Active NPI 1114122355 Individual Practitioner Male Practitioner

Dr. Leonard Mason , MD

Surgery • Newark, DE

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Leonard Mason, MD is a certified Surgery practicing in Newark, DE. With approximately 19 years of clinical experience since graduating from Temple University School Of Medicine in 2007, Dr. Mason delivers high-quality medical care to the local community at 4735 OGLETOWN STANTON RD STE 3301.

Dr. Mason is affiliated with Christiana Care Health Services Inc and accepts Medicare assignment.

Frequently performed procedures and clinical services include critical care, first, subsequent hospital care with moderate levelof medical decision making, if using time, at least, initial hospital care with moderate level of medical decision making, if using time, at least. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

4735 Ogletown Stanton Rd Ste 3301

Newark, DE 197137021

Telephone 3026234370

Associated Practice Facility / Clinic

🏢 Christiana Care Health Services, Inc Facility NPI 1407831894

Medicare Profile & Education

Medical School

Temple University School Of Medicine

Graduation Year

2007

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Newark, DE

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

19 Yrs -2.3 yrs vs City Avg

City Avg: 21.3 Yrs

State Avg: 23.3 Yrs

Regional Practice Density

36 Specialists

Practicing in Newark, DE (115 Statewide)

Telehealth Adoption Rate

19.4% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

74.1% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Mason (19 Years) 19 Yrs

Newark Specialty Average (21.3 Years) 21.3 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99291 Critical care, first 30-74 minutes	155	77	$877.30	$205.92
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	82	45	$230.92	$76.72
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	72	72	$635.75	$168.14
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	63	42	$329.89	$114.98
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	45	45	$454.84	$122.07
99284 Emergency department visit with moderate level of medical decision making	30	30	$583.66	$117.58

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99291 Critical care, first 30-74 minutes	142	69	$851.77	$213.99
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	79	79	$618.31	$174.17
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	74	45	$321.82	$115.58
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	37	20	$220.21	$79.43
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	26	26	$452.96	$130.65
99283 Emergency department visit with low level of medical decision making	22	22	$377.42	$72.15
99221 Initial hospital inpatient care per day, typically 30 minutes	18	18	$328.15	$83.39
99284 Emergency department visit with moderate level of medical decision making	11	11	$574.65	$121.33

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99291 Critical care, first 30-74 minutes	161	73	$629.07	$221.10
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	79	46	$264.32	$103.74
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	56	54	$552.53	$200.09
99221 Initial hospital inpatient care per day, typically 30 minutes	28	28	$308.61	$98.11
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	21	15	$192.66	$71.86

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99291 Critical care, first 30-74 minutes	154	81	$547.20	$224.59
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	126	87	$254.22	$104.99
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	97	96	$498.18	$204.06
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	79	61	$176.79	$73.26
99221 Initial hospital inpatient care per day, typically 30 minutes	16	16	$273.74	$102.94
99231 Follow-up hospital inpatient care per day, typically 15 minutes	15	12	$95.76	$39.12
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	14	14	$370.50	$138.63

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99291 Critical care, first 30-74 minutes	124	57	$554.57	$233.08
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	115	78	$168.07	$75.35
99231 Follow-up hospital inpatient care per day, typically 15 minutes	64	43	$93.41	$41.27
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	42	42	$331.59	$144.90
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	34	24	$244.65	$109.24
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	31	31	$489.91	$211.48

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99291 Critical care, first 30-74 minutes	102	37	$540.00	$206.94
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	93	47	$140.32	$77.58
99231 Follow-up hospital inpatient care per day, typically 15 minutes	60	45	$85.00	$42.06
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	23	23	$290.65	$146.35
99213 Established patient office or other outpatient visit, typically 15 minutes	13	13	$130.00	$79.52
99238 Hospital discharge day management, 30 minutes or less	11	11	$156.36	$78.07

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99291 Critical care, first 30-74 minutes	172	67	$540.00	$235.50
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	105	72	$140.43	$76.91
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	33	25	$200.00	$110.06
99238 Hospital discharge day management, 30 minutes or less	20	20	$150.00	$77.37
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	13	13	$279.62	$144.70
99213 Established patient office or other outpatient visit, typically 15 minutes	12	12	$130.00	$77.43

