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

Thomas William Marston, MD

Individual provider Critical Care Medicine (Internal Medicine) Physician · NPI 1487008975

Thomas William Marston, MD practises Internal Medicine in Chandler, Arizona. Qualified in 2016, 10 years ago. Practices with Banner - University Hospital Based Physicians LLC, a 347-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Arizona.

Years since qualifying
10
Licensed in
AZ
In the registry since
2016
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1955 W Frye Rd
Chandler, AZ 85224-6282
Phone: (480) 909-3870
Fax: (602) 230-6462
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 1120 S Dobson Rd, Chandler, AZ 85286 — (480) 728-5460
  • 3555 S Val Vista Dr, Gilbert, AZ 85297-7323 — (480) 909-3870

Specialties & licences

Critical Care Medicine (Internal Medicine) Physician (primary) Taxonomy 207RC0200X · Licence 66204 (AZ)

Record details

NPI number1487008975
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 20, 2016
Last updated in NPPESDecember 6, 2024
Certification dateDecember 6, 2024

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice Banner - University Hospital Based Physicians Llc — 347 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
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 patients208
Services billed 593 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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 $227 3 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.

Colleagues at Banner - University Hospital Based Physicians LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 347 clinicians in the practice; 12 are shown here.

Other providers in Chandler