Dr. Matthew A Pieper , DO
Surgery โข Saint Louis, MO
621 S New Ballas Rd Ste 560a
Saint Louis, MO 631418261
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 July 28, 2008; this date does not establish years in practice.
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Published CMS data list 27 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:
- 99213 โ Established patient outpatient office visit: 27 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 the full table ยท Guide: How to read Medicare Part B data
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Published CMS data list 66 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Oxycodone Hcl โ 46 prescription fills, including refills.
- Gavilyte-C (Peg3350/Sod Sulf,bicarb,cl/Kcl) โ 20 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. 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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Fewer Medicare Part B services than 90% of clinicians listed under Surgery in Saint Louis, MO (2024, 92 clinicians with data). Median for this group: 175. Middle half: 92 to 288.
Fewer Medicare Part B services than 90% of clinicians listed under Surgery in Missouri (2024, 351 clinicians with data). Median for this group: 195. Middle half: 102 to 317.
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 148 in 2020 to 27 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
621 S New Ballas Rd Ste 560a
Saint Louis, MO 631418261
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: Mercy Clinic Trauma And General Surgery 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
At Still University Of Health Sciences, College Of Osteo Med, Kirksville
2006
What Public CMS Data Show
Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
106 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 $2,352 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 $1,848 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
66 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
$514 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 โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $3,847.75 across 15 records.
By nature of payment
- Education: $2,500.00 across 2 records.
- Food and Beverage: $773.47 across 11 records.
- Travel and Lodging: $574.28 across 2 records.
Reporting-company totals (3 largest of 8)
- INTUITIVE SURGICAL, INC.: $3,131.87 across 6 records.
- Davol Inc.: $291.48 across 2 records.
- Ethicon Inc.: $173.33 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
20 years (graduated 2006)
CMS Doctors and Clinicians data list 2006 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
2008
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. Pieper 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. Pieper 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 Saint Louis and Missouri
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 90% of clinicians listed under Surgery in Saint Louis, MO (2024, 92 clinicians with data). Median for this group: 175. Middle half: 92 to 288.
Fewer Medicare Part B services than 90% of clinicians listed under Surgery in Missouri (2024, 351 clinicians with data). Median for this group: 195. Middle half: 102 to 317.
Medicare-allowed amount
A lower Medicare-allowed amount than 90% of clinicians listed under Surgery in Saint Louis, MO (2024, 92 clinicians with data). Median for this group: $23,873. Middle half: $11,140 to $40,146.
A lower Medicare-allowed amount than 95% of clinicians listed under Surgery in Missouri (2024, 351 clinicians with data). Median for this group: $23,612. Middle half: $10,620 to $45,112.
Paid by Medicare
A lower Medicare payment amount than 90% of clinicians listed under Surgery in Saint Louis, MO (2024, 92 clinicians with data). Median for this group: $18,367. Middle half: $8,320 to $31,284.
A lower Medicare payment amount than 90% of clinicians listed under Surgery in Missouri (2024, 351 clinicians with data). Median for this group: $17,905. Middle half: $8,058 to $34,751.
Medicare Part D prescriptions
More Part D prescriptions than 65% of clinicians listed under Surgery in Saint Louis, MO (2024, 107 clinicians with data). Median for this group: 40. Middle half: 21 to 100.
Close to the middle for clinicians listed under Surgery in Missouri (2024, 367 clinicians with data). Median for this group: 66. Middle half: 28 to 138.
Part D drug cost
A higher Part D drug cost than 70% of clinicians listed under Surgery in Saint Louis, MO (2024, 107 clinicians with data). Median for this group: $179. Middle half: $70 to $838.
Close to the middle for clinicians listed under Surgery in Missouri (2024, 367 clinicians with data). Median for this group: $376. Middle half: $114 to $1,301.
239 active clinicians are listed under Surgery with a practice address in Saint Louis, MO (715 in Missouri).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Saint Louis
10% of these 239 clinicians have the CMS telehealth indicator.
49% of these 239 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 decreased 82% from 148 in 2020 to 27 in 2024.
- 2020: 148
- 2021: 225
- 2022: 219
- 2023: 153
- 2024: 27
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Medicare-allowed amount
Medicare-allowed amount decreased 89% from $21,995 in 2020 to $2,352 in 2024.
- 2020: $21,995
- 2021: $29,257
- 2022: $28,038
- 2023: $16,881
- 2024: $2,352
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Paid by Medicare
Paid by Medicare decreased 89% from $16,928 in 2020 to $1,848 in 2024.
- 2020: $16,928
- 2021: $23,363
- 2022: $22,455
- 2023: $13,486
- 2024: $1,848
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 13 in 2022 to 66 in 2024.
- 2022: 13
- 2023: 47
- 2024: 66
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30-day fills
30-day fills went from 13 in 2022 to 66 in 2024.
- 2022: 13
- 2023: 47
- 2024: 66
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Part D drug cost
Part D drug cost went from $240 in 2022 to $514 in 2024.
