- The Certified Medical Reimbursement Specialist exam has 694 required answers across 16 sections, completed within 45 calendar days of enrollment.
- The passing standard is 85% cumulative, so one weak section can sink an otherwise strong attempt.
- Exam $325 plus required $99 annual AMBA membership equals $424 before optional materials.
- The exam is online and open book, but you must use current-year coding resources.
The One-Page Snapshot
The Certified Medical Reimbursement Specialist (CMRS) credential is offered by the American Medical Billing Association (AMBA), with its Certifying Board, CBAMBA. This cheat sheet condenses what candidates most often need to confirm before and during the attempt: format, fees, passing standard, section list, and the topics that deserve the most attention. If you want the long-form version of any point, the CMRS study guide and the complete guide to all 16 content areas go deeper.
One note on naming: "CMRS" is shared by several unrelated credentials. Everything here refers only to the AMBA's Certified Medical Reimbursement Specialist, a medical billing and reimbursement credential. If you are still orienting yourself, What Is CMRS Certification? covers the basics.
Numbers to Memorize
These are the figures worth committing to memory. Everything in the table comes from AMBA's published information.
| Item | Fact |
|---|---|
| Credentialing organization | American Medical Billing Association (AMBA); Certifying Board CBAMBA |
| Exam structure | 694 required answers across 16 examination sections |
| Completion window | 45 calendar days after enrollment (not one continuous timed sitting) |
| Passing standard | 85% cumulative |
| Exam fee | $325 |
| Required membership | $99 per year (individual) |
| Initial total | $424 (exam plus membership, excluding optional materials) |
| Optional study guide | $199 regular price |
| Retakes | Two included, subject to AMBA waiting and completion rules |
| Maintenance | 15 CEUs annually, at least half through AMBA, with membership maintained |
For the full financial picture, including what the optional extras add, see the CMRS certification cost breakdown. The scoring threshold gets its own treatment in CMRS Passing Score 2026.
Format and Exam Mechanics
It is not a typical proctored test
Many certification exams are a single timed session at a testing center. The CMRS is different: it is delivered in AMBA's online student environment, it is open book, and you work through it over a 45-calendar-day window following enrollment. That changes what "preparation" means. You are not racing a clock through 694 answers in one sitting; you are managing a multi-week project.
What is and is not publicly specified
AMBA describes the exam as 694 required answers spread across 16 sections, including a Case Study section. A complete breakdown of item types, and of scored versus unscored items, is not publicly specified, so avoid trusting any source that claims to know exactly how many multiple-choice versus short-answer items appear. Likewise, no official percentage weights per section were found. The published required-answer counts are the best available guide to relative size, and they are not the same as scoring weights.
Eligibility in one line
AMBA's main credential page lists a high school diploma or equivalent plus membership, while its Rules & Requirements page says there are no prerequisites. No mandatory course or fixed work-experience hours have been verified. Membership is required either way. The nuances are laid out in CMRS Requirements 2026.
The 16 Sections at a Glance
The official sections double as the exam's domains. They fall naturally into four clusters, which is a useful way to chunk your review.
| Cluster | Sections |
|---|---|
| Clinical foundations | Anatomy and Physiology; Medical Terminology |
| Technology and transactions | Information Technology and Computers; Web and Information Technology; EDI Transactions and Clearinghouses |
| Coding and claims | ICD-10-CM Coding; CPT Coding; CMS 1500 Claim Form |
| Payers, rules and application | Insurance; Insurance Carriers; Acronyms and Terms in Common Healthcare Use; Compliance and HIPAA; Managed Care; Fraud and Abuse; General; Case Study |
High-Yield Topics by Section
The blocks below pair each section with the concrete knowledge you will lean on. Treat them as prompts for what to verify, not a substitute for working through the actual AMBA material.
Anatomy and Physiology
The largest published required-answer count (82), so expect substantial volume here even though the count is not a stated scoring weight.
- Body systems and their major organs and functions
- How anatomy links to the procedures and diagnoses you will later code
- Directional and positional terms used in clinical documentation
Medical Terminology
The language of every claim you will ever process.
- Prefixes, suffixes, and root words, and building meanings from word parts
- Common abbreviations versus ones that invite errors
- Matching terms to the body system they belong to
Information Technology and Computers / Web and Information Technology
Two separate sections, so do not assume one covers the other.
- Practice management and billing software concepts
- Data security, backups, and safe handling of patient information
- Web-based tools and portals used for eligibility checks and claim status
ICD-10-CM Coding
Diagnosis coding is where current-year resources matter most.
- Using the Alphabetic Index first, then verifying in the Tabular List
- Code structure, laterality, and specificity
- Official guidelines for sequencing and conventions
CPT Coding
Procedure coding with a heavy emphasis on accurate selection.
- Navigating CPT sections and guidelines
- Modifiers and when they change payment or meaning
- Linking procedures to supporting diagnoses
EDI Transactions and Clearinghouses
How claims travel electronically.
- The role of a clearinghouse between provider and payer
- Electronic claim submission, acknowledgments, and rejections versus denials
- Standard transaction types in the revenue cycle
CMS 1500 Claim Form
Field-level fluency pays off here.
- What each major block of the form captures: patient, insured, diagnosis, service lines, provider
- Common reasons a clean-looking claim still gets rejected
- How diagnosis pointers connect to service lines
Insurance and Insurance Carriers
Two sections that reward knowing the payer landscape.
