James Aaron Leonard, MD
Anesthesiology Physician · Newark, DE
James Aaron Leonard, MD is an anesthesiology physician with a practice address in Newark, Delaware, and NPI 1295977825, issued on Mar 27, 2009. Check the license (Delaware C1-0012020, as entered in NPPES) on the Delaware Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- James Aaron Leonard
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- C1-0012020 DE
Self-reported in NPPES; status is on the state search - Practice location
- 4755 Ogletown-Stanton RD, Newark, DE 19718
- Phone
- (302) 733-1100
- Enumerated
- Mar 27, 2009
- Record last updated
- Jan 7, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (302) 733-2865
- Medicare enrollment
- Enrolled (PECOS I20170621000311); accepts Medicare assignment
- Medical or professional school
- Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc), 2009
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 124 in Delaware → Look up another NPI →
Also registered at 4755 Ogletown-Stanton RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yolanda Angstadt, PACPhysician Assistant1427036136
- Karen Anker, RNC, MSN, NNPNeonatal Nurse Practitioner1952424939
- Ann Bodi, NNPNeonatal Nurse Practitioner1881819191
- Noelle Bothe, NPFamily Nurse Practitioner1740354208
- Kevin Bowman, M.D., M.B.A.Student in an Organized Health Care Education/Training Program1154455905
- Loren Brook, PHARM.D.Pharmacist1154472488
Verify James Aaron Leonard in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersDelaware Board of Medical Licensure and Discipline
Search for license C1-0012020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 70.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Anesthesia Services PAWilmington, DE
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Aaron Leonard among 124 anesthesiology physician records in Delaware
James Aaron Leonard, MD is one of 124 anesthesiology physician records with a practice address in Delaware. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 79% of them.
- NPI issued2009 · 79% of these records are older, 17% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2009 · median 1995 among the 79 with a school on file
- Record last updated2019 · 80% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Delaware practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anesthesiology Physician providers in Delaware
There are 124 anesthesiology physician records in Delaware.
All 124 in Delaware → Every provider in Newark → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Judith Barnett, DONewark, DE 197181932649191
- Sophia Cisler, MDNewark, DE 197181962847707
- Manivanh Keobounnam, MDNewark, DE 197181295897783
- Gina Kim, M.D.Newark, DE 197181679916969
- Patricia Moore, MDNewark, DE 197181215957998
- Leonard Nowcid, MDNewark, DE 197181154766715
- Robert Olszewski, MDNewark, DE 197181447489505
- Read Siry, MDNewark, DE 197181841425576
Common questions
What is James Aaron Leonard, MD's NPI number?
James Aaron Leonard, MD's National Provider Identifier (NPI) is 1295977825, issued on Mar 27, 2009. An NPI identifies a provider in billing; it is not a license.
Where is James Aaron Leonard, MD located?
The NPPES record lists a practice address at 4755 Ogletown-Stanton RD, Newark, DE, 19718. Phone: (302) 733-1100. Providers update this record themselves, so call before visiting.
How can I verify James Aaron Leonard, MD's license?
NPPES lists Delaware license number C1-0012020, as entered by the provider. Search the Delaware Board of Medical Licensure and Discipline at https://delpros.delaware.gov/OH_VerifyLicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is James Aaron Leonard, MD's MIPS final score?
The 2023 MIPS final score is 70.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.