Dr. Leonard Mason , MD
Surgery โข Newark, DE
4735 Ogletown Stanton Rd Ste 3301
Newark, DE 197137021
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on June 18, 2007; this date does not establish years in practice.
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Published CMS data list 447 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99291 โ Critical care: 155 service units.
- 99232 โ Subsequent hospital care with moderate levelof medical decision making: 82 service units.
- 99223 โ Initial hospital care with moderate level of medical decision making: 72 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 6 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 12 Medicare Part D prescriptions, including refills, in 2018.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2018. Published rows only; this is not a quality measure.
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Published Part D records, 2018:
- Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) โ 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2018. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 95% of clinicians listed under Surgery in Newark, DE (2024, 23 clinicians with data). Median for this group: 252. Middle half: 168 to 336.
More Medicare Part B services than 75% of clinicians listed under Surgery in Delaware (2024, 65 clinicians with data). Median for this group: 269. Middle half: 156 to 394.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 410 in 2020 to 447 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
4735 Ogletown Stanton Rd Ste 3301
Newark, DE 197137021
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Christiana Care Health Services Inc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Temple University School Of Medicine
2007
What Public CMS Data Show
Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
293 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $66,579 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $52,782 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
12 standardized 30-day fills in 2018
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$67 in 2018
The total cost of these prescriptions in 2018, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2018.
Open Payments general payments, program year 2025
All general payments: $42.85 across 2 records.
By nature of payment
- Food and Beverage: $42.85 across 2 records.
Reporting-company totals
- Solventum Corporation: $26.95 across 1 record.
- DePuy Synthes Sales Inc.: $15.90 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
19 years (graduated 2007)
CMS Doctors and Clinicians data list 2007 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2007
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Mason has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Mason as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Newark and Delaware
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 95% of clinicians listed under Surgery in Newark, DE (2024, 23 clinicians with data). Median for this group: 252. Middle half: 168 to 336.
More Medicare Part B services than 75% of clinicians listed under Surgery in Delaware (2024, 65 clinicians with data). Median for this group: 269. Middle half: 156 to 394.
Medicare-allowed amount
A higher Medicare-allowed amount than 90% of clinicians listed under Surgery in Newark, DE (2024, 23 clinicians with data). Median for this group: $30,040. Middle half: $18,691 to $44,079.
A higher Medicare-allowed amount than 75% of clinicians listed under Surgery in Delaware (2024, 65 clinicians with data). Median for this group: $35,404. Middle half: $17,273 to $56,569.
Paid by Medicare
A higher Medicare payment amount than 90% of clinicians listed under Surgery in Newark, DE (2024, 23 clinicians with data). Median for this group: $22,274. Middle half: $14,158 to $34,335.
A higher Medicare payment amount than 75% of clinicians listed under Surgery in Delaware (2024, 65 clinicians with data). Median for this group: $27,457. Middle half: $12,731 to $43,489.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Mason are from 2018.
34 active clinicians are listed under Surgery with a practice address in Newark, DE (109 in Delaware).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Newark
20.6% of these 34 clinicians have the CMS telehealth indicator.
73.5% of these 34 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services varied from year to year: 410 in 2020 and 447 in 2024.
- 2020: 410
- 2021: 501
- 2022: 345
- 2023: 409
- 2024: 447
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Medicare-allowed amount
Medicare-allowed amount increased 18% from $56,564 in 2020 to $66,579 in 2024.
- 2020: $56,564
- 2021: $77,572
- 2022: $59,254
- 2023: $63,458
- 2024: $66,579
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Paid by Medicare
Paid by Medicare increased 17% from $45,304 in 2020 to $52,782 in 2024.
- 2020: $45,304
- 2021: $61,664
- 2022: $47,303
- 2023: $50,136
- 2024: $52,782
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Medicare Part D prescriptions
CMS data for Part D prescriptions are available for 2018 only.
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30-day fills
CMS data for 30-day fills are available for 2018 only.
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Part D drug cost
CMS data for Part D drug cost are available for 2018 only.
