What is pre-op clearance?
Pre-op clearance — short for "pre-operative clearance" — is a clinical evaluation documenting that a patient is medically safe to undergo anesthesia and a specific surgical procedure. It is a synthesis of the patient's history, physical exam, current medications, relevant labs, EKG when indicated, and any specialist consultation that the patient's comorbidities require.
It is not a single test. There is no "clearance lab." The clearance is a clinical opinion supported by data — and the quality of the opinion depends on whether the clinician issuing it knows what the planned anesthetic and procedure actually require.
Pre-op clearance also has a workflow purpose: it documents to the surgical practice, the ASC or hospital, and the anesthesia provider that the medical evaluation has happened, the patient's comorbidities are accounted for, and any holds or conditions have been communicated to the patient before the day of surgery. When the clearance arrives late, is incomplete, or flags an issue the anesthesia provider hadn't seen, the case is in trouble.
Who needs pre-op clearance?
Practically, every patient undergoing anesthesia for surgery needs a documented pre-op evaluation. The depth of the evaluation varies dramatically based on three factors: patient age, comorbidities, and the complexity of the planned procedure.
- •Healthy patients under 40 with minor elective surgery — often need only history, physical, and limited or no labs.
- •Patients with comorbidities (HTN, diabetes, obesity, cardiac, pulmonary, renal) — need a more thorough evaluation, often including labs and specialist consultation.
- •ASA III and above — typically need a fuller workup, with specific attention to optimization of chronic conditions.
- •Higher-risk procedures (long duration, large blood loss, major abdominal or cardiothoracic, spine) — require a more cautious clearance regardless of patient status.
The risk classification standard used most often is the ASA Physical Status classification — ASA I (healthy), ASA II (mild systemic disease), ASA III (severe systemic disease, not incapacitating), ASA IV (severe systemic disease, constant threat to life), and so on. The ASA-II-to-III cusp is where most elective cases live or die.
What's in a complete pre-op clearance?
A complete clearance document, at minimum, contains:
Name, DOB, surgeon, and the specific planned procedure.
Current and past medical conditions, surgical history, allergies, family history of anesthetic problems.
Including supplements, GLP-1s, anticoagulants, and the hold plan for each medication that needs one.
Ordered per patient age, comorbidities, and procedure type — not by reflex.
The provider's assigned risk class, ideally with the reasoning if it's not obvious.
Cleared, Cleared with Conditions, or Not Cleared — with the specific conditions named.
The most common quality issue is not what's in the clearance — it's what's missing. A medication list without a hold plan, a clearance for "general surgery" without naming the specific procedure, an ASA class that doesn't match the body of the letter. These are the gaps that anesthesia providers catch — usually too late. For specific lab guidance, see the pre-op lab checklist for the 2026 evidence-based panel.
The three verdict types
The patient is safe to proceed as planned. No additional workup required. No conditions to address.
The patient can proceed only if specific items are addressed — a medication hold, an updated lab, a confirmatory test, a specialist sign-off. This is the most common verdict in private practice, and the right call for borderline cases where the issue is non-critical and easily addressed before surgery.
A serious unknown or unaddressed clinical risk requires resolution before surgery is scheduled. Not Cleared is a hard gate — reserved for cases where the risk is real and the path to clearance is not just a small change.
The right call in borderline cases is almost always Cleared with Conditions, not Not Cleared. A Not Cleared verdict has scheduling consequences for the patient and the practice — it should be reserved for genuine clinical concerns, not as a way to push the decision back to the surgeon.
What gets a case cancelled on the day of surgery
These are the top day-of-surgery cancellation triggers. Almost all of them are visible in the chart two or more weeks before surgery — the failure point is the review step, not the underlying condition.
For the full breakdown of why these get missed and the cost of each one, read the Field Note on why pre-op clearances fail. The economics are detailed in the hidden cost of same-day surgical cancellations.
The clearance workflow
The standard private-practice workflow has five steps:
- 1Schedule the case
The surgical practice schedules the procedure and identifies which clearances are needed based on patient comorbidities and procedure type.
- 2Request clearance from the PCP
The coordinator sends a clearance request to the patient's PCP — ideally 3-4 weeks before surgery to allow for additional labs or specialist consults if flagged.
