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DACVS Training

TL;DR
  • Phase I is the ACVS Surgical Knowledge Examination: 125 single-best-answer questions over a seven-hour published period.
  • Passing Phase I alone does not award the Diplomate credential; residency, publication and Phase II are also required.
  • Anatomy is the largest knowledge area: 10% on the small-animal form and 12% on the large-animal form.
  • The 2027 fee is USD 795, with registration open September 16 to October 30, 2026.

What "DACVS Training" Actually Covers

When people search for "DACVS training," they usually mean one of two things: the multi-year residency that leads to the credential, or the preparation needed for the first of its two examinations. Both matter, and they interact. The credential is Diplomate, American College of Veterinary Surgeons, awarded by the American College of Veterinary Surgeons (ACVS). This article focuses on training for the Phase I Surgical Knowledge Examination while placing it in the context of the residency that surrounds it.

If you are still orienting yourself to the credential itself, start with What Is DACVS? or What Does DACVS Stand For?, then return here. For the broader credential overview, see DACVS Certification.

Scope note: Phase I addresses surgical fundamentals and basic science. According to the current ACVS Examination FAQ, it excludes clinical diseases and their specific treatment. Training that leans heavily on case-specific surgical procedures belongs to Phase II preparation, not Phase I.

The Training Pathway: Internship to Residency

DACVS training is a staged pathway rather than a single course. The sequence looks like this:

  1. Veterinary qualification. A veterinary degree is the baseline requirement for entering the pathway.
  2. Rotating internship. A twelve-month rotating internship, or equivalent experience, precedes residency entry.
  3. Approved residency. At least three years (156 weeks), including 110 weeks of surgical training, completed in an ACVS-approved program.
  4. Scientific publication. An accepted scientific publication is part of full certification.
  5. Credentials approval. Residency credentials must be approved by the College.
  6. Phase I and Phase II. Both examinations must be passed. Phase I tests knowledge; Phase II is a separate later examination.

The governing document for the residency component is the ACVS Residency Training Standards and Requirements (2026-2027 edition). Your program director will work from it, and you should read the relevant sections yourself rather than relying on secondhand summaries. For a fuller treatment of eligibility, see DACVS Requirements: Eligibility, Prerequisites & How to Qualify.

Where Phase I Fits Inside Residency Training

Phase I is unusual among specialty examinations because you take it during training, not at the end. Eligibility requires that you are an ACVS resident in good standing, without applicable probation or sanctions. Your residency adviser provides an attestation, and you provide your own training and study-readiness attestation in CERT, the College's credentialing system.

Timing flexibility is real but bounded:

  • Residents may sit for Phase I at any point during residency.
  • The second year is considered optimal, because by then you have clinical exposure to ground the basic science.
  • You must pass within six years of starting residency.
Don't conflate the milestones: Completing the full residency, the publication requirement and credentials approval are requirements for the finished credential. They are not prerequisites for sitting Phase I during residency. Many residents are surprised to learn they can take the examination well before those pieces are complete.

Reading the Blueprint as a Training Map

The ACVS Phase I Examination Blueprint, effective April 2026 for the 2027 examination, is the single most useful document for structuring your training. It followed the 2024-2025 Job Task Analysis, and the College confirmed its application to the 2027 sitting in a May 7, 2026 announcement.

The blueprint organizes content into four main disciplines. These are official examination disciplines, not preparation-curriculum headings, so treat them as the categories the test is built on rather than as a ready-made study plan:

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

A critical detail: the blueprint prints approximate weights for individual knowledge areas, separately for each animal form. It does not give aggregate percentages for the four disciplines, and you should not manufacture them by adding numbers together. The small-animal entries total 98% as printed and the large-animal entries total 100%. Neither set should be normalized.

For a deeper domain-by-domain walkthrough, see DACVS Exam Domains: Complete Guide to All 4 Content Areas.

Training by Domain: What to Master

Domain 1: Basic Science

This is the heaviest territory on both forms. Systems covered include Gastrointestinal, Cardiovascular, Respiratory, Urogenital, Musculoskeletal, Neurological/Special Senses, Integumentary, Endocrine (small animal only) and Non-System Specific.

