Dr. James Aaron Leonard, MD
- Medicare services, 2024
- 197
- Medicare patients, 2024
- 148
- Hospital affiliations
- 1
- Industry payments
- $268
- Medical group
- 1
- Practice address
- 501 W 14th St, Wilmington, DE 19801
- Practice phone
- Call (302) 733-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
ChristianaCare Wilmington Hospital
Wilmington, Delaware
Find Dr. Leonard's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. James Aaron Leonard is an anesthesiologist in Wilmington, Delaware
Dr. Leonard practices at ChristianaCare Wilmington Hospital in Wilmington, Delaware.
Dr. Leonard's NPI, 1295977825, was assigned on March 27, 2009. Dr. Leonard graduated from Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc) in 2009. Dr. Leonard holds Delaware license C1-0012020.
- NPI
- 1295977825NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6204082571
- NPI enumeration date
- March 27, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (302) 733-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James Aaron Leonard practices at ChristianaCare Wilmington Hospital in Wilmington, Delaware
Dr. Leonard's primary practice is ChristianaCare Wilmington Hospital, at 501 W 14th St, Wilmington, DE 19801 in New Castle County. The practice phone is (302) 733-1000.
- ChristianaCare Wilmington Hospital501 W 14th St, Wilmington, DE 19801 · New Castle CountyPhone(302) 733-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. James Aaron Leonard is affiliated with 2 sites of care and 1 medical group
Dr. Leonard's primary practice is ChristianaCare Wilmington Hospital in Wilmington, Delaware. Dr. Leonard is also affiliated with Christiana Hospital. The medical group on file is Anesthesia Services, P.A.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. James Aaron Leonard's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leonard practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| ChristianaCare Wilmington Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. James Aaron Leonard is one of 134 anesthesiologists in Delaware
Anesthesiology is Dr. Leonard's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Leonard is licensed in Delaware.
Specialties and state licenses
- Anesthesiology, DelawarePrimary
Anesthesiologists near Dr. Leonard
Counts of anesthesiologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. James Aaron Leonard billed Medicare for 197 services in 2024
CMS data shows 197 Medicare services from Dr. Leonard across 4 procedure codes in 2024, for 148 Medicare patients. Medicare paid $10,614 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Leonard's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1662024: 10040%
- Anesthesia
- 2023: 272024: 76181%
- Surgery
- 2023: 162024: 2131%
Dr. Leonard compared with the Delaware median for anesthesiologists, 2024
- Dr. Leonard
- Delaware median
- Medicare services
- 197vs 10195% above
- Medicare patients
- 148vs 13410% above
Medians across 124 anesthesiologists in Delaware with Dmand AI profiles that report each measure.
Dr. Leonard's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Leonard?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Leonard and other anesthesiologists in Delaware.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James Aaron Leonard treated 148 Medicare patients in 2024, average age 76
CMS counts 148 Medicare patients who saw Dr. Leonard in 2024. The largest group is 65 to 74, with 64 patients. 75% of them have atrial fibrillation, and 75% have high blood pressure. 8% are also on Medicaid. Their average risk score is 1.39, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Leonard's median patient age at 71, with 45% women.
Dr. Leonard's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Leonard's Medicare patients by sex, 2024
- Women6443%
- Men8457%
Chronic conditions among Dr. Leonard's Medicare patients, 2024
- Atrial fibrillation75%
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease63%
- Heart failure50%
- Arthritis49%
- Diabetes41%
- Chronic kidney disease29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Leonard's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women45%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. James Aaron Leonard takes part in Medicare
Dr. Leonard accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. James Aaron Leonard received $268 in industry payments from 2016 to 2025
CMS Open Payments shows 7 general payments to Dr. Leonard from 5 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Abbott Laboratories paid the most, $99.
General payments to Dr. Leonard by program year, 2016 to 2025
Companies that paid Dr. Leonard the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James Aaron Leonard graduated from Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc)
Dr. Leonard graduated from Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc) in 2009.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. James Aaron Leonard's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. James Aaron Leonard
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. James Aaron Leonard's NPI number?
Dr. James Aaron Leonard's NPI number is 1295977825. It was assigned on March 27, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. James Aaron Leonard?
Dr. James Aaron Leonard is an anesthesiologist in Wilmington, Delaware. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. James Aaron Leonard practice?
Dr. Leonard practices at 501 W 14th St, Wilmington, DE 19801. Dr. Leonard's primary practice is ChristianaCare Wilmington Hospital in Wilmington, Delaware.
What is Dr. James Aaron Leonard's office phone number?
The practice phone on file for Dr. Leonard is (302) 733-1000.
What is Dr. James Aaron Leonard's medical license number?
Dr. Leonard holds Delaware license C1-0012020.
Which hospitals is Dr. James Aaron Leonard affiliated with?
Dr. Leonard is affiliated with Christiana Hospital.
What medical group is Dr. James Aaron Leonard part of?
Dr. Leonard is linked to Anesthesia Services, P.A.
Does Dr. James Aaron Leonard accept Medicare?
Yes. CMS data shows Dr. Leonard billed Medicare for 197 services in 2024, and Dr. Leonard accepts Medicare assignment.
How many Medicare patients does Dr. James Aaron Leonard see?
CMS counts 148 Medicare patients who saw Dr. Leonard in 2024, with an average age of 76.
What services does Dr. James Aaron Leonard bill to Medicare?
In 2024, Dr. Leonard's most billed Medicare services were anesthesia (00410), heart test or procedure (93312) and heart test or procedure (93325).
Show 3 more questionsShow fewer questions
Where did Dr. James Aaron Leonard go to medical school?
Dr. Leonard graduated from Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc) in 2009.
Has Dr. James Aaron Leonard received payments from drug or device companies?
CMS Open Payments shows $268 in general payments to Dr. Leonard from 5 companies from 2016 to 2025. The largest total came from Abbott Laboratories.
How long has Dr. James Aaron Leonard been practicing?
Dr. Leonard graduated from medical school in 2009, 17 years ago.
Selling to anesthesiology practices?
See anesthesiologists in Delaware by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card