. · NPI 1912352105
Emergency Medicine physician in Staten Island, New York. Individual provider, active in the CMS NPPES registry since April 26, 2016.
## Identity
- **NPI:** 1912352105 (Entity type: Individual)
- **Enumerated:** April 26, 2016
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 63597 (Connecticut)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 475 SEAVIEW AVE, Staten Island, NY 10305-3436
- **Phone:** (718) 226-1548
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Bridgeport Hospital (NPI 1649260845, Bridgeport, CT); Danbury Hospital (NPI 1184649667, Danbury, CT); Emergency Physicians Of Connecticut PC (NPI 1902278906, Waterbury, CT); Nems PLLC (NPI 1114482882, Meriden, CT); Northeast Emergency Medicine Specialists, LLC (NPI 1982889598, Willimantic, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Kansas City University Of Physicians And Surgeons, class of 2016
## Record status
- **NPPES last updated:** June 10, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1912352105) · Data from the CMS NPPES public registry.