  • Small animal: Anatomy 10%, Physiology 9%, Pathobiology 9%, Microbiology 2%, Biomechanics and Locomotion 4%.
  • Large animal: Anatomy 12%, Physiology 10%, Pathobiology 9%, Microbiology 3%, Biomechanics 2%.
  • Anatomy is the largest single knowledge area on either form, so it deserves sustained, repeated attention.

Domain 2: Pharmacology

Pharmacology on this examination is organized around the drugs a surgeon actually uses and the principles behind using them.

  • Small animal: Antimicrobials 3%, C-V/Autonomic Drugs 2%, Fluid Therapy 3%, Biological Therapy 1%, Other Drugs 2%.
  • Large animal: Antimicrobials 4%, Anti-Inflammatory Drugs 3%, Fluid Therapy 3%, Biological Therapy 2%, Intrasynovial Therapy 3%, Other Drugs 3%.
  • Note the large-animal form carries distinct categories, such as intrasynovial therapy, that have no small-animal counterpart on the blueprint.

Domain 3: Principles of Anesthesia/Analgesia and Pain Management

The blueprint splits this discipline into equipment, general and local anesthesia, analgesics, anesthetic drugs and inflammatory modulation.

  • Small animal: Anesthetic Equipment 3%, General Anesthesia 6%, Local Anesthesia 3%, Analgesics 5%, Anesthetic Drugs 3%, Inflammatory Modulation 1%.
  • Large animal: Anesthetic Equipment 2%, General Anesthesia 3%, Local Anesthesia 3%, Analgesics 3%, Anesthetic Drugs 3%, Inflammatory Modulation 2%.
  • General anesthesia and analgesics carry noticeably more weight on the small-animal form.

Domain 4: Surgical Methods

This is the discipline closest to daily surgical practice, covering the fundamentals that every procedure depends on.

  • Small animal: Tissue Handling/Hemostasis 8%, Aseptic Techniques 6%, Wound/Tissue Healing 6%, Instrumentation Implants 6%, Fundamentals and Principles of Surgery 6%.
  • Large animal: Tissue Handling/Hemostasis 7%, Aseptic Techniques 5%, Wound/Tissue Healing 7%, Instrumentation Implants 7%, Fundamentals and Principles of Surgery 4%.
  • Tissue handling and hemostasis is the single largest line in this discipline on the small-animal form.

Key Takeaway

Because published weights are spread across many knowledge areas rather than concentrated in a few, no single topic can carry you. Breadth across all four disciplines, with extra depth in anatomy and physiology, is the defensible training strategy.

Small Animal vs. Large Animal Forms

The examination retains both a small-animal and a large-animal form, and your choice shapes your training. Small Animal covers domestic canine, feline and non-species-specific content. Large Animal covers equine, food animal, small ruminant, camelid and non-species-specific content.

Knowledge AreaSmall AnimalLarge Animal
Anatomy10%12%
Physiology9%10%
Antimicrobials3%4%
General Anesthesia6%3%
Analgesics5%3%
Tissue Handling/Hemostasis8%7%
Fundamentals and Principles of Surgery6%4%
Endocrine system contentIncludedNot listed
Intrasynovial TherapyNot listed3%

The practical lesson: do not borrow study priorities from a colleague on the other form. A large-animal resident who studies from a small-animal friend's notes will under-prepare for intrasynovial therapy and over-invest in anesthesia categories that weigh less on their own form.

Exam Format and Training Your Stamina

Training for Phase I includes training for the sitting itself. The format has several features worth rehearsing:

  • 125 single-best-answer multiple-choice questions, including approximately ten unscored pilot questions. You will not know which are pilot items, so treat every question as scored.
  • Seven-hour published examination period, divided into two equal-time parts.
  • An optional scheduled break of up to one hour during which the test clock stops. Unscheduled breaks do not stop the clock.
  • Review within a part is permitted, but you cannot return to the first part after the break.
  • No information aids. Books, notes and phones are prohibited, you stay at the test center during breaks, and laminated note paper is provided.

The no-return rule after the break changes how you should pace. Finish the first part with your answers settled, because that door closes. For a view on how demanding the sitting is, see How Hard Is the DACVS Exam?

