- CMC is AACN Certification Corporation's subspecialty credential for adult cardiac medicine nursing.
- The exam has 90 multiple-choice questions (75 scored, 15 unscored) in a 2-hour session.
- Passing requires 50 of 75 scored questions correct under the current cut score.
- Therapeutic Interventions carries the heaviest weight at 39% of the exam.
What CMC Certification Actually Is
CMC stands for Cardiac Medicine (Adult) certification, a nursing subspecialty credential administered by AACN Certification Corporation, the credentialing arm of the American Association of Critical-Care Nurses. It is designed for nurses who care for adult patients with cardiac medicine conditions - think heart failure, acute coronary syndromes, arrhythmias, and the therapies used to stabilize and manage them - rather than for post-surgical cardiac patients specifically.
If you have landed here wondering whether CMC is the right credential for your career path, or you have already confused it with a similarly abbreviated certification from another field, this page walks through exactly what it covers, who is eligible, and how the exam works. For a broader look at the acronym itself, see our companion piece on what CMC stands for in this context and the related explainer on CMC meaning.
Who Grants CMC Certification
AACN Certification Corporation issues the CMC credential. This is the same organization behind other critical-care nursing certifications, and CMC sits alongside a related cardiac surgery subspecialty credential in its portfolio. AACN Certification Corporation maintains the exam content, sets the passing standard, and publishes the official test plan that defines what appears on the exam.
Because AACN periodically revises its exam blueprints, it is worth confirming which version of the test plan applies to your scheduled exam date before you start studying. We break down the current domain weighting - and the version that takes effect later - in the CMC Exam Domains 2026 guide.
Who Can Sit for the Exam
CMC is not an entry-level credential. Candidates must hold an unencumbered U.S. RN or APRN license and already hold a current, nationally accredited clinical nursing specialty certification. On top of that licensure baseline, AACN requires candidates to document direct adult cardiac-care practice hours through one of two routes.
- Two-year route: 1,750 hours caring for acutely or critically ill adults within the previous two years, with at least 875 of those hours completed in the most recent year. Of the total, 875 hours must specifically involve adult cardiac patients.
- Five-year route: 2,000 qualifying adult acute/critical-care hours within the previous five years, including at least 144 hours in the latest year. Of the total, 1,000 hours must specifically involve adult cardiac patients.
Applicants must also identify a clinical supervisor or RN/physician colleague who can verify their practice hours if their application is audited. For the complete breakdown of hour categories, license requirements, and documentation tips, see the dedicated CMC Requirements 2026 guide.
Key Takeaway
Before you register, confirm you meet either the 1,750-hour/2-year or 2,000-hour/5-year practice threshold, and line up a supervisor who can vouch for those hours if audited.
Exam Format and Registration Mechanics
The CMC exam is a closed-book, computer-based test delivered at PSI test centers or through Live Remote Proctoring, giving candidates flexibility in how and where they sit for it. The exam consists of 90 multiple-choice questions - 75 scored and 15 unscored (used for statistical analysis of future versions) - administered within a 2-hour window.
Initial exam fees are $150 for AACN members and $240 for nonmembers. There is no separate application fee layered on top; the exam fee is the primary cost to budget for, though renewal later carries its own separate fees. For a full cost breakdown covering initial certification and renewal cycles, visit the CMC Certification Cost 2026 breakdown.
The Four CMC Exam Domains
The current CMC test plan, effective through November 18, 2026, organizes content into four domains. Understanding how heavily each domain is weighted should directly shape how you allocate study time.
Domain 1: Cardiovascular Conditions (23%)
Covers acute and chronic cardiac pathology - heart failure, coronary artery disease, valvular disorders, arrhythmias, and related complications in adult patients.
- Recognizing presentation patterns across cardiac diagnoses
- Distinguishing acute decompensation from chronic disease progression
Domain 2: Non-Cardiovascular Conditions (23%)
Tests knowledge of comorbid and systemic conditions that complicate cardiac care, such as renal, respiratory, or metabolic issues in the cardiac patient population.
- Understanding how non-cardiac conditions influence cardiac treatment decisions
- Prioritizing care when multiple organ systems are involved
Domain 3: Therapeutic Interventions (39%)
The largest domain by far, focused on medications, procedures, and treatment protocols used in adult cardiac medicine.
- Pharmacologic management across common cardiac diagnoses
- Procedural and device-based interventions and their nursing implications
Domain 4: Monitoring and Diagnostics (16%)
Covers hemodynamic monitoring, diagnostic testing interpretation, and lab values relevant to cardiac patients.