- 3PCP evaluates and sends the letter
The PCP performs the H&P, orders labs, and sends a clearance letter with the verdict and any conditions.
- 4Surgeon and anesthesia provider review
The clearance arrives at the surgical practice. Both the surgeon and the anesthesia provider review the chart — and they review it when documents arrive, not the night before surgery. This is the highest-leverage step in the entire workflow.
- 5Communicate holds to the patient
Any medication holds, NPO timing, and pre-op instructions get communicated to the patient. This is typically the coordinator's job, but the anesthesia provider should confirm the patient understands.
The point of failure most often is step 4. A coordinator review cannot substitute for a clinician review — coordinators are not licensed to make anesthesia judgment calls, and the most common same-day cancellations come from missing the clinical signal that a non-clinical reviewer doesn't recognize. For plastic surgeons specifically, the workflow has additional considerations covered in the plastic-surgery workflow guide.
GLP-1 medications and pre-op clearance
GLP-1 medications — Ozempic, Wegovy, Mounjaro, Zepbound — have become the single most common new variable in pre-op clearance since 2024. Current ASA guidance recommends holding GLP-1 medications ahead of surgery to reduce the aspiration risk from delayed gastric emptying. The exact hold window varies by formulation and patient factors; the principle is consistent.
The clearance failure mode is predictable: the medication is on the patient's list, the PCP doesn't flag a hold, the coordinator doesn't catch it, and the anesthesia provider sees it for the first time on the day of surgery. The case gets held. The OR runs short. The patient comes back two weeks later after the hold completes.
GI colleagues continue to report endoscopic findings consistent with delayed gastric emptying weeks after patients stop their weekly injection — the full window of risk is still being characterized. The full clinical breakdown is in the Field Note on GLP-1 surgery hold.
Plastic-surgery specific considerations
Plastic surgery in office-based and ASC settings has distinct clearance considerations: the procedures are elective, the economics of cancellation are concentrated (a single $15K-$30K case canceled is a meaningful business event), and the patient population skews toward younger and healthier — which paradoxically produces complacency in the clearance review.
The specifics — implant-case lab requirements, weight-loss medication holds for body-contouring cases, smoking cessation, and the office-based vs ASC venue trade-offs — are covered in detail in the plastic-surgery workflow guide.
How AI changes the pre-op clearance workflow
The clearance documents have not changed. The verdict types haven't changed. The clinical guidelines that govern the call haven't changed. What has changed is the time and attention available to do the review — which has gotten worse, not better, with EMR overload and the volume of cases moving to ASCs.
AI in 2026 changes the review step. An AI pre-op tool reads the chart, labs, medication list, and procedure context in under 30 seconds and surfaces the specific concerns a credentialed anesthesia reviewer should confirm. The clinician reviews the AI's output, overrides any flag they disagree with, and signs. The clinical authority stays with the licensed provider — what changes is how much time gets spent on documents that have no issues vs. documents that do.
This isn't hypothetical. The mechanics of AI pre-op chart review are detailed in how AI anesthesia pre-op charting works, and the first randomized trial of an AI chatbot in pre-op care is covered in the AI co-pilot has landed in the preop clinic. If you want to evaluate AI tools yourself, the anesthesia AI buyer's framework has the seven criteria that matter.
Frequently asked questions
What is pre-op clearance in 2026?
Pre-op clearance is a documented medical evaluation confirming a patient is safe to undergo anesthesia and surgery for a specific procedure. It is performed by a clinician — typically the patient's primary care physician or relevant specialist — and reviewed by the anesthesia provider and the surgeon's office before the day of surgery. It is not a single test; it is a synthesis of history, physical exam, labs, EKG when indicated, and a verdict on the patient's risk for the planned procedure.
Who issues a pre-op clearance?
The patient's primary care physician (PCP) usually issues the clearance letter. For higher-risk patients, a specialist (cardiologist, pulmonologist, nephrologist, endocrinologist) may issue an organ-system-specific clearance instead of or in addition to the PCP letter. The clearance is then reviewed by the anesthesia provider responsible for the case, who has the final clinical authority to accept, conditionally accept, or reject the clearance.
