Summary & Overview
CPT 00812: Anesthesia for Screening Colonoscopy Below the Duodenum
CPT code 00812 captures anesthesia services for screening colonoscopy procedures in which the endoscope is advanced into the intestines below the duodenum. As an anesthesia-specific CPT code, it identifies the professional anesthetic care associated with lower gastrointestinal endoscopic procedures and is relevant for hospital outpatient departments, ambulatory surgical centers, and endoscopy suites nationwide. Accurate use of CPT code 00812 supports proper clinical documentation, billing, and national monitoring of anesthesia resource use tied to colorectal cancer screening and diagnostic endoscopy.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical context for anesthesia during lower GI endoscopy and what to expect in claims for screening colonoscopy procedures. The publication summarizes common billing considerations, payer coverage patterns, and where CPT code 00812 fits within anesthesia service reporting. It also outlines benchmarks and policy-relevant details affecting reimbursement and compliance, and highlights clinical scenarios that typically generate use of this code.
This national summary is designed for billing managers, anesthesia providers, and policy analysts seeking concise guidance on the role and reporting of CPT code 00812 in routine screening colonoscopy care.
Billing Code Overview
CPT code 00812 describes anesthesia services provided for a patient undergoing a screening colonoscopy during which the surgical provider introduces an endoscope into the intestines below the duodenum. The service type is anesthesia for lower gastrointestinal endoscopic procedure. The typical site of service is an endoscopy suite or ambulatory surgical center, and the service may occur in an inpatient operating room when performed during an admission.
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Clinical & Coding Specifications
Clinical Context
A 58-year-old patient presents for a screening colonoscopy performed under monitored anesthesia care. The procedure involves insertion of a flexible endoscope into the colon (intestines below the duodenum) to evaluate for colorectal neoplasia. Pre-procedure workflow includes pre-anesthesia assessment (ASA classification P2 for controlled hypertension), informed consent, IV sedation planning, and brief focused airway and comorbidity review. On the day of service the anesthesia provider administers sedative and analgesic medications, monitors oxygenation, ventilation, hemodynamics, and level of consciousness, and provides interventions as needed throughout the endoscopic examination and polypectomy if performed. Post-procedure recovery includes handoff to PACU staff, documentation of anesthesia medications and monitoring, and discharge instructions once recovery criteria are met. This scenario is typical for ambulatory surgical centers and hospital outpatient departments where screening colonoscopies are commonly performed.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
23 | Unusual Anesthesia | Use when general anesthesia is required for an otherwise normally not anesthetized procedure due to patient or procedural factors |
50 | Bilateral Procedure | Use when identical procedures are performed bilaterally (rare for colonoscopy) |
52 | Reduced Services | Use when the anesthesia service is intentionally reduced or partially performed |
53 | Discontinued Procedure | Use when the procedure is terminated after initiation for patient safety |
62 | Two Surgeons | Use when two surgeons perform distinct surgical parts concurrently; may affect anesthesia documentation in complex cases |
76 | Repeat Procedure by Same Physician | Use when the anesthesia service is repeated by the same provider during the postoperative period |
78 | Return to Operating/Procedure Room for a Related Procedure During the Postoperative Period | Use when the patient returns for a related procedure requiring anesthesia during the global period |
93 | Patient Transported to Another Site of Service | Use when the anesthesia service is performed because the patient is transported to an alternate ambulatory site |
AA | Anesthesia by Anesthesiologist | Use when the service is personally performed by a physician anesthesiologist |
AD | Medical Supervision by a Physician; More than Four Concurrent Anesthesia Procedures | Use when supervising multiple concurrent anesthesia providers |
QS | Monitored Anesthesia Care Service | Use to identify MAC when required by payer policy in addition to base anesthesia code |
QX | Qualified Non-Physician Anesthetist | Use when a CRNA performs service with no medical direction by an anesthesiologist |
QZ | CRNA Service Without Medical Direction | Use when a CRNA performs the entire service without physician supervision |
99 | Multiple Modifiers | Use as an internal carrier-specific indicator when multiple modifier entry is required |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
207L00000X | Anesthesiology | Primary specialty providing anesthesia services for colonoscopy |
208600000X | Gastroenterology | Proceduralist performing the colonoscopy; coordinates with anesthesia team |
261QM0800X | Ambulatory Surgery Center (ASC) | Facility taxonomy representing typical outpatient site of service |
208000000X | General Surgery | Surgeons who may perform colonoscopic interventions such as complex polypectomy |
363A00000X | Nurse Anesthetist | Certified Registered Nurse Anesthetists commonly provide monitored anesthesia care |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
Z12.11 | Encounter for screening for malignant neoplasm of colon | Primary screening indication for screening colonoscopy requiring anesthesia services in some patients |
K57.30 | Diverticulosis of large intestine without perforation or abscess | Common colonic condition encountered during colonoscopy that may influence procedural approach |
K63.5 | Polyp of colon | Finding often identified and removed during colonoscopy; may necessitate additional procedure time |
R19.4 | Change in bowel habit | Symptom prompting diagnostic colonoscopy rather than routine screening |
K92.2 | Melena | Indication for diagnostic colonoscopy to locate lower GI bleeding source |
I10 | Essential (primary) hypertension | Common comorbidity affecting anesthesia risk assessment and monitoring |
E11.9 | Type 2 diabetes mellitus without complications | Common comorbidity impacting perioperative glucose management and risk stratification |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
00810 | Anesthesia for lower abdominal procedures (e.g., colon, rectum) | Alternative anesthesia code for procedures involving lower abdomen; may be used depending on exact procedure site and coding conventions |
00740 | Anesthesia for upper gastrointestinal endoscopic procedures, endoscope introduced proximal to ligament of Treitz | Contrasts with 00812 which is for endoscope introduced below the duodenum; used for upper endoscopy procedures |
45380 | Colonoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure) | Commonly performed procedural CPT by the gastroenterologist during the same encounter; anesthesia code 00812 corresponds to anesthesia for this procedure |
45385 | Colonoscopy with biopsy, single or multiple | Performed by the endoscopist during the colonoscopy; may extend anesthesia time and complexity |
45390 | Colonoscopy with removal of tumor(s), polypectomy by snare technique | Therapeutic intervention frequently performed during screening colonoscopy that affects anesthesia time and monitoring |