On scoring, the passing standard is criterion-referenced, set by experts and equated across years, and it cannot be raised after the examination. No fixed numerical pass mark or current issuer-wide Phase I pass rate has been verified, so be skeptical of any source quoting a specific cut score. See DACVS Passing Score and DACVS Pass Rate for how to interpret what is and is not known. The published 2017-2021 small-animal residency-program survey is historical research and should not be read as a current cohort rate.

Registration, Fees and Logistics

Logistics are part of training, because a missed deadline wastes months of preparation. The details below come from the September 2026 Phase I Information Pamphlet for the 2027 sitting:

Item2027 Detail
Examination feeUSD 795
Registration windowSeptember 16 to October 30, 2026
Payment dueJanuary 8, 2027
Exam date (Americas and Europe)April 19, 2027
Exam date (Asia and Oceania)April 20, 2027
DeliveryComputer-based at Pearson VUE / Pearson Professional Assessments centers, coordinated through HumRRO
ResultsOrdinarily released in four to six weeks

Registration runs through ACVS, with testing delivered by Pearson VUE. Confirm current details at the ACVS Phase I examination page before acting, since dates and procedures are updated each cycle. For a calendar-focused view, read DACVS Exam Dates, and for the wider financial picture see DACVS Certification Cost.

Backward planning: The examination is April 19, 2027, but the registration window closes the previous October. Your training clock effectively starts well before registration opens, so decide on your form and sitting year early in your residency conversations.

A Domain-Sequenced Preparation Plan

Rather than a generic weekly template, sequence your preparation by how the blueprint weights content and how quickly each area compounds. The ACVS Phase I Examination Reading List is the anchor source; the 2027 list is unchanged from 2026, so earlier annotated notes remain usable.

Early Block

Basic Science foundations

  • Start with anatomy, your single largest knowledge area, and revisit it repeatedly rather than once.
  • Pair physiology and pathobiology with it so mechanisms attach to structures.
  • Cover microbiology and biomechanics here as well.
Middle Block

Pharmacology and Anesthesia/Analgesia

  • Study drug classes alongside the anesthesia principles that rely on them.
  • Small-animal candidates should weight general anesthesia and analgesics more heavily.
  • Large-animal candidates should include intrasynovial and anti-inflammatory therapy.
Late Block

Surgical Methods and integration

  • Work through tissue handling, asepsis, wound healing and implants.
  • Take timed, full-length practice sessions to rehearse the two-part, no-return format.
  • Return to your weakest knowledge areas identified by practice results.

Basic science goes first because it supplies the vocabulary and mechanisms the later disciplines assume. Surgical Methods comes late because it integrates the others. Use the question-bank approach on the DACVS practice test platform to identify gaps, and consult the DACVS Study Guide for a longer-form plan.

After Phase I: Phase II and Maintenance

Passing Phase I is a milestone, not the finish line. Phase II is a separate examination with its own journal-review and surgical-procedure requirements, and those must not be substituted for the Phase I outline when you study. Keep the two preparations conceptually distinct.

Once you complete certification, maintenance applies to the full Diplomate credential. 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 your 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. Details are in the ACVS Diplomate Maintenance of Certification Policies and Procedures.

If you are weighing whether the long pathway is worth it, see Is the DACVS Certification Worth It?, and for career context explore DACVS Jobs and the DACVS Salary Guide. When you are ready to test yourself against realistic questions, the main practice test site is the place to begin.

Frequently Asked Questions

Does passing Phase I make me a DACVS Diplomate?

No. Phase I is one requirement. Full certification also requires an approved residency of at least three years, an accepted scientific publication, approved credentials and Phase II.

When should I sit for Phase I during residency?

Residents may sit at any time during residency, with the second year considered optimal. You must pass within six years of starting residency, and you need good standing plus adviser and candidate attestations in CERT.

Does Phase I test clinical diseases and their treatment?

No. The current Examination FAQ states that Phase I addresses surgical fundamentals and basic science and excludes clinical diseases and their specific treatment.

How many questions are on the exam, and how long do I have?

The exam has 125 single-best-answer multiple-choice questions, including approximately ten unscored pilot questions, within a seven-hour published period split into two equal-time parts with an optional break of up to one hour.

What is the passing score?

The standard is criterion-referenced, set by experts and equated across years. No fixed numerical pass mark or current issuer-wide pass rate has been verified, so treat any specific figure you see elsewhere with caution.

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