DR. LEONARD MASON MD
NPI 1114122355
Surgery in Newark, DE

Active since June 18, 2007PECOS EnrolledAccepts Medicare Assignment
4735 OGLETOWN STANTON RD STE 3301, NEWARK, DE 19713(302) 623-4370 Get Directions Write a Review

NPPES record last updated: August 13, 2020. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Aug 13, 2020, Jun 23, 2020, Mar 21, 2017 and 2 more (5 updates tracked since 2017).

About Dr. Leonard Mason Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. LEONARD MASON MD (NPI 1114122355) is an individual surgery provider in Newark, Delaware, licensed in Delaware (C1-0013726) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS, is affiliated with Union Hospital Of Cecil County, and is a graduate of Temple University School Of Medicine (2007).

NPPES Registry Identity

NPI1114122355
Entity TypeIndividualMale
Primary Taxonomy208600000X
Provider Legal NameDR. LEONARD MASONCredential: MD
Location Address4735 OGLETOWN STANTON RD STE 3301Newark, DE 19713-7021
Mailing Address200 Hygeia Dr Ste 2300Newark, DE 19713-2049
Sole ProprietorNo
Medical School CMSTemple University School Of MedicineGraduated 2007
Enumeration DateJune 18, 2007
Last NPPES UpdateAugust 13, 20205 updates tracked since enumeration
NPPES CertifiedAugust 13, 2020
NPI 1114122355 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
Licenses Licensed in DE · C1-0013726 Licensed in PA · MD457506
Definition
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.
Also ListedSurgery · Trauma SurgeryTaxonomy 2086S0127X · License 53123 (TN)
4735 OGLETOWN STANTON RD STE 3301, Newark, DE 19713

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. Leonard Mason 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.

PECOS PAC ID6901112184
PECOS Enrollment IDI20200629002696
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 6

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.

Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
155 services77 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
82 services45 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
72 services72 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
63 services42 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
45 services45 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
30 services30 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Union Hospital Of Cecil County

Acute Care Hospitals · Elkton, MD
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number210032
Location106 Bow StreetElkton, MD 21921 · Cecil County
Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19713 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$88.37 typical visit price
range $57.12 – $173.08
Typical copayment $22.09 (range $14.28 – $43.27)
Most-billed visit code 99203
Established Patient
$71.19 typical visit price
range $18.36 – $141.05
Typical copayment $17.79 (range $4.59 – $35.26)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 18

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Physician Assistant
4735 OGLETOWN STANTON RD STE 3301
NEWARK, DE 19713
Surgery
4735 OGLETOWN STANTON RD STE 3301
NEWARK, DE 19713
Surgery
4735 OGLETOWN STANTON RD STE 3301
NEWARK, DE 19713
Surgery
4735 OGLETOWN STANTON RD STE 3301
NEWARK, DE 19713
Physician Assistant
4735 OGLETOWN STANTON RD STE 3301
NEWARK, DE 19713
Physician Assistant
4735 OGLETOWN STANTON RD STE 3301
NEWARK, DE 19713
Physician Assistant
4735 OGLETOWN STANTON RD STE 3301
NEWARK, DE 19713
Physician Assistant (Surgical)
4735 OGLETOWN STANTON RD STE 3301
NEWARK, DE 19713

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 Leonard Mason's NPI number?

The NPI number for Leonard Mason is 1114122355. It was assigned to this individual provider in the NPPES registry on June 18, 2007.

Where is Leonard Mason located?

Leonard Mason practices at 4735 Ogletown Stanton Rd Ste 3301, Newark, DE 19713. The listed phone number is (302) 623-4370.

What is Leonard Mason's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Leonard Mason enrolled in Medicare?

Yes. Leonard Mason 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.

What insurance does Leonard Mason accept?

Health plans from AmeriHealth Caritas Next list Leonard Mason as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Leonard Mason affiliated with any hospitals?

According to CMS data, Leonard Mason is affiliated with Union Hospital Of Cecil County.

When was this NPI record last updated?

The NPPES record for Leonard Mason was last updated on August 13, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.