Is a PCP clearance letter the same as anesthesia clearance?
No. A PCP clearance letter is a primary-care opinion that the patient is safe to proceed from a general-medicine perspective. Anesthesia clearance is the anesthesia provider's separate determination — applying anesthesia-specific guidelines (ASA classification, airway evaluation, NPO rules, medication holds, transfusion thresholds) to the planned procedure. The PCP letter is an input to the anesthesia decision, not a replacement for it.
How long is a pre-op clearance valid?
Most clearance letters are considered valid for 30 days before the date of surgery, assuming no significant clinical change in the patient's status during that window. Some practices and ASCs require updated labs within 14-30 days. If the patient is hospitalized, starts a new medication, or develops a new diagnosis between clearance and surgery, the clearance should be re-reviewed.
What is the difference between 'Cleared,' 'Cleared with Conditions,' and 'Not Cleared'?
Cleared means the patient is safe to proceed as planned with no additional workup required. Cleared with Conditions means the patient can proceed only if specific items are addressed — for example, a medication hold, additional lab, or a confirmatory test. Not Cleared means a serious unknown or unaddressed clinical risk requires resolution before any surgery is scheduled. Cleared with Conditions is the most common verdict in private-practice settings and is the right call for borderline cases where the issue is non-critical and easily addressed.
What labs are required for pre-op clearance?
There is no universal lab panel — the required tests are determined by patient age, comorbidities, and procedure complexity. A healthy patient under 40 having minor elective surgery may need nothing. A 65-year-old diabetic having spine surgery typically needs CBC, BMP, A1c, and an EKG. The American Society of Anesthesiologists has published guidance on appropriate pre-op testing; over-ordering labs out of habit is one of the most common workflow inefficiencies in pre-op.
What gets cases cancelled on the day of surgery?
The most common day-of-surgery cancellation triggers are: uncontrolled hypertension (BP >180/110), uncontrolled diabetes (hyperglycemia or DKA), severe anemia (Hgb below the case-specific cutoff), recent cardiac event or uncontrolled angina, active respiratory infection, missed medication hold (especially GLP-1 medications and anticoagulants), positive pregnancy test, non-compliant NPO status, and missing or expired clearance documentation. Most of these are catchable two or more weeks before surgery if the chart is reviewed in time.
What is the typical pre-op clearance workflow?
The standard private-practice workflow is: surgeon's office schedules the case → coordinator requests clearance from PCP → PCP performs evaluation, orders labs, sends letter → coordinator reviews letter for completeness and flags concerns to the surgeon → surgeon and anesthesia provider review the chart well before the day of surgery → any holds or follow-ups are communicated to the patient → patient arrives on day of surgery with confirmed clearance. The point of failure most often is the coordinator-review step — a non-clinical reviewer can miss clinically significant flags that an anesthesia provider would catch.
Can AI replace pre-op clearance review?
No. AI cannot replace the licensed clinician's clinical authority. What AI does in 2026 is accelerate the chart-review step — reading the H&P, labs, medications, and procedure context against current clinical guidelines and surfacing the specific concerns the anesthesia provider should confirm. The clinician reviews the AI's output, overrides any flag they disagree with, and signs. The verdict still belongs to the credentialed clinician.
How much does a same-day surgical cancellation cost a private-practice surgeon?
Estimates range from $1,500 to $15,000+ per case depending on the procedure and venue, with cosmetic and orthopedic cases at the high end. The cost includes lost OR time, lost facility fee, anesthesia stipend, staff time, and lost downstream revenue (the patient frequently re-schedules elsewhere). For an ASC running 8-10 cases a day, a single same-day cancellation can wipe out the margin on a half-day of OR time.
The pre-op review step takes 30 seconds with MyPreOp.ai.
Built by a practicing CRNA. Reads the chart, flags the cancellation triggers, returns a Red/Yellow/Green verdict with a two-section PDF — coordinator language on the front, anesthesia detail on the back. Validated on 475+ real clearances. HIPAA-compliant.
No contracts. Cancel anytime. AANA-aligned, ASA-aligned, HIPAA-compliant.