Dr. Mark J Corso , MD
Specialist • Newark, DE
4745 Ogletown Stanton Rd
Newark, DE 197132067
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 November 14, 2006; this date does not establish years in practice.
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Published CMS data list 6,026 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- J3380 — Injection, vedolizumab, intravenous, 1 mg: 4,800 service units.
- 45385 — Removal of polyps or growths of large bowel using an endoscope with mechanical snare: 229 service units.
- 43239 — Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope: 208 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® 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 20 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 1,080 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Omeprazole — 558 prescription fills, including refills.
- Mesalamine — 92 prescription fills, including refills.
- Esomeprazole Magnesium — 87 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 15 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 75% of clinicians listed under Specialist in Newark, DE (2024, 22 clinicians with data). Median for this group: 1,090. Middle half: 253 to 5,375.
More Medicare Part B services than 75% of clinicians listed under Specialist in Delaware (2024, 29 clinicians with data). Median for this group: 1,065. Middle half: 336 to 3,420.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 1,006 in 2020 to 6,026 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
4745 Ogletown Stanton Rd
Newark, DE 197132067
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 2 distinct group names: Christiana Care Health Services Inc; Delaware Center For Digestive Care Llc. 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
Hahnemann University College Of Medicine
1997
What Public CMS Data Show
Specialist: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
822 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 – by Provider, 2024.
Medicare-allowed amount
About $279,542 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 – by Provider and Service, 2024.
Paid by Medicare
About $224,252 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 – by Provider and Service, 2024.
30-day fills
3,005 standardized 30-day fills in 2024
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
$179,502 in 2024
The total cost of these prescriptions in 2024, 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 – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $312.96 across 16 records.
By nature of payment
- Food and Beverage: $312.96 across 16 records.
Reporting-company totals (3 largest of 9)
- Janssen Pharmaceuticals, Inc: $56.42 across 2 records.
- Takeda Pharmaceuticals U.S.A., Inc.: $50.83 across 2 records.
- Salix Pharmaceuticals, a division of Bausch Health US, LLC: $43.36 across 2 records.
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
29 years (graduated 1997)
CMS Doctors and Clinicians data list 1997 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
2006
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, “Does your provider accept Medicare as full payment?”
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. Corso 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. Corso 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 75% of clinicians listed under Specialist in Newark, DE (2024, 22 clinicians with data). Median for this group: 1,090. Middle half: 253 to 5,375.
More Medicare Part B services than 75% of clinicians listed under Specialist in Delaware (2024, 29 clinicians with data). Median for this group: 1,065. Middle half: 336 to 3,420.
Medicare-allowed amount
A higher Medicare-allowed amount than 80% of clinicians listed under Specialist in Newark, DE (2024, 22 clinicians with data). Median for this group: $225,035. Middle half: $23,813 to $259,397.
A higher Medicare-allowed amount than 75% of clinicians listed under Specialist in Delaware (2024, 29 clinicians with data). Median for this group: $214,515. Middle half: $33,875 to $261,723.
Paid by Medicare
A higher Medicare payment amount than 80% of clinicians listed under Specialist in Newark, DE (2024, 22 clinicians with data). Median for this group: $169,864. Middle half: $17,724 to $203,278.
A higher Medicare payment amount than 80% of clinicians listed under Specialist in Delaware (2024, 29 clinicians with data). Median for this group: $157,289. Middle half: $21,824 to $208,705.
Medicare Part D prescriptions
More Part D prescriptions than 80% of clinicians listed under Specialist in Newark, DE (2024, 21 clinicians with data). Median for this group: 357. Middle half: 51 to 896.
More Part D prescriptions than 75% of clinicians listed under Specialist in Delaware (2024, 29 clinicians with data). Median for this group: 216. Middle half: 51 to 1,080.
Part D drug cost
A higher Part D drug cost than 85% of clinicians listed under Specialist in Newark, DE (2024, 21 clinicians with data). Median for this group: $13,355. Middle half: $736 to $101,902.
