MRI Certification: ARRT, ARMRIT & California Requirements
To work as an MRI tech in California, you need both a national certification and California state recognition. Here's exactly how each pathway works.
Why Certification Matters
In California, you cannot legally practice as an MRI technologist without proper state recognition from the CDPH Radiologic Health Branch. That state recognition, in turn, requires you to hold a recognized national certification (ARRT or ARMRIT). Employers also require certification before hiring - it's not optional.
Certification also matters for long-term career mobility. ARRT and ARMRIT credentials are recognized across most US states, meaning your California certification opens opportunities to work in other states if you ever relocate or pursue travel MRI assignments.
Quick Comparison: ARRT vs ARMRIT
| Factor | ARRT MRI | ARMRIT |
|---|---|---|
| Credentialing body | American Registry of Radiologic Technologists | American Registry of MRI Technologists |
| Prior credential required | Yes - primary ARRT credential (e.g., R, RT) | No - high school diploma + prereqs |
| Typical timeline from scratch | 2–4 years (primary credential + MRI add-on) | 12–18 months |
| Best for | Existing ARRT-credentialed techs | Career changers / new entrants |
| California CDPH recognition | Yes | Yes |
| States where accepted | All US states | 40+ states including California |
ARRT MRI Pathway
ARRT (American Registry of Radiologic Technologists) offers MRI as a post-primary certification. This means you must already hold a primary ARRT credential - most commonly Radiologic Technology (R) - before you can pursue the ARRT MRI certification.
The primary credential typically requires a 2-year associate degree program in radiologic technology, followed by passing the ARRT registry exam. Then, to add MRI, you complete an MRI training component (clinical hours + didactic education) and pass the ARRT MRI exam.
This pathway is best suited for people who are already in the radiology field or who want the credential that opens the most doors (including multiple imaging modalities). It's a longer road from scratch but produces a deeply versatile credential.
Complete ARRT MRI guide →ARMRIT Pathway
ARMRIT (American Registry of Magnetic Resonance Imaging Technologists) offers a standalone MRI credential that does not require prior radiology training. This is the pathway used by most ARMRIT-based certificate programs in California, including programs of 12–18 months duration.
ARMRIT requires completion of an accredited MRI training program, documentation of supervised clinical hours (~750–1,000+), and passing the ARMRIT exam. The credential is accepted by California employers and CDPH, and is recognized in 40+ states.
For career changers without a radiology background, ARMRIT is almost always the better choice - faster, less expensive (shorter program), and sufficient for California practice.
Complete ARMRIT guide →California State Requirements (CDPH)
After passing your national exam (ARRT or ARMRIT), you must apply to the California Department of Public Health (CDPH) Radiologic Health Branch for state recognition before practicing as an MRI technologist in California. This is a separate step from national certification.
California uses a CRT (Certified Radiologic Technologist) framework that includes MRI. The application process involves submitting your national certification documentation, application fees, and other required materials to CDPH.
California licensing requirements (full guide) →Clinical Hours & Exam Prep
Both ARRT and ARMRIT require a minimum number of supervised clinical hours before exam eligibility. Most programs provide these hours through affiliated clinical sites (hospitals, outpatient imaging centers). The typical range is 750–1,000+ supervised hours - verify the exact requirement with your certification body and program.
Exam prep involves reviewing MRI physics, patient safety (especially regarding magnetic hazards and implant screening), image quality, anatomy, and clinical protocols. Most programs include exam prep as part of the curriculum. Pass rates at well-run programs are generally high - ask any school you're considering for their first-time exam pass rate.
FAQ
Do I need ARRT or ARMRIT to work in California?
You need one of the two - ARRT MRI or ARMRIT - plus California CDPH state recognition. Both are legally valid for California practice. Most career changers use ARMRIT (faster, no prior degree). Those already holding ARRT primary credentials usually add ARRT MRI.
How many clinical hours do I need?
Approximately 750–1,000+ supervised clinical hours depending on which credential you're pursuing. Verify the exact requirement at ARMRIT.org or ARRT.org - these are the authoritative sources and numbers can change.
How long does the CDPH application process take?
Processing times vary and CDPH doesn't publish guaranteed timelines. Factor in several weeks to months. Some techs work under a limited permit while their application is processed. Confirm current processing times directly with the CDPH Radiologic Health Branch.
Do I need to renew my MRI certification?
Yes. Both ARRT and ARMRIT require continuing education (CE) and periodic renewal. ARRT uses a Continuing Qualifications Requirements (CQR) program. ARMRIT has its own CE requirements. Verify current renewal terms at each credentialing body's website.