- Primary versus secondary coverage and coordination of benefits
- Deductibles, copayments, coinsurance, and out-of-pocket maximums
- Differences among government programs and commercial carriers
Compliance and HIPAA / Fraud and Abuse
Often underestimated because they feel like common sense.
- Privacy and security rules, minimum necessary, and permitted disclosures
- Examples of billing practices that cross from error into abuse or fraud
- Documentation and audit-readiness principles
Managed Care
Plan types and the rules that govern access and payment.
- HMO, PPO, and related models, and how referrals and authorizations work
- Network status and its effect on reimbursement
- Capitation versus fee-for-service payment concepts
Acronyms and Terms in Common Healthcare Use / General
Breadth sections that punish gaps in vocabulary.
- Common billing and healthcare acronyms (EOB, ABN, and similar)
- Routine front-office and back-office terminology
- Miscellaneous revenue-cycle concepts that do not fit elsewhere
Case Study
The section that tests whether the other fifteen connect.
- Reading a scenario and identifying the diagnosis, procedure, and claim implications
- Applying payer rules and compliance considerations together
- Working methodically instead of answering from memory
For a candid look at which of these tend to trip people up, read How Hard Is the CMRS Exam?, and for what limited data exists on outcomes, see CMRS Pass Rate 2026.
Open-Book Strategy
Open book is not the same as easy
With 694 required answers and an 85% cumulative standard, the margin for error is narrow. Open book removes the pressure of pure recall, but it adds a different pressure: speed and accuracy in looking things up. A candidate who has never opened the code books before enrollment will burn days flipping pages.
Resource discipline
AMBA requires or directs the use of current-year coding resources, and the public exam outline is undated. Two practical consequences follow. First, buy or access the current-year ICD-10-CM and CPT references before you begin, since answers drawn from outdated editions can cost points. Second, confirm directly with AMBA anything the outline leaves ambiguous rather than relying on forum recollections from earlier years.
Fees, Retakes and Maintenance
Cost mechanics
The calculated initial outlay is $424: the $325 exam plus the $99 required individual membership. The $199 study guide is optional and not included in that figure. Membership renews annually, so budget for the $99 each year you hold the credential. Whether the spend makes sense for your career is the subject of Is the CMRS Certification Worth It?
Retakes
Two retakes are included, but they are subject to AMBA's waiting and completion rules. Read those rules before you start so that an unsuccessful first pass does not collide with the 45-day window or other deadlines.
Staying certified
Annual maintenance requires 15 CEUs, with at least half earned through AMBA, and continuous membership. Missing either requirement puts the credential at risk, so plan CEUs as a recurring task, not a last-minute scramble.
Sequencing the 45 Days
A 45-calendar-day window rewards ordering your work around how the sections build on each other. Here is one sequence that follows the exam's own logic. Adjust the pacing to your schedule and experience.
Foundations
- Anatomy and Physiology (the largest required-answer count), paired with Medical Terminology so the vocabulary reinforces the body systems
Coding and claims
- ICD-10-CM and CPT with current-year books open
- CMS 1500 claim form and EDI Transactions and Clearinghouses, so you see how codes land on a claim
Payers and rules
- Insurance, Insurance Carriers, Managed Care
- Compliance and HIPAA, then Fraud and Abuse
Breadth and application
- IT sections, Acronyms and Terms, and General
- Case Study last, so it draws on everything above, with time left to review flagged answers
The reasoning: coding sections need the most reference-book time, so front-loading the foundations speeds them up, and saving the Case Study for the end lets it work as an integration check. For a broader plan, the CMRS study guide expands on this, and practice questions at our main practice test site help you find weak sections before you commit answers.
Where the Credential Leads
The CMRS targets roles that sit in the reimbursement chain: medical billers, claims processors, billing and coding support staff, insurance follow-up and denial work, and front-office or revenue-cycle positions in physician practices, clinics, and billing companies. Some candidates pursue it to formalize on-the-job experience; others use it to move into billing from an adjacent role. Specific earnings vary by region, employer, and experience, so rather than quoting unverified numbers, consult the CMRS salary guide and browse the kinds of openings covered in CMRS jobs. If you are building skills from scratch, CMRS training outlines your options.
Key Takeaway
Treat the CMRS as a 45-day project, not an exam day. Secure current-year coding resources first, front-load the high-volume sections, and keep the Case Study for last. Practice at our practice test site before you start your attempt.
Frequently Asked Questions
AMBA describes 694 required answers across 16 examination sections. A full breakdown of item types and scored versus unscored items is not publicly specified, so "694 required answers" is the safest way to describe the size.
The passing standard is 85% cumulative. See CMRS Passing Score 2026 for how that standard works in practice.
Yes. It is delivered online in AMBA's student environment and is open book, and it includes a Case Study section. You still need current-year coding resources, and you complete it within 45 calendar days of enrollment rather than in one continuous timed sitting.
The exam is $325 and individual AMBA membership is a required $99 per year, for a calculated initial total of $424. The $199 study guide is optional. Details are in the cost breakdown.
Anatomy and Physiology has the largest published required-answer count at 82. That reflects volume, not an officially stated scoring weight, since AMBA does not publish percentage weights for the 16 sections.