DACVS Study Guide 2026: How to Pass on Your First Attempt

What the Phase I Surgical Knowledge Examination Actually Is

The Phase I Surgical Knowledge Examination, administered by the American College of Veterinary Surgeons (ACVS), is one requirement on the road to becoming a Diplomate. It is a written, computer-based test of the foundational knowledge every surgeon needs before specialty-specific clinical skills come into play. If you came here looking for a broader orientation to the credential, start with What Is DACVS Certification? and then return to this study guide.

The single most important framing point: Phase I addresses surgical fundamentals and basic science. The current ACVS Examination FAQ excludes clinical diseases and their specific treatment. Many residents lose study hours reviewing disease-by-disease surgical management because that material feels like "real surgery." Phase II journal-review and specific surgical-procedure requirements are a separate matter and should not be substituted for the Phase I outline. Your preparation should follow the Phase I blueprint, not the Phase II expectations.

The site you are reading covers both the small-animal and large-animal forms of the examination. Small Animal content covers domestic canine, feline and non-species-specific material. Large Animal content covers equine, food animal, small ruminant, camelid and non-species-specific material. Pick the form that matches your residency track and study to its weights, not to the other form's.

Who Can Sit, and When to Sit

Phase I is open to ACVS residents in good standing, without applicable probation or sanctions. Two attestations are required through CERT: an adviser attestation and the candidate's own training/study-readiness attestation. For the full eligibility picture, see DACVS Requirements 2026: Eligibility, Prerequisites & How to Qualify.

Timing flexibility is a real strategic lever:

• Residents may sit at any time during residency, with the second year generally described as optimal.
• Candidates must pass within six years of starting residency.
• The full-credential completion requirements (the approved residency of at least three years/156 weeks including 110 weeks of surgical training, an accepted scientific publication, approved credentials, and Phase II) are not prerequisites to sitting Phase I during residency.

The practical implication is that Phase I is a knowledge exam you can attack while the basic science and anesthesia concepts from your clinical rotations are still fresh, rather than something to defer until the end of training. If you are weighing your overall path, DACVS Training explains how the residency pathway fits together.

Reading the 2027 Blueprint Like a Study Plan

ACVS published a formal Phase I Examination Blueprint, effective April 2026 for the 2027 examination, following a 2024-2025 Job Task Analysis. The May 7, 2026 announcement confirmed that the revised blueprint applies to the 2027 sitting. This is the single most authoritative document for deciding where to spend your hours.

Four disciplines organize the examination, and they are the official exam disciplines rather than a preparation curriculum:

1. Basic Science
2. Pharmacology
3. Principles of Anesthesia/Analgesia and Pain Management
4. Surgical Methods

An important caution: the blueprint prints approximate weights for individual knowledge areas, separately for each animal form. It does not print aggregate percentages for the four disciplines, so avoid any study resource that claims "Basic Science is X% of the exam" at the discipline level. You can study to the knowledge-area weights, which are published. The small-animal entries as printed total 98% and the large-animal entries total 100%; neither set should be normalized.

Anatomy is the largest individual knowledge area on both forms. For a deeper breakdown of how the four disciplines are organized, see DACVS Exam Domains 2026: Complete Guide to All 4 Content Areas.

Domain 1: Basic Science Priorities

Because these are published weights, a sensible plan gives anatomy, physiology and pathobiology the deepest passes and treats microbiology and biomechanics as targeted reinforcement rather than major projects. Note that Endocrine appears as a system only on the small-animal form, so large-animal candidates should not spend time on it as a standalone system.

Domain 2: Pharmacology

Pharmacology on this exam is organized into discrete knowledge areas, and the two forms differ. Review the list for your form and notice the differences.

Two things stand out. First, Intrasynovial Therapy appears as its own knowledge area only on the large-animal form, so large-animal candidates should treat it as a dedicated topic. Second, Anti-Inflammatory Drugs is a standalone area on the large-animal form, while small-animal candidates will meet inflammation-related drugs through the anesthesia/analgesia discipline (Inflammatory Modulation, 1%). Antimicrobials and fluid therapy are shared priorities across both forms and reward understanding of principles, such as mechanisms, spectrum and perioperative rationale, over memorizing drug names in isolation.

Domain 3: Anesthesia, Analgesia and Pain Management

This discipline is where small-animal and large-animal weights diverge most noticeably in the general-anesthesia and analgesic knowledge areas.

Because the exam is single-best-answer, anesthesia questions often reward knowing why one option is safest or most appropriate under specific patient conditions. Practice articulating the physiologic reasoning behind drug and technique choices rather than recalling doses.

