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

Dr. Matthew Alexander Stack, MD

Individual provider Infectious Disease Physician · NPI 1962994491

Dr. Matthew Alexander Stack, MD is registered under Infectious Disease in Houston, Texas. Graduated from Wayne State University School of Medicine in 2018, 8 years ago. Practices with Physician Services Corporation of Southern Illinois Inc, a 122-clinician group, works from 3 locations, accepts Medicare assignment and offers telehealth. Licensed in Indiana and Texas.

Years since qualifying
8
Trained at
Wayne State University School of Medicine
Licensed in
IN, TX
In the registry since
2018
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

6431 Fannin St # 2.112
Houston, TX 77030-1501
Phone: (713) 500-6765
Fax: (713) 500-5495
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 1120 W Michigan St, Indianapolis, IN 46202-5209 — (317) 278-2694
  • 1008 S Spring Ave, Saint Louis, MO 63110-2520 — (314) 617-3137

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence BP10082502 (TX)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X · Licence 11020118A (IN)

Record details

NPI number1962994491
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 31, 2018
Last updated in NPPESMay 19, 2024
Certification dateMay 19, 2024

Medicare enrollment

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

Medicare specialtyINFECTIOUS DISEASE
Medical schoolWAYNE STATE UNIVERSITY SCHOOL OF MEDICINE
Graduated 2018 (8 years in practice)
Group practice Physician Services Corporation Of Southern Illinois Inc — 122 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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 patients21
Services billed 54 a service is one billed item, such as a visit, a test or a procedure
Average patient age59

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 $1,020 12 payments · a meal or drink at a meeting or visit, 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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Physician Services Corporation of Southern Illinois Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 122 clinicians in the practice; 12 are shown here.

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