Medical Interpreter Certification in 2026: Which Exam to Take Before CoreCHI Retires

Written & reviewed by the Quibank editorial team · Last reviewed 2026-09-29 · Editorial standards

A knowledge-only medical interpreter credential is no longer an endpoint. CCHI has announced that "Beginning January 1, 2027, CCHI will no longer award the standalone CoreCHI™ certification" — from that date it issues only CHI™ and CoreCHI-Performance™, both of which require passing a performance exam on top of the written one. If you are planning a certification path in late 2026, plan it around two exams, not one.

The second decision is made for you by the language you interpret, not by preference, and one of the available routes quietly expires. Two bodies certify healthcare interpreters nationally — CCHI and the National Board of Certification for Medical Interpreters (NBCMI) — and their language rules differ enough that for many interpreters only one of them leads to a renewable credential.

The sunset dates that actually bind you

CoreCHI-Performance™ is earned by passing the CoreCHI™ knowledge exam and then the ETOE™ (English-to-English) performance exam "within 1 (one) year (12 months)." The transition rules for people already certified split by award date: credentials awarded before January 1, 2025 stay valid four years but are renewable only until December 31, 2028; credentials awarded between January 1, 2025 and December 31, 2026 get two years from the award date to pass the ETOE™ exam and cannot be renewed as CoreCHI™ at all. December 31, 2028 is the hard deadline for every CoreCHI™ holder to have transitioned.

The practical reading for a new candidate: if you sit CoreCHI™ in the next few months, you are starting a 12-month clock, not banking a credential. Eligibility itself is modest by comparison — 18 or older, a U.S. high school diploma or GED, and "at least 40 hours of healthcare interpreter training."

Your language decides your route, and one route dead-ends

CCHI's bilingual CHI™ exam exists for "interpreters of Arabic, Mandarin, and Spanish" only. Everyone else takes the ETOE™ performance exam, which assesses interpreting skill in a monolingual English format — so CoreCHI-P™ is a genuine, renewable performance credential available in any language. That, not the sunset itself, is the substantive change: the language-neutral path stopped being knowledge-only.

NBCMI splits the same problem differently, and the difference matters more than the price. Its CMI credential is "available in six languages: Spanish, Russian, Mandarin, Cantonese, Korean, and Vietnamese." For every other language it offers the Hub-CMI, "a credential available to all interpreters, regardless of target language" — but its own handbook states that where no oral exam is available in your target language, "your Hub-CMI will expire in two years with no option" to renew, and interpreters whose Hub-CMI expires "can only restart the program once."

So if you interpret Portuguese, Haitian Creole, Somali, Karen, or any of the other languages neither body tests bilingually, the two paths are not equivalent: one ends in a renewable certification, the other in a credential with a two-year shelf life. Pricing will not tell you this — the two are within a few dollars of each other. CCHI charges $231 up front ($40 application plus a $191 CoreCHI™ exam fee) and $302 for the CHI™ or ETOE™ exam; NBCMI charges a $40 registration valid one year, $190 for the written exam, and $300 for the oral.

How the written exam is scored, and what your report will not tell you

The CoreCHI™ exam is 100 four-option multiple-choice questions over 120 minutes, of which "85 are used to calculate the score." Raw score is converted to a scale of 300 to 600 with the passing score set at 450, and that bar is criterion-referenced — set by subject-matter experts and CCHI commissioners with a psychometrician, not by a curve against other candidates. There is no percentage-correct equivalent you can aim at.

Your report also shows subscores by domain — professional responsibility and interpreter ethics, managing an interpreting encounter, healthcare terminology, the U.S. healthcare system, and cultural responsiveness — and CCHI warns against the obvious misreading: "There is no relationship between the percentages reported for the parts of the test (domains) and the overall test score," and "Your total score is not the average of your scores in domains." Domain percentages rest on few items each and are a study hint, not a diagnosis.

Useful calibration from CCHI's own statistics: in 2023 the average passing score was 507 and the average failing score 398.

The pass rates are published — and the headline figure flatters your odds

Unusually for this kind of credential, CCHI publishes exam statistics rather than leaving the number to prep vendors. In 2023 the CoreCHI™ exam was taken 1,013 times with 762 passes, a 75.2% pass rate. But that pooled figure includes candidates who go on to the Spanish, Arabic, or Mandarin CHI™ exams. Broken out, "CoreCHI™ candidates" — the interpreters of every other language, for whom no bilingual exam exists — took it 239 times and passed 142, a 66.5% rate. If you interpret a language outside the big three, the 66.5% is your number.

On the performance side the same year: ETOE™ 80.1% (151 taken, 121 passed), CHI™-Spanish 72.9% (572 of them, 417 passed), CHI™-Mandarin 70.5% (44 taken, 31 passed), CHI™-Arabic 56.1% (41 taken, 23 passed). Treat the Arabic and Mandarin rates with care — at 41 and 44 sittings, a handful of results moves them several points.

The volume figures say something about the field that no study guide mentions. Of the 8,120 credentials CCHI had issued by the end of 2023, 5,426 were CHI™-Spanish against 261 Arabic and 319 Mandarin. Healthcare interpreter certification in the United States is overwhelmingly a Spanish-language institution, and material written for "medical interpreters" generally assumes Spanish without saying so.

The 12-month clock is where candidates lose money

Retake rules are generous per attempt and unforgiving across the year. CoreCHI™ can be retaken after a 90-day wait, up to three times in a 12-month period; fail a third time and you wait a full 12 months, and from the fourth attempt onward you may sit it only once a year. The oral exams can be retaken after 90 days or in the next testing window, whichever comes first, on the same three-per-year limit.

The expensive detail is what a third oral failure costs. Fail CHI™ or ETOE™ three times and you must wait 12 months and re-take CoreCHI™ before a fourth attempt — because, as the handbook puts it, "the passing scores of the CoreCHI™ exam are valid only for 12 months." The same trap catches anyone who simply runs out of time: miss the 12-month window and you pay the CoreCHI™ fee again and sit it again, having learned nothing new. Budget the oral exam attempt inside the year you pass the written one, and note that a Prometric reschedule or cancellation costs $35 and is not refunded.

Being bilingual is not the credential — and that is the whole point

Clinical staff discover this from the liability side. On allnurses' boards, nurses describe facility rules under which a fluent nurse may speak with a patient in their own language but may not interpret for anyone else unless certified by the facility as an interpreter, and posters warn each other off informal interpreting by pointing to a hospital that was sued and paid a large settlement over the use of non-certified interpreters. The recurring advice is to check your employer's policy before helping a colleague, because the person who interpreted is the one exposed if a misunderstanding surfaces later.

The same threads sketch the pathway and the payoff more plainly than most official pages: one certified interpreter describes passing a third-party spoken-language exam through ALTA, then completing the 40-hour training, then the national written exam, then the national oral exam. Nurses there also report that some hospitals pay a bonus of a few thousand dollars a year to staff who maintain certification and agree to interpret, and that some employers cover the certification and continuing-education costs outright — worth asking about before you pay the $231 yourself.

For the written exam itself, study to CCHI's domain list rather than to a terminology deck: ethics and managing the encounter carry weight alongside terminology, and the questions are scenario-shaped — when two answers both seem defensible, the one that preserves the interpreter's role and the patient's autonomy is usually the credited one.

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