Madison Marshall , PA-C
Physician Assistant β’ Mcallen, TX
501 Savannah Ave
Mcallen, TX 785032929
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
Practice Location & Contact Primary Location
501 Savannah Ave
Mcallen, TX 785032929
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: Texas Oncology Pa. 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
2023
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Open Payments general payments, program year 2025
All general payments: $1,092.72 across 42 records.
By nature of payment
- Food and Beverage: $992.73 across 41 records.
- Education: $99.99 across 1 record.
Reporting-company totals (3 largest of 25)
- Regeneron Pharmaceuticals, Inc.: $190.06 across 4 records.
- Janssen Pharmaceuticals, Inc: $166.85 across 4 records.
- Novartis Pharmaceuticals Corporation: $70.82 across 3 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
3 years (graduated 2023)
CMS Doctors and Clinicians data list 2023 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
2022
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, βDoes your provider accept Medicare as full payment?β
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Madison Marshall 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 Madison Marshall 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 Mcallen and Texas
144 active clinicians are listed under Physician Assistant with a practice address in Mcallen, TX (11,008 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Mcallen
6.2% of these 144 clinicians have the CMS telehealth indicator.
45.8% of these 144 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.
-
Industry payments (Open Payments)
Industry payments (Open Payments) went from $249.02 in 2024 to $1,092.72 in 2025.
- 2024: $249.02
- 2025: $1,092.72
Sources: CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· 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 β December 31, 2025): 42 records totaling $1,092.72.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
LIBTAYO | General | $121.86 |
| Janssen Pharmaceuticals, Inc |
Education
In-kind items and services
|
DARZALEX | General | $99.99 |
| Sanofi and Genzyme US Companies |
Food and Beverage
In-kind items and services
|
AYVAKIT | General | $37.21 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
|
Fabhalta | General | $33.88 |
| Daiichi Sankyo Inc. |
Food and Beverage
In-kind items and services
|
DATROWAY | General | $29.76 |
| Daiichi Sankyo Inc. |
Food and Beverage
In-kind items and services
|
Vanflyta | General | $29.50 |
| Deciphera Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
|
QINLOCK | General | $29.23 |
| Bayer Healthcare Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
|
Nubeqa | General | $28.41 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
TALVEY | General | $27.86 |
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
LYNOZYFIC | General | $27.38 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
ORILISSA | General | $27.22 |
| Takeda Pharmaceuticals U.S.A., Inc. |
Food and Beverage
In-kind items and services
|
NINLARO | General | $27.13 |
| Bayer Healthcare Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
|
Nubeqa | General | $26.80 |
| Menarini Silicon Biosystems, Inc. |
Food and Beverage
Cash or cash equivalent
|
Cellsearch | General | $24.85 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
IMFINZI | General | $24.19 |
| Bristol Myers Squibb Company |
Food and Beverage
Cash or cash equivalent
|
OPDIVO | General | $23.26 |
| Evofem Biosciences, Inc. |
Food and Beverage
In-kind items and services
|
Phexxi | General | $23.04 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
|
SCEMBLIX | General | $22.64 |
| pharmaand GmbH |
Food and Beverage
In-kind items and services
|
Rubraca | General | $22.23 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
RYBREVANT | General | $22.18 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
|
KEYTRUDA | General | $22.15 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
ELAHERE | General | $22.13 |
| Exeltis, USA Inc. |
Food and Beverage
In-kind items and services
|
SLYND | General | $21.96 |
| Sumitomo Pharma America, Inc. |
Food and Beverage
In-kind items and services
|
GEMTESA | General | $21.68 |
| Bristol Myers Squibb Company |
Food and Beverage
Cash or cash equivalent
|
BREYANZI | General | $21.03 |
(top 25 shown)
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2024-02-28NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20250716004275
TX
9335681691
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
Texas Oncology Pa
925 Gessner Rd, Houston, TX 770242843
Phone: 7134671722
Texas Oncology Pa
501 W Medical Ctr Blvd, Webster, TX 775984219
Phone: 2813327505
Texas Oncology Pa
6807 Emmett F Lowry Expy, Texas City, TX 775912548
Phone: 4099388600
Texas Oncology Pa
7848 Gateway Blvd E, El Paso, TX 799151815
Phone: 9155991313
Texas Oncology Pa
Po Box, Dallas, TX 753911242
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant
Physician Assistant
Physician Assistant
Physician Assistant
Physician Assistant
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 501 SAVANNAH AVE, MCALLEN, TX 785032929 (Tel: 9566657049)
Registered at 501 SAVANNAH AVE, MCALLEN, TX 785032929 (Tel: 9566302400)
Recorded as MADISON MARSHALL, PA-C
Physician Assistant
NPI status registered as active in NPPES database
Registered at 1201 W UNIVERSITY DR, EDINBURG, TX 785392909 (Tel: 9566657049)
Registered at 1201 W UNIVERSITY DR, EDINBURG, TX 785392909 (Tel: 9566657049)
Recorded as MADISON MARSHALL, PA-S
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Mcallen
- Jacqueline Trauscht, PA-C
- Oscar Sandoval, PA
- Megan Chavez, PA-C
- Rosalva Ruiz, PA-C
- Ninfa Perez, PA
- Carolina Mendez, PA-C
Mailing Address
501 Savannah Ave
Mcallen, TX 785032929
Phone: 9566302400