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

Diana Alma Santiago, MD

Individual provider Specialist · NPI 1073552196

Diana Alma Santiago, MD practises Radiation Oncology in Newnan, Georgia. Graduated from Medical University of South Carolina College of Medicine in 1992, 34 years ago. Practices with Therapeutic Radiation Oncology, PC, an 8-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Georgia.

Years since qualifying
34
Trained at
Medical University of South Carolina College of Medicine
Licensed in
GA
In the registry since
2006
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

745 Poplar Rd
Newnan, GA 30265-1618
Phone: (770) 400-4700
Fax: (770) 400-4096
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1255 Highway 54 W, Fayetteville, GA 30214-4526 — (770) 719-5850

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence 42421 (GA)
Specialist Taxonomy 174400000X · Licence 42421 (GA)

Record details

NPI number1073552196
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 5, 2006
Last updated in NPPESDecember 27, 2021
Certification dateDecember 27, 2021

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolMEDICAL UNIVERSITY OF SOUTH CAROLINA COLLEGE OF MEDICINE
Graduated 1992 (34 years in practice)
Group practice Therapeutic Radiation Oncology, Pc — 8 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 patients191
Services billed 1,725 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 $75 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 Therapeutic Radiation Oncology, PC

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

Other providers in Newnan