CPT 00811: Anesthesia for Lower Intestinal Endoscopic Procedure
CPT code 00811 designates anesthesia services for an unspecified lower intestinal endoscopic procedure in which an endoscope is advanced into the intestines up to, but not into, the duodenum. This code matters nationally because anesthesia billing for endoscopic procedures contributes to procedural cost, resource allocation in ambulatory surgery centers and hospitals, and claims processing for peri-procedural services. Clear coding supports appropriate payment, care coordination, and quality measurement for gastrointestinal endoscopy care.
Key payers considered in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The review addresses how CPT code 00811 is used across typical sites of service such as endoscopy suites and hospital outpatient departments.
Readers will learn the clinical context of the code, where the service is typically delivered, and practical considerations relevant to national billing and policy environments. The publication summarizes benchmark uses, payer coverage patterns, and any notable policy or coding guidance affecting anesthesia for lower intestinal endoscopy. Data not available in the input are noted where applicable.
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Billing Code Overview
CPT code 00811 describes anesthesia services provided for a patient undergoing an unspecified lower intestinal endoscopic procedure in which the surgical provider introduces an endoscope into the intestines up to, but not into, the duodenum (the portion of the small intestine just below the stomach).
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Service type: Anesthesia for lower intestinal endoscopic procedure
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Typical site of service: Endoscopy suite or hospital outpatient department where lower intestinal endoscopic procedures are performed
Data not available in the input for modifiers, taxonomies, ICD-10 diagnoses, and related codes.
Clinical & Coding Specifications
Clinical Context
A typical patient is a 58-year-old with chronic iron-deficiency anemia and intermittent lower abdominal pain referred for an outpatient diagnostic colonoscopic evaluation. The gastroenterology team schedules a lower intestinal endoscopic procedure up to but not into the duodenum to visualize the colon and terminal ileum. The anesthesia provider meets the patient in pre-op, reviews history, airway, and comorbidities (e.g., coronary artery disease, obstructive sleep apnea), obtains informed consent for monitored anesthesia care or general anesthesia as appropriate, and documents baseline vitals and ASA status.
On procedure day the patient arrives to an ambulatory surgery center or hospital endoscopy suite. Standard monitors are applied (pulse oximetry, noninvasive blood pressure, ECG, capnography if sedated), intravenous access is confirmed, and sedation is administered per the anesthesia plan. The gastroenterologist advances the endoscope through the rectum, colon, and may intubate the terminal ileum; the anesthesia provider maintains sedation depth and physiologic stability. Post-procedure the patient is recovered in a PACU or endoscopy recovery area until discharge criteria are met or the patient is admitted if complications occur.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
23 | Unusual Anesthesia | Use when emergency or unusual circumstances require general anesthesia for a procedure usually performed with sedation. |
50 | Bilateral Procedure | Use when identical procedures are performed on both sides of a paired organ during the same session (rare for lower intestinal endoscopy). |
52 | Reduced Services | Use when the anesthesia service or procedure is partially reduced or not completed as originally planned. |
53 | Discontinued Procedure | Use when the procedure is started but discontinued due to patient instability or other valid reason. |
55 | Postoperative Management Only | Use when the anesthesiologist only provides postop pain management separate from intraoperative anesthesia. |
56 | Preoperative Management Only | Use when anesthesiologist provides only pre-op evaluation and not the intraoperative anesthesia. |
59 | Distinct Procedural Service | Use to indicate a separate, distinct anesthesia service when multiple procedures are reported and services are unrelated. |
62 | Two Surgeons | Use when two surgeons work together as primary surgeons; may affect anesthesia planning for complex combined procedures. |
74 | Return to OR for Related Procedure During Global Period (Anesthesia) | Use when patient returns to the operating/procedure room for a related procedure during the global period. |
78 | Unplanned Return to OR for a Related Procedure During Global Period | Use when an unplanned return to the OR/procedure room is required for a complication related to the original procedure. |
92 | Alternative Billing for Services Delivered Via Synchronous Telemedicine | Use when anesthesia consultation or pre-op evaluation is delivered live via telecommunication in accepted contexts. |
AA | Anesthesia: Medical Direction by Anesthesiologist | Use when the anesthesiologist is physically present and performs medical direction of the anesthesia service. |
AD | Medical Supervision by Anesthesiologist, More than Four Concurrent Anesthetics | Use when supervising more than four concurrent cases. |
QX | CRNA Service: CRNA with Direction by Physician Anesthesiologist | Use when a CRNA provides services under direction applicable to billing rules. |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 207L00000X | Anesthesiology | Primary specialty providing anesthesia services for endoscopic procedures. |
| 207RC0000X | Anesthesiology - Critical Care | Involved for high-risk patients requiring critical care expertise. |
| 207K00000X | Nurse Anesthetist | CRNAs commonly deliver monitored anesthesia care or general anesthesia in endoscopy suites. |
| 207S00000X | Gastroenterology | Proceduralist performing the lower intestinal endoscopic evaluation. |
| 2084P0800X | General Surgery | Surgeons may perform advanced endoscopic or combined procedures in the intestines. |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
K52.9 | Noninfective gastroenteritis and colitis, unspecified | Presents with abdominal pain or bleeding prompting diagnostic colonoscopy. |
K50.90 | Crohn's disease, unspecified, without complications | Indication for colonoscopy to evaluate extent and activity of disease. |
K51.90 | Ulcerative colitis, unspecified, without complications | Colonoscopic assessment for disease severity and surveillance. |
K57.30 | Diverticulosis of large intestine without perforation or abscess without bleeding | Evaluated during colonoscopy for diverticular disease or bleeding. |
R19.5 | Other fecal abnormalities | Symptoms leading to endoscopic evaluation. |
D50.9 | Iron deficiency anemia, unspecified | Common indication for colonoscopy to rule out lower GI bleeding. |
K63.5 | Polyp of colon | Detection and removal frequently performed during colonoscopy. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
00812 | Anesthesia for lower intestinal endoscopic procedures with endoscope introduced into the duodenum | Alternative anesthesia code when endoscope is advanced into the duodenum; closely related based on extent of endoscope insertion. |
00740 | Anesthesia for upper gastrointestinal endoscopic procedures | May be used when combined upper and lower endoscopy are performed during same operative session, requiring separate anesthesia coding considerations. |
45378 | Colonoscopy, flexible, diagnostic, including collection of specimen by brushing or washing, when performed (separate procedure codes exist for biopsy/polypectomy) | The primary gastroenterology procedure typically performed during the anesthetized session; anesthesia code 00811 covers the anesthesia portion. |
45385 | Colonoscopy with removal of tumor(s), polyp(s), or other lesion(s) by snare technique | Therapeutic colonoscopic interventions that may occur during the same session and affect anesthesia time and complexity. |
99152 | Moderate sedation services provided by the physician performing a diagnostic or therapeutic service, initial 15 minutes | Captures non-anesthesia moderate sedation when the proceduralist provides sedation rather than a qualified anesthesia provider; relevant when anesthesia services are not billed. |