Healthcare Credential
How to Verify a Radiation Therapist Credential
Radiation therapists deliver therapeutic radiation to cancer patients under radiation oncology supervision. The national credential is the ARRT R.T.(T), and most states require a state radiologic technology license. Here is how to verify radiation therapist credentials for clinical hiring and credentialing.
Quick answer
The primary radiation therapist credential is R.T.(T) — Registered Technologist in Radiation Therapy — from ARRT. Verify at arrt.org. Most states also require a state radiologic technology license. Confirm Active status on both. Do not confuse the radiation therapist (R.T.(T)) with a medical dosimetrist (CMD) — these are distinct roles.
ARRT R.T.(T) credential verification
The American Registry of Radiologic Technologists (ARRT) administers the R.T.(T) — Registered Technologist in Radiation Therapy — as a primary credential. Eligibility requires graduation from a JRCERT-accredited radiation therapy program and passing the ARRT Radiation Therapy examination.
Verify ARRT credentials at: arrt.org → Verify Credentials (search by name or registration number). Verification confirms:
- All ARRT credentials held (R.T.(T) and any additional specialties)
- Active / Inactive / Expired status
- Renewal cycle standing
ARRT credentials require 24 continuing education credits every two years for renewal. Confirm the renewal cycle is current.
Radiation therapist vs. medical dosimetrist
These are two distinct roles in radiation oncology that are sometimes confused:
| Role | Credential | Function |
|---|---|---|
| Radiation Therapist | ARRT R.T.(T) | Delivers radiation treatments to patients at the linac; patient-facing bedside role |
| Medical Dosimetrist | CMD (Medical Dosimetrist Certified) | Plans and calculates radiation treatment plans; physics/planning role, not primarily patient-facing |
If hiring a medical dosimetrist, verify the CMD credential through the Medical Dosimetrist Certification Board (MDCB) at mdcb.org, not through ARRT.
State radiologic technology licensing
Most states require state licensing for radiation therapists, typically under the state's radiologic technology licensing framework. Verify the state license in the applicable state's licensing portal.
Selected state licensing portals
- California: CDPH Radiologic Health Branch — cdph.ca.gov; Radiation Therapy Technologist certification
- Texas: Texas Medical Board — lookup.tmb.state.tx.us; Medical Radiologic Technologist (radiation therapy specialty)
- Florida: Florida DBPR — myfloridalicense.com; Radiologic Technologist (Radiation Therapy)
- New York: NYS Office of the Professions — op.nysed.gov/verification; Radiologic Technology (Radiation Therapy)
- Pennsylvania: PA PALS — pals.pa.gov; Radiologic Technologist (Radiation Therapy)
Verification checklist
- 1. Confirm the candidate holds ARRT R.T.(T) — verify at arrt.org with Active status
- 2. Confirm ARRT CE renewal cycle (24 credits per 2-year cycle) is current
- 3. Verify state radiologic technology or radiation therapy license in the applicable state
- 4. Review disciplinary history on the state license record
- 5. For dosimetry roles: verify CMD credential at mdcb.org — distinct from ARRT R.T.(T)
- 6. Confirm program accreditation from JRCERT before accepting educational credentials
Verify radiation therapy program accreditation
Radiation therapy programs must be accredited by JRCERT (Joint Review Committee on Education in Radiologic Technology). ARRT credential eligibility requires graduation from a JRCERT-accredited radiation therapy program. Use VerifyED to confirm accreditation status.
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