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99291 Critical care, first 30-74 minutes	147	59	$540.00	$235.21
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	111	62	$140.00	$75.75
99231 Follow-up hospital inpatient care per day, typically 15 minutes	32	13	$85.00	$41.30
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	25	21	$200.00	$109.64
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	22	22	$295.00	$144.09
99238 Hospital discharge day management, 30 minutes or less	14	14	$150.00	$70.86

Medical Specialties & State Licenses

CMS Verified: 2020-08-13

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License DE C1-0013726

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.

Surgery

NUCC Taxonomy Code: 208600000X

State License PA MD457506

Surgery - Trauma Surgery

NUCC Taxonomy Code: 2086S0127X

State License TN 53123

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.

Hospital & Practice Group Affiliations

Christiana Care Health Services Inc

4735 Ogletown Stanton Rd, Newark, DE 197137021

Phone: 3026234370

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners

Kathy Gallagher , APN

Nurse Practitioner - Family

NPI 1003126764

Advanced Practice Nurse

Dr. Luis Cardenas, Do , DO

Surgery - Surgical Critical Care

NPI 1093033482

Doctor of Osteopathic Medicine (D.O.)

Eneyda Espino-Gomez , PA-C

Physician Assistant

NPI 1134855620

Physician Assistant (Certified)

Kathryn Hook , NP

Nurse Practitioner

NPI 1184012783

Nurse Practitioner

Mary Ciechanowski

Clinical Nurse Specialist - Neuroscience

NPI 1184658445

Bradley Mudge

Surgery

NPI 1205839321

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

19 Historical Events

📍

Updated Practice Location August 13, 2020

Registered at 4735 OGLETOWN STANTON RD STE 3301, NEWARK, DE 197137021 (Tel: 3026234370)

📍

Updated Business Mailing Address August 13, 2020

Registered at 200 HYGEIA DR STE 2300, NEWARK, DE 197132049

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) August 13, 2020

Surgery (License #C1-0013726 in DE)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 23, 2020

Surgery (License #53123 in TN)

✅

NPI Profile Active March 21, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location March 21, 2017

Registered at 3401 N BROAD ST, 4TH FL PARKINSON PAVILION, PHILADELPHIA, PA 191405103 (Tel: 2157073133)

📍

Updated Business Mailing Address March 21, 2017

Registered at 2450 W HUNTING PARK AVE, PHILADELPHIA, PA 191291302 (Tel: 2157073133)

👤

Provider Name / Credentials Updated March 21, 2017

Recorded as LEONARD MASON, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) March 21, 2017

Student in an Organized Health Care Education/Training Program

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) March 21, 2017

Surgery (License #MD457506 in PA)

📍

Updated Practice Location February 15, 2017

Registered at 3401 N BROAD ST, PHILADELPHIA, PA 191405103 (Tel: 2157073133)

📍

Updated Business Mailing Address February 15, 2017

Registered at 2450 W HUNTING PARK AVE, PHILADELPHIA, PA 191291302 (Tel: 2157078561)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) February 15, 2017

Surgery (License #MD457506 in PA)

✅

NPI Profile Active July 03, 2015

NPI status registered as active in NPPES database

📍

Updated Practice Location July 03, 2015

Registered at 877 JEFFERSON AVE, MEMPHIS, TN 381032807 (Tel: 9015456969)

📍

Updated Business Mailing Address July 03, 2015

Registered at 877 JEFFERSON AVE, ATTN: PROVIDER ENROLLMENT, MEMPHIS, TN 381032807 (Tel: 9015457302)

👤

Provider Name / Credentials Updated July 03, 2015

Recorded as LEONARD MASON, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 03, 2015

Surgery (License #53123 in TN)

🟢

Initial NPI Registration & Enumeration June 18, 2007

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1114122355

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: June 18, 2007

Last Update: August 13, 2020

Sole Proprietor: No

Update or Correct Profile

Mailing Address

200 Hygeia Dr Ste 2300

Newark, DE 197132049

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.