Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Romeo Ang Mandanas, MD

Individual provider Internal Medicine Physician · NPI 1114974466

Dr. Romeo Ang Mandanas, MD practises Medical Oncology in Oklahoma City, Oklahoma. Qualified in 1983, 43 years ago. Practices with Integris Ambulatory Care Corporation, a 683-clinician group and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
43
Licensed in
OK
In the registry since
2006
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

5915 W Memorial Rd Ste 200
Oklahoma City, OK 73142
Phone: (405) 773-6400
Fax: (405) 621-5441
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 18541 (OK)
Internal Medicine Physician Taxonomy 207R00000X · Licence 18541 (OK)
Hematology (Internal Medicine) Physician Taxonomy 207RH0000X · Licence 18541 (OK)
Medical Oncology Physician Taxonomy 207RX0202X · Licence 18541 (OK)

Record details

NPI number1114974466
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 30, 2006
Last updated in NPPESJune 27, 2017

Medicare enrollment

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

Medicare specialtyMEDICAL ONCOLOGY
Medical schoolOTHER
Graduated 1983 (43 years in practice)
Group practice Integris Ambulatory Care Corporation — 683 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 patients397
Services billed 1,161 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.

Travel and Lodging $2,566 3 payments · travel or lodging paid or reimbursed, such as to attend a conference
Food and Beverage $1,122 25 payments · a meal or drink at a meeting or visit, not a fee
Consulting Fee $150 1 payment
Education $141 14 payments · educational material or training, not a fee
Long term medical supply or device loan $83 1 payment · a device or supply lent for a long period, not cash

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 Integris Ambulatory Care Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 683 clinicians in the practice; 12 are shown here.

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