- Interpreting hemodynamic and telemetry data
- Correlating diagnostic results with clinical status
Note that the published weights total 101% due to rounding in AACN's own materials - a quirk worth knowing so it doesn't throw off your study math. Also important: these weights and the associated passing cut apply to the exam version effective June 1, 2022 through November 18, 2026. For exams administered on or after November 19, 2026, AACN shifts to revised weights: Cardiovascular Conditions 21%, Non-Cardiovascular Conditions 21%, Therapeutic Interventions 44%, and Monitoring and Diagnostics 14%. Therapeutic Interventions grows even further, reinforcing that it deserves the bulk of your attention regardless of which version you sit for. For the complete domain-by-domain content breakdown, see the CMC Exam Domains 2026 guide.
| Domain | Current Weight (through 11/18/2026) | Revised Weight (from 11/19/2026) |
|---|---|---|
| Cardiovascular Conditions | 23% | 21% |
| Non-Cardiovascular Conditions | 23% | 21% |
| Therapeutic Interventions | 39% | 44% |
| Monitoring and Diagnostics | 16% | 14% |
Key Takeaway
Always match your study materials to your actual exam date - the domain weights and passing cut change on November 19, 2026.
How the Exam Is Scored
Under the current test plan, passing requires answering at least 50 of the 75 scored questions correctly. The 15 unscored items are mixed in and indistinguishable from scored items during the test, so candidates should treat every question with equal seriousness. For context on how challenging this bar tends to be in practice, see our analysis in How Hard Is the CMC Exam? and the detailed numbers in CMC Pass Rate 2026: What the Data Shows, which references the 2025 first-time pass rate of 71.31% across 1,593 candidates tested that year.
For a precise, no-guesswork explanation of the passing standard and how it's calculated, read CMC Passing Score 2026: Exactly What You Need to Pass.
Keeping Your CMC Current
CMC certification is valid for 3 years. Renewal requires maintaining your qualifying RN/APRN license and base certification, plus documenting 432 adult cardiac-care practice hours across the 3-year cycle, with at least 144 hours completed in the most recent year.
To actually renew, you choose one of two paths:
- Continuing education path: Complete 25 relevant Category A Clinical Judgment CERPs. Renewal fee is $75 for members and $130 for nonmembers.
- Exam path: Retake the renewal exam instead of accumulating CERPs. Renewal fee is $125 for members and $170 for nonmembers.
Most nurses find the CERP route more manageable if they are already attending cardiac-focused continuing education throughout their practice cycle, but the exam route can be a faster option for those who prefer testing over tracking coursework.
Who Hires CMC-Certified Nurses
CMC-certified nurses typically work in cardiac step-down units, telemetry floors, cardiac medicine ICUs, and specialized heart failure or cardiology programs where patients are managed medically rather than surgically. Hospitals with dedicated cardiac care service lines, tertiary referral centers, and health systems pursuing recognition for nursing excellence often specifically value or require this subspecialty certification for staff in these units.
Because the credential signals validated expertise in exactly the conditions and interventions covered in the four domains above, it can factor into hiring preferences, unit staffing decisions, and career advancement within cardiac service lines. For a deeper look at where this credential fits into job postings and career trajectories, see the CMC Jobs overview and the ROI-focused discussion in Is the CMC Certification Worth It?. If you're curious how certification может translate into compensation, the CMC Salary Guide 2026 covers what's known about earnings related to this credential.
A Domain-Aware Way to Prepare
Generic study techniques - spaced repetition, timed practice blocks, active recall - work, but they only pay off when applied against the right content in the right proportions. Given that Therapeutic Interventions makes up 39% (rising to 44% after November 2026), it deserves the largest share of your study calendar, not an equal quarter alongside the other three domains.
Cardiovascular & Non-Cardiovascular Conditions
- Build foundational recall of cardiac diagnoses and common comorbidities
- Work practice questions covering both condition-focused domains together
Therapeutic Interventions
- Dedicate the largest study block here given its 39% (soon 44%) weight
- Drill pharmacologic and procedural scenarios until they feel automatic
Monitoring and Diagnostics
- Practice interpreting hemodynamic values and diagnostic results
- Connect diagnostic findings back to interventions from the prior weeks
Full-Length Review
- Take timed, 90-question practice sessions under exam-day conditions
- Revisit weak domains identified during practice testing
For a complete week-by-week study system with specific resource recommendations, see the CMC Study Guide 2026: How to Pass on Your First Attempt. And once you're in final review mode, the CMC Cheat Sheet 2026 condenses must-know facts into a single reference page. You can also start building exam familiarity right now with realistic practice questions at CMC Exam Prep.
Frequently Asked Questions
It signals validated, specialty-level knowledge in adult cardiac medicine nursing, which can support eligibility for certain cardiac unit roles and demonstrates commitment to the specialty. See What Is A CMC? for more on what the credential represents day to day.
The exam has 90 multiple-choice questions total - 75 scored and 15 unscored - administered within a 2-hour session.
Yes. Candidates must already hold a current, nationally accredited clinical nursing specialty certification along with an unencumbered RN/APRN license, in addition to meeting the practice-hour requirements.
The initial exam fee is $150 for AACN members and $240 for nonmembers. Renewal fees differ depending on whether you choose the CERP or exam renewal path.
Yes. The current domain weights and passing cut apply through November 18, 2026. Starting November 19, 2026, revised weights take effect, with Therapeutic Interventions increasing to 44%. Confirm which version matches your scheduled exam date before finalizing your study plan.