Domain 4: Surgical Methods

Surgical Methods is the discipline closest to day-to-day operating-room fundamentals, and its weights are notably even across areas.

Tissue handling and hemostasis is the single heaviest surgical-methods area on both forms. Think suture materials and patterns, knot security, hemostatic techniques, energy devices, and the principles governing why certain choices work. Wound and tissue healing connects directly back to pathobiology, so studying those two together reinforces both. Remember that this is a principles exam: expect questions about why a technique works, not procedure-by-procedure surgical steps for specific diseases.

Exam Format, Fees and Test-Day Rules

The logistics below come from the 2027 Phase I Surgical Knowledge Examination Information Pamphlet (September 2026). Confirm all details against the current ACVS registration page before you commit to dates, since pamphlets and policies are revised.

For the full cost picture beyond the exam fee, see DACVS Certification Cost 2026: Complete Pricing Breakdown, and for scheduling specifics, DACVS Exam Dates 2026: Testing Windows, Deadlines & Scheduling.

Rules that shape your strategy

• Review is permitted within a part, but you cannot return to the first part after the break. Flag and revisit uncertain items before you finish part one.
• The clock continues during unscheduled breaks. Only the optional scheduled break stops the clock.
• No information aids. Books, notes and phones are prohibited. You remain at the test center during breaks without access to phones, notes or study materials. Laminated note paper is provided.
• About ten items are unscored pilot questions, and you cannot tell which. Treat every question as if it counts and do not spend extra time trying to guess which are pilots.

Building Your Study Around the Reading List

ACVS publishes a Phase I Examination Reading List, and the 2027 list is unchanged from 2026. That stability is useful: older study notes built from the 2026 list remain relevant. Pair the reading list with the blueprint. The blueprint tells you how much of each area to expect; the reading list tells you where the sanctioned source material lives.

A practical method is to build a tracking grid with one row per blueprint knowledge area and columns for the reading-list sources that cover it, your confidence level, and the date of your last practice questions in that area. Where a heavily weighted area, such as anatomy, tissue handling or physiology, shows low confidence, it moves to the front of your queue.

For fast reinforcement near the end of your preparation, a condensed reference such as the DACVS Cheat Sheet 2026: One-Page Review of Must-Know Facts can help you check recall, but it should supplement, never replace, the reading list.

A Domain-Sequenced Schedule

Rather than a generic weekly template, sequence your study by blueprint weight and conceptual dependency. Basic science underpins everything else, so it goes first and gets the longest runway. The timeline below assumes roughly sixteen weeks before the April exam; compress or expand it to fit your residency workload.

When you reach the final weeks, use realistic single-best-answer questions. The main practice test site offers question practice that mirrors the exam's multiple-choice style, and working through it under timed conditions is the most direct way to expose gaps in blueprint areas you assumed were solid.

The Passing Standard and What Not to Assume

The Phase I passing standard is criterion-referenced: it is set by subject-matter experts and equated across years, and it cannot be raised after the examination. That means your result reflects whether you met a defined competence standard, not how you ranked against other candidates in a given year.

Be cautious about numbers you encounter online. No fixed numerical pass mark and no current issuer-wide Phase I pass rate has been verified, so be skeptical of any source that states either with confidence. A published 2017-2021 small-animal residency-program survey exists, but it is historical research rather than a current issuer-wide cohort rate. For the details of how scoring is described, see DACVS Passing Score 2026: Exactly What You Need to Pass and DACVS Pass Rate 2026: What the Data Shows. If you are trying to gauge the exam's difficulty honestly, How Hard Is the DACVS Exam? Complete Difficulty Guide 2026 takes a measured look.

What Comes After Phase I

Clearing Phase I moves you closer to, but not through, certification. You still need the approved residency, an accepted scientific publication, approved credentials and Phase II. After the full credential is earned, maintenance applies to the Diplomate credential itself. For Diplomates certified in 2016 or later, the initial certificate expires on the sixth December 31 after the examination, and subsequent cycles last five years. Maintenance of Certification requires 100 qualifying activity points, with at least 70 within the certified animal specialty (small animal surgery or large animal surgery), continued good standing, and CERT submission by November 1 of the expiry year. The current MOC page specifies no submission fee.

If you are weighing whether the investment pays off, Is the DACVS Certification Worth It? Complete ROI Analysis 2026, DACVS Salary Guide 2026: Complete Earnings Analysis and DACVS Jobs cover the career side. For a grounding in the credential itself, What Is DACVS? is a good starting point.

Frequently Asked Questions