A higher Part D drug cost than 80% of clinicians listed under Specialist in Delaware (2024, 29 clinicians with data). Median for this group: $13,355. Middle half: $736 to $144,437.
43 active clinicians are listed under Specialist with a practice address in Newark, DE (134 in Delaware).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Newark
7% of these 43 clinicians have the CMS telehealth indicator.
48.8% of these 43 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 increased 499% from 1,006 in 2020 to 6,026 in 2024.
- 2020: 1,006
- 2021: 1,240
- 2022: 1,160
- 2023: 1,128
- 2024: 6,026
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Medicare-allowed amount
Medicare-allowed amount increased 103% from $137,946 in 2020 to $279,542 in 2024.
- 2020: $137,946
- 2021: $192,759
- 2022: $176,728
- 2023: $169,987
- 2024: $279,542
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Paid by Medicare
Paid by Medicare increased 109% from $107,072 in 2020 to $224,252 in 2024.
- 2020: $107,072
- 2021: $147,576
- 2022: $136,066
- 2023: $135,610
- 2024: $224,252
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Medicare Part D prescriptions
Medicare Part D prescriptions stayed about the same: 1,087 in 2020 and 1,080 in 2024.
- 2020: 1,087
- 2021: 1,054
- 2022: 1,105
- 2023: 1,064
- 2024: 1,080
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30-day fills
30-day fills increased 11% from 2,709 in 2020 to 3,005 in 2024.
- 2020: 2,709
- 2021: 2,687
- 2022: 2,895
- 2023: 2,879
- 2024: 3,005
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Part D drug cost
Part D drug cost decreased 55% from $394,916 in 2020 to $179,502 in 2024.
- 2020: $394,916
- 2021: $441,958
- 2022: $446,447
- 2023: $503,325
- 2024: $179,502
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $147.43 in 2021 to $312.96 in 2025.
- 2021: $147.43
- 2022: $169.09
- 2023: $178.39
- 2024: $645.39
- 2025: $312.96
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · 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 – December 31, 2025): 16 records totaling $312.96.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
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TREMFYA | General | $33.93 |
| Takeda Pharmaceuticals U.S.A., Inc. |
Food and Beverage
In-kind items and services
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ENTYVIO | General | $26.83 |
| Madrigal Pharmaceuticals |
Food and Beverage
In-kind items and services
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REZDIFFRA | General | $26.45 |
| Takeda Pharmaceuticals U.S.A., Inc. |
Food and Beverage
In-kind items and services
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GATTEX | General | $24.00 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
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TREMFYA | General | $22.49 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC |
Food and Beverage
In-kind items and services
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XIFAXAN | General | $22.09 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC |
Food and Beverage
In-kind items and services
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XIFAXAN | General | $21.27 |
| Ardelyx, Inc. |
Food and Beverage
In-kind items and services
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IBSRELA | General | $19.84 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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RINVOQ | General | $19.70 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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OMVOH | General | $19.55 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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RINVOQ | General | $16.82 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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VELSIPITY | General | $14.96 |
| Phathom Pharmaceuticals, Inc. |
Food and Beverage
Cash or cash equivalent
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VOQUEZNA | General | $14.26 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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XELJANZ | General | $13.58 |
| Phathom Pharmaceuticals, Inc. |
Food and Beverage
Cash or cash equivalent
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VOQUEZNA | General | $8.70 |
| Phathom Pharmaceuticals, Inc. |
Food and Beverage
Cash or cash equivalent
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VOQUEZNA | General | $8.49 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 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 – by Provider and Service data, 2017–2024; 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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J3380
Injection, vedolizumab, intravenous, 1 mg
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4,800 | 13 | $60.00 | $22.27 |
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45385
Removal of polyps or growths of large bowel using an endoscope with mechanical snare
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229 | 226 | $946.92 | $243.34 |
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43239
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope
