Marissa Casas
Physician Assistant • Mcallen, TX
6900 N 10th St Ste No4
Mcallen, TX 785043198
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
6900 N 10th St Ste No4
Mcallen, TX 785043198
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Edinburg, TX. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
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: $435.74 across 17 records.
By nature of payment
- Food and Beverage: $235.76 across 15 records.
- Education: $199.98 across 2 records.
Reporting-company totals
- Janssen Pharmaceuticals, Inc: $305.76 across 11 records.
- Amgen Inc.: $115.47 across 5 records.
- Novartis Pharmaceuticals Corporation: $14.51 across 1 record.
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).
NPI first issued
2015
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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.
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 $11.45 in 2019 to $435.74 in 2025.
- 2019: $11.45
- 2022: $430.42
- 2023: $248.35
- 2024: $449.96
- 2025: $435.74
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 · 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): 17 records totaling $435.74.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Janssen Pharmaceuticals, Inc |
Education
In-kind items and services
|
TREMFYA | General | $99.99 |
| Janssen Pharmaceuticals, Inc |
Education
In-kind items and services
|
TREMFYA | General | $99.99 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
KRYSTEXXA | General | $27.97 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
TREMFYA | General | $26.63 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
OTEZLA | General | $25.23 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
KRYSTEXXA | General | $23.86 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
TREMFYA | General | $23.84 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
KRYSTEXXA | General | $22.16 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
KRYSTEXXA | General | $16.25 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
|
COSENTYX | General | $14.51 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
TREMFYA | General | $12.32 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
TREMFYA | General | $11.54 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
TREMFYA | General | $9.03 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
TREMFYA | General | $8.26 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
TREMFYA | General | $6.41 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
TREMFYA | General | $4.04 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
TREMFYA | General | $3.71 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2020-05-04NUCC 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.
NUCC Taxonomy Code: 111N00000X
A provider qualified by a Doctor of Chiropractic (D.C.), licensed by the State and who practices chiropractic medicine -that discipline within the healing arts which deals with the nervous system and its relationship to the spinal column and its interrelationship with other body systems.
Secondary Practice Locations
918 S State Highway 336
Edinburg, TX 785394084
Phone: 9566272021
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 6900 N 10TH ST STE NO4, MCALLEN, TX 785043198 (Tel: 9566275137)
NPI status registered as active in NPPES database
Registered at 1620 E 8TH ST STE 4, WESLACO, TX 785965883 (Tel: 9562315541)
Registered at 1620 E 8TH ST STE 4, WESLACO, TX 785965883 (Tel: 9562315541)
Recorded as MARISSA CASAS
Chiropractor (license number reported to NPPES: TX 12876)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Mcallen
- Marissa Tagle, PA-C
- Ana Ortega, PA-C
- Josue Garcia, PA-C
- Gary Hamilton, PA
- Gabriela Ramirez, PA-C
- Salvador Arellano, PA
Mailing Address
1620 E 8th St Ste 4
Weslaco, TX 785965883
Phone: 9562315541