Rebecca Mahon, PHD. DABR
Rebecca Mahon, PHD. DABR is a Radiological Physics Physician in Springfield, IL, registered under NPI 1003774050.
Getting there
Here is what surrounds this office in Springfield, based on OpenStreetMap data collected Oct 3, 2026. Parking is available about 427 ft away. The nearest transit stop is 471 ft away, served by Rutledge @ SIU School of Medicine. If you arrive early, there is a coffee shop 0.34 mi away.
Getting here and what is nearby
Transit Dodge & 1st/Rutledge 69 ft ~1 min
Parking 255 ft ~1 min
Transit Dodge & Rutledge 330 ft ~2 min
Parking Heritage Health Visitor Parking 352 ft ~2 min
Parking 427 ft ~2 min
Transit Rutledge @ SIU School of Medicine 471 ft ~2 min
Coffee Yellow Bird Coffee House 713 ft ~3 min
1001 North 1st Street, Springfield 62702
Mo-Fr 07:00-12:00
Restaurant Potbelly 988 ft ~4 min
228 West Miller Street, Springfield 62702
Mo-Su 06:30-21:00
Coffee Coffee Bar 0.34 mi ~7 min
Restaurant China King 0.34 mi ~7 min
120 North Grand Avenue West, Springfield 62702
Mo-Th 10:30-22:00; Fr-Sa 10:30-23:00
Grocery County Market 0.36 mi ~8 min
210 East Carpenter Street, Springfield 62702
Mo-Su 06:00-23:00
Restaurant Dew Chilli Parlor Pub & Grill 0.38 mi ~8 min
301 North Grand Avenue West, Springfield 62702
Mo-Fr 11:00-20:00; Sa 12:00-20:00
Convenience Qik-n-EZ 0.46 mi ~10 min
430 North Grand Avenue East, Springfield 62702
24/7
Gas station Qik-N-EZ 0.47 mi ~10 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 1691 | IL | Radiological Physics Physician primary |
This provider holds licence 1691 issued in IL. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Radiological Physics covers
A radiological physicist deals with the diagnostic and therapeutic applications of roentgen rays, gamma rays from sealed sources, ultrasonic radiation and radio-frequency radiation, as well as the equipment associated with their production and use, including radiation safety. NUCC Health Care Provider Taxonomy, code 2085R0205X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003774050 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 9, 2026 |
| Last updated | Jan 9, 2026 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | PHD. DABR |
| Practice address |
701 N 1ST ST Springfield, IL 62781 (217) 788-3000 |
| Mailing address |
ATTENTION: RADIATION ONCOLOGY P.O. BOX 19248 Springfield, IL 62794 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 7 | 7 | 4 | 0 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 5 | 7 | 8 | 0 | 1 |
Sum = 50 · next multiple of 10 = 50 · check digit = 0 · actual last digit = 0
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.