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $40.22 in 2021 to $42.85 in 2025.
- 2021: $40.22
- 2022: $16.34
- 2023: $148.81
- 2024: $96.47
- 2025: $42.85
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2018), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): fewer than 11 records totaling $42.85.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Solventum Corporation |
Food and Beverage
Cash or cash equivalent
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V.A.C.ULTA | General | $26.95 |
| DePuy Synthes Sales Inc. |
Food and Beverage
In-kind items and services
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MATRIXRIB | General | $15.90 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2017โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99291
Critical care, first 30-74 minutes
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155 | 77 | $877.30 | $205.92 |
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99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
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82 | 45 | $230.92 | $76.72 |
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99223
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
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72 | 72 | $635.75 | $168.14 |
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99233
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
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63 | 42 | $329.89 | $114.98 |
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99222
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
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45 | 45 | $454.84 | $122.07 |
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99284
Emergency department visit with moderate level of medical decision making
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30 | 30 | $583.66 | $117.58 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2018.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 12 | 45 | $67.43 | 11 |
Source: CMS Part D by Provider and Drug, 2018; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2020-08-13NUCC Taxonomy Code: 208600000X
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
NUCC Taxonomy Code: 208600000X
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
NUCC Taxonomy Code: 2086S0127X
Trauma surgery is a recognized subspecialty of general surgery. Trauma surgeons are physicians who have completed a five-year general surgery residency and usually continue with a one to two year fellowship in trauma and/or surgical critical care, typically leading to additional board certification in surgical critical care. There is no trauma surgery board certification at this point. To obtain board certification in surgical critical care, a fellowship in surgical critical care or anesthesiology critical care must be completed during or after general surgery residency.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - GENERAL SURGERY
I20200629002696
DE
6901112184
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Christiana Care Health Services Inc
4735 Ogletown Stanton Rd, Newark, DE 197137021
Phone: 3026234370
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Nurse Practitioner
Nurse Practitioner - Adult Health
Nurse Practitioner
Surgery - Surgical Critical Care
Doctor of Osteopathic Medicine (D.O.)
Nurse Practitioner
Clinical Nurse Specialist
Surgery
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 4735 OGLETOWN STANTON RD STE 3301, NEWARK, DE 197137021 (Tel: 3026234370)
Registered at 200 HYGEIA DR STE 2300, NEWARK, DE 197132049
Surgery (license number reported to NPPES: DE C1-0013726)
Surgery (license number reported to NPPES: TN 53123)
NPI status registered as active in NPPES database
Registered at 3401 N BROAD ST, 4TH FL PARKINSON PAVILION, PHILADELPHIA, PA 191405103 (Tel: 2157073133)
Registered at 2450 W HUNTING PARK AVE, PHILADELPHIA, PA 191291302 (Tel: 2157073133)
Recorded as LEONARD MASON, MD
Student in an Organized Health Care Education/Training Program
Surgery (license number reported to NPPES: PA MD457506)
Registered at 3401 N BROAD ST, PHILADELPHIA, PA 191405103 (Tel: 2157073133)
Registered at 2450 W HUNTING PARK AVE, PHILADELPHIA, PA 191291302 (Tel: 2157078561)
Surgery (license number reported to NPPES: PA MD457506)
NPI status registered as active in NPPES database
Registered at 877 JEFFERSON AVE, MEMPHIS, TN 381032807 (Tel: 9015456969)
Registered at 877 JEFFERSON AVE, ATTN: PROVIDER ENROLLMENT, MEMPHIS, TN 381032807 (Tel: 9015457302)
Recorded as LEONARD MASON, MD
Surgery (license number reported to NPPES: TN 53123)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Surgery Specialists in Newark
- Dr. Michele Fiorentino, MD
- Dr. William Egan, MD
- Dr. James Jarvis, MD
- Bradley Mudge
- Dr. Leon Kushnir, MD
- Shreya Jammula
Mailing Address
200 Hygeia Dr Ste 2300
Newark, DE 197132049