Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Madalyn Elaine Guelker, PA-C

Individual provider Dermatology Physician · NPI 1225781925

Madalyn Elaine Guelker, PA-C is a Physician Assistant in Corpus Christi, Texas. Graduated from University of Texas Medical School at San Antonio in 2019, 7 years ago. Practices with South Texas Dermatology PLLC, a 13-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
7
Trained at
University of Texas Medical School at San Antonio
Licensed in
TX
In the registry since
2022
What do these letters mean?
PA-C — Physician Assistant, Certified
A physician assistant who holds current national certification.

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Practice location Address checks out

4141 S Staples St Ste 300
Corpus Christi, TX 78411-0002
Phone: (361) 882-5560
Fax: (361) 882-6011
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Dermatology Physician (primary) Taxonomy 207N00000X · Licence PA13805 (TX)

Record details

NPI number1225781925
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA-C
Sole proprietorNo
NPI enumeratedFebruary 2, 2022
Last updated in NPPESFebruary 2, 2022
Certification dateFebruary 2, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolUNIVERSITY OF TEXAS MEDICAL SCHOOL AT SAN ANTONIO
Graduated 2019 (7 years in practice)
Group practice South Texas Dermatology Pllc — 13 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients489
Services billed 3,376 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $1,495 82 payments · a meal or drink at a meeting or visit, not a fee
Education $88 2 payments · educational material or training, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Colleagues at South Texas Dermatology PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in Corpus Christi