Colorado Radiologic Technologist License Requirements — What You Need to Know

As of May 2026, Colorado does not appear to require individually credentialed radiologic technologists holding active ARRT or NMTCB certification to obtain a separate state license or registration to practice. Colorado’s radiation oversight framework is built around specialty operator registrations administered by the CDPHE X-Ray Certification Unit rather than individual licensing of fully credentialed RTs.

For travel RTs and relocating technologists, this means no individual Colorado RT license application was identified in CDPHE sources reviewed, and no state processing timeline applies at the individual level for ARRT/NMTCB holders. The practical compliance focus in Colorado is on employer credentialing standards and — for technologists working in limited-scope or specialty operator roles — understanding which CDPHE registrations apply to their practice.

Colorado Employers Still Credential Independently

The absence of an individual state RT license requirement in Colorado does not mean there are no credentialing requirements for working RTs. Employers and facilities in Colorado set their own credentialing standards independently of the state framework:

• Most hospitals and imaging centers require ARRT certification as a condition of employment or staffing regardless of what CDPHE requires at the state level
• Fluoroscopy privileges may require internal competency review at the facility level, separate from any state registration requirement
• Staffing agencies may still refer to a Colorado “license” in contracts or credentialing checklists even though Colorado does not issue a general RT license — they typically mean ARRT certification or employer credentialing compliance
• Confirm requirements with your specific employer or agency before assuming that the absence of a state license means no documentation is needed

What Makes Colorado Different

Based on CDPHE sources reviewed May 2026, Colorado does not appear to require a separate individual state license for fully credentialed radiologic technologists. Where most states issue individual state licenses or certifications that must be renewed separately from national credentials, Colorado’s radiation regulatory framework does not appear to impose an equivalent individual licensing obligation on ARRT- or NMTCB-credentialed technologists. The state instead focuses its regulatory structure on specialty operator categories — Limited Scope Operators, Fluoroscopy Operators, and Bone Densitometry Operators — who practice outside the scope of full national credentialing.

This structure has important practical implications for travel RTs: fewer state-level compliance steps, no state application fee for ARRT holders, and no state renewal cycle to track independently. Employer and facility credentialing standards still apply.

For ARRT- and NMTCB-Credentialed Radiologic Technologists

Based on CDPHE sources reviewed May 2026, active ARRT or NMTCB certification is recognized by Colorado as exempting technologists from the state registration requirements that apply to limited-scope and specialty operators. This means:

• No individual Colorado RT license application was identified in CDPHE sources reviewed for ARRT/NMTCB holders
• No individual application fee applies to ARRT/NMTCB holders at the individual level
• No individual state renewal cycle was identified for ARRT/NMTCB holders — no state renewal system exists for them
• No state CE requirement was identified for ARRT/NMTCB holders — state CE obligations apply only to LSO registrants and other specialty operators
• Employer credentialing standards apply independently — most Colorado hospitals and imaging facilities require active ARRT certification as a hiring or credentialing standard regardless of what CDPHE requires at the state level

Colorado Specialty Operator Registrations

Colorado’s CDPHE X-Ray Certification Unit administers state registrations for operators who practice outside the scope of full ARRT/NMTCB credentials. These registrations are distinct from a general RT license and apply to specific limited or specialty practice categories.

Limited Scope Operator (LSO)

A Limited Scope Operator registration is required for individuals who perform a limited scope of diagnostic x-ray procedures without holding full ARRT radiography credentials. Per CDPHE sources reviewed May 2026:

• Education: minimum 80 hours of classroom didactic training plus specific clinical minimum exam logs
• Examination: ARRT-administered limited scope examination is used as the Colorado state-required test
• Application fee: CDPHE sources indicate approximately $60 — verify current fee with CDPHE before submitting
• Renewal: biennial (every 2 years); $60 renewal fee per CDPHE sources reviewed May 2026
• CE: 24 CEUs per 2-year renewal period; topics must relate to radiation safety, radiography, and adjacent imaging fields per CDPHE renewal materials reviewed May 2026; CE credits are not automatically reported to CDPHE — attach evidence of CE completion with your renewal application
• Renewal forms: Form R-90 (LSO renewal)

Fluoroscopy Operator (FO)

A Fluoroscopy Operator registration is required for individuals who operate fluoroscopic equipment without holding full ARRT credentials in fluoroscopy. Per CDPHE sources reviewed May 2026:

• Education: minimum 40 hours of fluoroscopy-specific radiation education training
• Application fee: CDPHE sources indicate approximately $60 — verify current fee with CDPHE before submitting
• Renewal: biennial (every 2 years); $60 renewal fee per CDPHE sources reviewed May 2026

Bone Densitometry Operator (BDO)

A Bone Densitometry Operator registration is required for individuals performing bone density studies without full ARRT credentials. Per CDPHE sources reviewed May 2026:

• Education: minimum 30 hours of didactic training, or active ISCD credential plus 9 hours of safety training
• Application fee: CDPHE sources indicate approximately $60 — verify current fee with CDPHE before submitting
• Renewal: triennial (every 3 years); $60 renewal fee per CDPHE sources reviewed May 2026
• Renewal forms: Form R-82 (BDO renewal)

Provisional Mammographer

A separate provisional mammographer registration exists for individuals who do not yet hold full ARRT mammography credentials. Mammography practice is additionally governed by federal MQSA requirements. Verify current provisional mammographer registration requirements directly with CDPHE.

