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

Theresa Ong Liu Dumlao, MD

Individual provider Hematology & Oncology Physician · NPI 1043477441

Theresa Ong Liu Dumlao, MD practises Hematology/Oncology in Gilbert, Arizona. Qualified in 1993, 33 years ago. Practices with Banner Cancer Center Specialists LLC, a 338-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Alabama, Arizona and Texas.

Years since qualifying
33
Licensed in
AL, AZ, TX
In the registry since
2008
Specialties on file
4
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

2946 E Banner Gateway Dr Ste 450
Gilbert, AZ 85234-2165
Phone: (480) 256-6444
Fax: (480) 256-3359
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2946 E Banner Gateway Dr, Gilbert, AZ 85234-2165 — (256) 466-0071

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 32590 (AZ)
Hematology & Oncology Physician Taxonomy 207RH0003X · Licence P0083 (TX)
Hematology (Internal Medicine) Physician Taxonomy 207RH0000X · Licence 25912 (AL)
Medical Oncology Physician Taxonomy 207RX0202X · Licence 25912 (AL)

Record details

NPI number1043477441
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 22, 2008
Last updated in NPPESAugust 11, 2025

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolOTHER
Graduated 1993 (33 years in practice)
Group practice Banner Cancer Center Specialists Llc — 338 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 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 patients371
Services billed 758 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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 $85 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 Cancer Center Specialists LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 338 clinicians in the practice; 12 are shown here.

Other providers in Gilbert