- 2022: $240
- 2023: $795
- 2024: $514
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $136.59 in 2019 to $3,847.75 in 2025.
- 2019: $136.59
- 2022: $235.31
- 2023: $87.29
- 2024: $4,289.65
- 2025: $3,847.75
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 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): 15 records totaling $3,847.75.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| INTUITIVE SURGICAL, INC. |
Education
In-kind items and services
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DAVINCI XI | General | $1,500.00 |
| INTUITIVE SURGICAL, INC. |
Education
In-kind items and services
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DAVINCI XI | General | $1,000.00 |
| INTUITIVE SURGICAL, INC. |
Travel and Lodging
In-kind items and services
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Da Vinci Surgical System | General | $410.78 |
| Davol Inc. |
Food and Beverage
In-kind items and services
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Phasix Mesh | General | $171.59 |
| INTUITIVE SURGICAL, INC. |
Travel and Lodging
In-kind items and services
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Da Vinci Surgical System | General | $163.50 |
| Acera Surgical, Inc. |
Food and Beverage
In-kind items and services
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Restrata Wound Matrix | General | $158.10 |
| Ethicon Inc. |
Food and Beverage
In-kind items and services
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EVARREST | General | $139.58 |
| Davol Inc. |
Food and Beverage
In-kind items and services
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Phasix Mesh | General | $119.89 |
| Ethicon Inc. |
Food and Beverage
In-kind items and services
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Echelon; Endopath | General | $33.75 |
| Ceribell, Inc. |
Food and Beverage
Cash or cash equivalent
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POCKET EEG DEVICE | General | $31.34 |
| INTUITIVE SURGICAL, INC. |
Food and Beverage
In-kind items and services
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Da Vinci Surgical System | General | $29.59 |
| INTUITIVE SURGICAL, INC. |
Food and Beverage
In-kind items and services
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Da Vinci Surgical System | General | $28.00 |
| TELA Bio, Inc. |
Food and Beverage
In-kind items and services
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OviTex Reinforced Bioscaffold With Permanent Polymer (OviTex) | General | $22.84 |
| Integra LifeSciences Corporation |
Food and Beverage
In-kind items and services
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Integra | General | $20.86 |
| Solventum Corporation |
Food and Beverage
Cash or cash equivalent
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V.A.C.ULTA | General | $17.93 |
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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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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27 | 18 | $171.00 | $87.10 |
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 |
|---|---|---|---|---|---|
| Oxycodone Hcl | Oxycodone Hcl | 46 | 216 | $184.23 | 41 |
| Gavilyte-C | Peg3350/Sod Sulf,bicarb,cl/Kcl | 20 | 20 | $329.83 | 20 |
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
Self-certified to NPPES: 2023-12-05NUCC 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: 2086S0102X
A surgeon with expertise in the management of the critically ill and postoperative patient, particularly the trauma victim, who specializes in critical care medicine diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.
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.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - GENERAL SURGERY
I20081106000028
MO
8527127547
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
Mercy Clinic Trauma And General Surgery Llc
621 S New Ballas Rd, Saint Louis, MO 631418261
Phone: 3145696440
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Surgery
Doctor of Medicine (M.D.)
Nurse Practitioner - Acute Care
Surgery
Doctor of Medicine (M.D.)
Surgery - Trauma Surgery
Doctor of Osteopathic Medicine (D.O.)
Surgery
Doctor of Osteopathic Medicine (D.O.)
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 621 S NEW BALLAS RD STE 560A, SAINT LOUIS, MO 631418261 (Tel: 3142516440)
Registered at 621 S NEW BALLAS RD STE 560A, SAINT LOUIS, MO 631418261 (Tel: 3142516440)
Surgery (license number reported to NPPES: MO 2008011543)
Registered at 1225 S GRAND BLVD, SAINT LOUIS, MO 631041016 (Tel: 3149774440)
Registered at 1008 S SPRING AVE STE 1605, SAINT LOUIS, MO 631102520 (Tel: 3149774717)
Surgery (license number reported to NPPES: MO 2008011543)
NPI status registered as active in NPPES database
Registered at 3635 VISTA AVE, SAINT LOUIS, MO 631102539 (Tel: 3145778802)
Registered at 3533 DUNN RD, SUITE 210, FLORISSANT, MO 630336761 (Tel: 3149212250)
Recorded as MATTHEW PIEPER, D.O.
Surgery (license number reported to NPPES: MO 2008011543)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Surgery Specialists in Saint Louis
- Dr. Ryan Neff, MD
- Dr. Roger Vardeleon, MD
- Dr. Alison Karadjoff, DO
- Dr. Victoria Gershuni, MD
- Dr. John Eagon, MD
- Dr. Felicia Zhang, MD
Mailing Address
621 S New Ballas Rd Ste 560a
Saint Louis, MO 631418261
Phone: 3142516440