Delaware RT Certificate Renewal — 3-Year Term, ARRT Standard

Delaware Radiation Technologist/Technician certificates are valid for 3 years under the current regulation, expiring on the date printed on your certificate rather than a shared statewide date. See the At-a-Glance table above for the current fee and what happens if you let it lapse.

What You Need to Know About Delaware RT Certificate Renewal

Delaware’s certificate term changed with a regulatory amendment effective March 11, 2025 — the term is now 3 years, down from the 4 years some older sources, including at least one other official-looking Delaware page, still describe. If you’re planning around Delaware’s renewal cycle, use the 3-year figure and confirm directly with the Office of Radiation Control if anything you’ve read elsewhere seems to conflict with that.

The current regulation does not establish a separate Delaware CE-hour requirement for nationally credentialed certificate holders. Instead, renewal requires maintaining a current nationally recognized credential — ARRT, where applicable. This is similar in spirit to the deferential CE structure some other states use, though Delaware’s regulation doesn’t spell out a specific fallback hour requirement for technicians who aren’t nationally credentialed.

CE Requirements for Delaware RT Certificate Renewal

For nationally credentialed titleholders (the great majority of practicing RTs), Delaware’s renewal standard is maintenance of a current recognized national credential — ARRT, where applicable. There is no separate Delaware-specific CE hour count identified in the regulation for this group.

Note: The sources reviewed for this page did not identify a specific CE hour requirement, approved-provider list, or mandatory topics for technicians who are not nationally credentialed. If that applies to you, confirm current requirements directly with the Office of Radiation Control.

How to Renew Your Delaware RT Certificate

1. Watch for your renewal form — renewal forms are mailed by the Office of Radiation Control before certificate expiration and may also be requested directly
2. Confirm your national credential (such as ARRT) is current and valid
3. Pay the $50 renewal fee by check or money order — cash is not accepted
4. Submit before your certificate’s expiration date to avoid the $100 late fee

If your certificate lapses, what happens next depends on how long it’s been expired. Lapsed less than 180 days: you can still renew by presenting evidence that you previously passed an approved exam and paying the $100 late fee. Lapsed more than 180 days: you’ll need to fully re-certify — retaking the exam or showing a current national credential — and pay the re-certification fee (plus a re-examination fee if applicable). Delaware’s public certificate registry marks a certificate “Terminated” once it’s been expired 180 days.

Practical Notes for Delaware Certificate Renewal

• Don’t assume you can keep working past your expiration date. Unlike states with an explicit grace period for continued practice, Delaware’s current regulation states plainly that an expired certificate holder may not administer radiation until renewed — treat your printed expiration date as a hard stop.
• The 180-day mark matters a lot. Renewing within 180 days of expiration costs a late fee; missing that window means starting over with full re-certification. If you know you’re going to be late, don’t let it drift past six months.
• Keep your national credential current, and Delaware renewal follows naturally. Since there’s no separate Delaware CE hour count for nationally credentialed titleholders, staying in good standing with ARRT (or your applicable national body) is most of what you need to do.
• You can check your own certificate status. Delaware publishes a searchable registry (updated monthly) showing whether a certificate is Active, Expired, or Terminated — useful if you want to confirm your own status or verify someone else’s.

Relevant Statutes

• 16 DE Admin. Code 4466 — Radiation Technologists/Technicians (Certification), Sections 6.0 (Certification Process) and 7.0 (Issuing Certification), amended effective March 11, 2025
• 16 Del. C. §7406 (Chapter 74) — statutory authority for the Authority on Radiation Protection

Related Pages

• Delaware Radiologic Technologist Initial Certification — Requirements and Application
• Radiologic Technologist Licensing by State — Complete Guide

Frequently Asked Questions

How often do I need to renew my Delaware RT certificate?

Every 3 years, under the regulation as amended effective March 11, 2025. Older sources describing a 4-year term are outdated. Source: 16 DE Admin. Code 4466, Section 7.0

How many CE hours are required to renew a Delaware RT certificate?

No separate Delaware-specific hour count for nationally credentialed titleholders — the standard is that your national credential (such as ARRT) remains current and valid. Source: 16 DE Admin. Code 4466

Is there a grace period if I miss my Delaware certificate’s expiration date?

Not confirmed in the current regulation. The rule states that an expired certificate holder may not administer radiation until the certificate is renewed. Renewal remains available for up to 180 days past expiration with a $100 late fee, but that’s a renewal-eligibility window, not permission to keep practicing on an expired certificate. Source: 16 DE Admin. Code 4466, Section 7.0

What is the renewal fee for a Delaware RT certificate?

$50 when paid on time; $100 if payment is received 1–180 days after your expiration date. Source: 16 DE Admin. Code 4466, Section 6.0

What happens if my Delaware RT certificate lapses for more than 180 days?

You’ll need to fully re-certify — retaking the Authority-approved exam or showing a current national credential — and pay the re-certification fee, plus a re-examination fee if applicable. Delaware’s public registry marks the certificate “Terminated” at that point. Source: 16 DE Admin. Code 4466, Section 7.0

Who do I contact with questions about Delaware RT certificate renewal?

The Office of Radiation Control can be reached at (302) 744-4546 or by email at DHSS_DPH_RadControl@state.de.us. Source: Delaware Office of Radiation Control