Practical Notes for Working Radiologic Technologists

• No individual state license identified does not mean no requirements. Colorado facilities and employers set their own credentialing standards independently of what CDPHE requires. Most will require active ARRT certification as a condition of employment or staffing regardless of the state framework. Confirm requirements with your specific employer or staffing agency before assuming no documentation is needed.
• Travel RTs: fewer state-level compliance steps. Without an individual state license application, fee, or processing timeline to manage, Colorado assignments have fewer compliance steps than licensed states like Ohio, Texas, or California. Your ARRT certification and agency credentialing are the primary focus.
• If your assignment involves fluoroscopy, confirm your credential scope. ARRT-credentialed RTs with active fluoroscopy scope are generally covered under the CDPHE exemption framework. If you are not credentialed for fluoroscopy through ARRT, a Colorado Fluoroscopy Operator registration may be required. Verify with your employer before performing fluoroscopy independently.
• LSO registrants: CE credits are not auto-reported to CDPHE. If you hold a Colorado LSO registration, CE related to radiography and radiation safety counts toward your 24-CEU renewal requirement per CDPHE renewal materials — but you must attach evidence of CE completion with your renewal application. CDPHE does not receive automatic reporting from ARRT or other CE tracking systems.
• Watch for legislative changes. Colorado’s current regulatory framework could change if individual RT licensure is enacted. If you work in Colorado regularly, monitor state-level legislative developments. Legislative status last checked: May 23, 2026.
• No interstate compact — but no state license needed either. No MRTC participation was identified in CDPHE materials reviewed May 2026. For ARRT holders, the absence of a compact is less consequential because no individual Colorado license exists to compact.

Related Pages

• Georgia Radiologic Technologist Requirements
• North Carolina Radiologic Technologist Requirements
• Washington Radiologic Technologist Certification Requirements
• Radiologic Technologist Licensing by State — Complete Guide

Frequently Asked Questions

Do I need a Colorado state license to work as a radiologic technologist?

No individual state RT license was identified as required for ARRT- or NMTCB-credentialed radiologic technologists in Colorado as of May 2026. Colorado’s CDPHE sources indicate no individual state RT license was identified in CDPHE sources reviewed May 2026 for fully credentialed RTs — active ARRT or NMTCB certification is recognized as the operative professional credential. Source: Colorado CDPHE X-Ray Machine Operators and Technologists

Does Colorado require ARRT certification for radiologic technologists?

Based on CDPHE sources reviewed May 2026, active ARRT or NMTCB certification is recognized as exempting technologists from the state registration requirements that apply to limited-scope and specialty operators. ARRT certification is not mandated by Colorado as an individual license — it is the recognized national credential that aligns with Colorado’s regulatory framework. Most Colorado employers require ARRT certification as a condition of employment independently. Source: Colorado CDPHE X-Ray Machine Operators and Technologists

Can I work in Colorado as a travel RT without a state license?

Based on CDPHE sources reviewed May 2026, no individual state RT license was identified as required for ARRT/NMTCB-credentialed technologists practicing standard medical radiography in Colorado. Confirm employer and facility credentialing requirements with your staffing agency before starting any Colorado assignment. Source: Colorado CDPHE X-Ray Machine Operators and Technologists

What is a Colorado Limited Scope Operator registration?

A Limited Scope Operator (LSO) registration is a Colorado CDPHE state registration for individuals who perform a limited scope of diagnostic x-ray procedures without holding full ARRT radiography credentials. LSO registration requires minimum 80 hours of didactic training, passage of the ARRT-administered limited scope exam, and biennial renewal with 24 CEUs. Source: Colorado CDPHE X-Ray Machine Operators and Technologists

What regulation governs radiologic technology practice in Colorado?

Colorado’s X-ray operator registration requirements are governed by 6 CCR 1007-1 Part 2 — Colorado Radiation Control Regulations, administered by the CDPHE X-Ray Certification Unit. Source: Colorado CDPHE X-Ray Machine Operators and Technologists

How do I contact Colorado’s X-Ray Certification Unit?

Colorado CDPHE X-Ray Certification Unit: Phone 303-692-3448; Email cdphe.hmxraycomments@state.co.us. Source: Colorado CDPHE X-Ray Machine Operators and Technologists