DR. JAMES AARON LEONARD MD
NPI 1295977825
Anesthesiology in Newark, DE
About Dr. James Aaron Leonard Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JAMES AARON LEONARD MD (NPI 1295977825) is an individual anesthesiology provider in Newark, Delaware, licensed in Delaware (C1-0012020) and active in the NPI registry since March 2009. He is enrolled in Medicare PECOS and is a graduate of Rutgers R W Johnson Medical School (cam/new Bruns/pisc) (2009).
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 Aaron Leonard 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 Reassignment
Medicare enrollment records show James Leonard reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New Castle, DE 19720
- Reassigned Medicare billing, Delaware enrollment
- 348 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.
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.
NEWARK, DE 19718
NEWARK, DE 19718
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 Leonard's NPI number?
The NPI number for James Leonard is 1295977825. It was assigned to this individual provider in the NPPES registry on March 27, 2009.
Where is James Leonard located?
James Leonard practices at 4755 Ogletown-Stanton Rd, Newark, DE 19718. The listed phone number is (302) 733-1100.
What is James Leonard's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is James Leonard enrolled in Medicare?
Yes. James Leonard 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 organization bills Medicare for James Leonard's services?
According to the CMS Revalidation Reassignment List (October 2026 release), James Leonard reassigns Medicare benefits to Anesthesia Services PA (New Castle, DE). The 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 Leonard'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 Leonard was last updated on January 7, 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 Aaron Leonard, MD · NPI 1295977825
Anesthesiology physician in Newark, Delaware. Individual provider, active in the CMS NPPES registry since March 27, 2009.
## Identity
- **NPI:** 1295977825 (Entity type: Individual)
- **Enumerated:** March 27, 2009
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** C1-0012020 (Delaware)
- **Sole proprietor:** No
## Practice location
- **Address:** 4755 OGLETOWN-STANTON RD, Newark, DE 19718
- **Phone:** (302) 733-1100 · **Fax:** (302) 733-2865
## 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:** Anesthesia Services PA (NPI 1053366377, New Castle, DE), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rutgers R W Johnson Medical School, class of 2009
## Record status
- **NPPES last updated:** January 7, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1295977825) · Data from the CMS NPPES public registry.