UHM Cheat Sheet 2026: One-Page Review of Must-Know Facts

The One-Page Snapshot

This cheat sheet condenses what a candidate for Certification in Undersea and Hyperbaric Medicine needs in one place: the logistics, the money, the eligibility gates, and the clinical and physiological content the three domains are built around. The certification is administered by the American Board of Preventive Medicine (ABPM), with delivery at Pearson VUE test centers. Physicians who hold ABEM certification have a separate application path through ABEM.

If you want the broader context first, start with What Is UHM Certification? and then come back here to use this page as your final-week reference. For a structured plan built around these facts, pair it with the UHM Study Guide 2026: How to Pass on Your First Attempt.

Exam Logistics at a Glance

Two items on this list are worth underlining. First, the block structure means each hour is a self-contained sprint: whatever you have not answered when time expires in a block is gone, and you cannot circle back. Second, the appointment length is longer than the testing time because it includes the tutorial and a break, so plan your day around the full 3.5 hours rather than three hours of testing.

For the scheduling side of this, including how the window interacts with application deadlines, see UHM Exam Dates 2026: Testing Windows, Deadlines & Scheduling.

Fees and the Two Application Routes

The fee structure depends on which board you apply through. Both routes lead to the same subspecialty certification examination, but the paperwork and the price differ.

ABEM diplomates apply through ABEM rather than ABPM, so confirm which board holds your primary certification before you start an application. The difference between the two totals is $435, which is worth knowing if you are deciding how to budget. A fuller breakdown, including the costs that sit around the exam itself, is in UHM Certification Cost 2026: Complete Pricing Breakdown.

Eligibility Checklist

Eligibility is where well-prepared candidates sometimes get stuck, because the gates are administrative rather than academic. The requirements include:

• Qualifying medical education. Your degree and school must meet the board's standards.
• Unrestricted licenses. Licenses with restrictions can block an application.
• Accepted primary certification. You need a primary board certification the board recognizes.
• Training. Either a 12-month ACGME-accredited UHM fellowship or an approved COLT pathway.
• Training verification. Your program must verify your training, and elapsed-training reference rules apply, so check how long ago your training was completed relative to your application.

Do not wait until the exam window opens to discover a verification problem. Start the paperwork early, because program directors and licensing boards can take time to respond. The complete picture of prerequisites is covered in UHM Requirements 2026: Eligibility, Prerequisites & How to Qualify.

Domain 1: Fundamentals

The first domain is the physics, physiology, and equipment foundation that everything else rests on. Questions here often look like calculations or mechanism problems, and they reward candidates who understand why a gas law applies rather than those who memorized formulas in isolation.

A useful drill is to take any gas-law concept and force yourself to state a clinical consequence in one sentence. If you can only recite the formula, you are not yet at the level the question stems demand. The structure of this content area is explored further in UHM Exam Domains 2026: Complete Guide to All 3 Content Areas.

Domain 2: Diving Medicine

Diving Medicine covers the injuries, illnesses, and fitness questions specific to people who work or play under pressure. This domain rewards pattern recognition: a stem describing a diver's symptoms, dive profile, and timeline should point you toward a diagnosis and a management decision.

Domain 3: Clinical Hyperbaric Medicine

The third domain turns to the therapeutic use of hyperbaric oxygen in hospital and outpatient practice. This is the domain most closely tied to day-to-day clinical work for physicians who staff wound care and hyperbaric programs, and it tests both indications and the management of the patient inside the chamber.

For a sense of how demanding these three content areas are in combination, read How Hard Is the UHM Exam? Complete Difficulty Guide 2026. When you want to test your recall under realistic conditions, the UHM practice test site is built around exactly these three domains.

Test-Day Rules and Pacing

Because the exam is closed book and you cannot return to a completed block, your pacing strategy matters more than it would on an exam with free navigation. Three practical points follow from the format:

1. Budget by block, not by the whole exam. You have three one-hour blocks across 150 questions. Work out your per-question pace before test day and check against it at the midpoint of each block.
2. Answer everything before the block ends. Since earlier blocks are locked, unanswered items are lost. Make your best choice and move on rather than leaving a question blank.
3. Use the break deliberately. The 3-hour-30-minute appointment includes the tutorial and a break. Reset between blocks instead of carrying the last block's difficulty into the next.

No initial remote or adaptive delivery policy and no calculator policy has been verified, so do not assume either. Confirm the current testing rules in your scheduling confirmation and the board's candidate materials. For how scoring thresholds work, see UHM Passing Score 2026: Exactly What You Need to Pass.

Scheduling Your Review by Domain

Rather than generic advice, here is a domain-ordered plan that reflects how the content builds on itself. Fundamentals comes first because both of the other domains lean on it, and the clinical domain comes last because it integrates everything.

If your remaining time is short, weight your effort toward whichever domain feels least familiar from your own clinical background. An emergency physician, for example, may find clinical content intuitive but need more time on gas physics. Another approach to organizing your preparation appears in the complete UHM study guide.

Keeping the Certificate Current

Passing is the start of an ongoing obligation. The ABPM Continuing Certification Program (CCP) for 2025-2029 sets the following requirements:

• Maintain annual licensure.
• Complete 20 Category 1 CME credits, including at least six that are relevant to the certificate.
• Answer 30 longitudinal questions per certificate.
• Pay an annual fee of $150, $175, or $200, depending on the payment quarter.

Individual certificate expiry dates are not something to guess at. Confirm yours by logging into your ABPM account. Early payment carries the lower fee, so there is a real incentive to handle the annual obligation promptly. The lifetime value of holding the credential is examined in Is the UHM Certification Worth It? Complete ROI Analysis 2026, and the career side is covered in UHM Jobs.

Frequently Asked Questions