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208 | 204 | $353.27 | $84.97 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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140 | 125 | $325.71 | $125.05 |
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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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140 | 138 | $435.02 | $126.69 |
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45380
Biopsy of large bowel using a flexible endoscope
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115 | 115 | $511.49 | $107.92 |
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G0105
Colorectal cancer screening; colonoscopy on individual at high risk
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72 | 72 | $460.00 | $174.60 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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63 | 58 | $230.00 | $89.19 |
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G0121
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk
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37 | 37 | $465.00 | $174.64 |
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74328
Review by radiologist of image from tube placement into bile duct using an endoscope
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29 | 28 | $93.05 | $22.30 |
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43262
Incision of pancreatic outlet using a flexible endoscope
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27 | 27 | $1011.43 | $136.34 |
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43264
Removal of stone or debris from bile or pancreatic duct using a flexible endoscope
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25 | 24 | $1030.77 | $237.68 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
|
25 | 25 | $425.00 | $163.99 |
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43249
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm
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23 | 21 | $392.63 | $128.56 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
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22 | 22 | $285.00 | $109.41 |
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96365
Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less
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17 | 14 | $325.00 | $61.15 |
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45381
Injection beneath lining of large bowel using a flexible endoscope
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15 | 14 | $520.50 | $15.04 |
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43273
Exam of common bile and/or pancreatic duct using a flexible endoscope
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14 | 13 | $339.56 | $114.61 |
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45378
Diagnostic exam of large bowel using a flexible endoscope
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13 | 13 | $514.29 | $170.56 |
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43255
Control of bleeding of esophagus, stomach, and/or upper small bowel using a flexible endoscope
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12 | 12 | $551.75 | $176.76 |
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 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Omeprazole | Omeprazole | 558 | 50,074 | $11,194.30 | 181 |
| Mesalamine | Mesalamine | 92 | 6,987 | $47,024.77 | 23 |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 87 | 7,725 | $4,867.48 | 23 |
| Famotidine | Famotidine | 65 | 5,785 | $1,177.61 | 22 |
| Dicyclomine Hcl | Dicyclomine Hcl | 42 | 3,177 | $920.64 | 17 |
| Ursodiol | Ursodiol | 42 | 3,141 | $5,439.42 | — |
| Dexlansoprazole Dr | Dexlansoprazole | 33 | 2,220 | $9,848.25 | — |
| Pantoprazole Sodium | Pantoprazole Sodium | 31 | 2,657 | $658.91 | — |
| Linzess | Linaclotide | 29 | 1,710 | $29,945.76 | — |
| Lansoprazole | Lansoprazole | 24 | 2,170 | $1,183.70 | — |
| Cholestyramine | Cholestyramine (With Sugar) | 19 | 1,020 | $1,488.41 | — |
| Budesonide Ec | Budesonide | 17 | 930 | $2,878.58 | — |
| Ondansetron Hcl | Ondansetron Hcl | 15 | 450 | $416.81 | — |
| Creon | Lipase/Protease/Amylase | 14 | 897 | $59,099.78 | — |
| Mesalamine Er | Mesalamine | 12 | 1,080 | $3,357.13 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 174400000X
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - GASTROENTEROLOGY
I20101014001315
DE
9739180696
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
4755 Ogletown Stanton Rd, Newark, DE 197182200
Phone: 3027331000
Delaware Center For Digestive Care Llc
4745 Ogletown Stanton Rd, Newark, DE 197132074
Phone: 3027385300
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Specialist
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Specialist
Doctor of Medicine (M.D.)
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Internal Medicine - Gastroenterology
Doctor of Medicine (M.D.)
Specialist
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated November 14, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Specialists in Newark
- Dr. Lee Dresser, MD
- Dr. Christopher Saunders, MD
- Dr. Mehdi Balakhani, MD, DDS, PA
- Kieran Connolly
- Dr. George Giannoukos, MD
- Dr. Dennis Witmer, MD
Mailing Address
37 Rockford Rd
Wilmington, DE 198061003
Phone: 3027385300