CPT 00866: Anesthesia for Adrenal Gland Removal
CPT code 00866 designates anesthesia care for patients undergoing removal of one or both adrenal glands (adrenalectomy). This code is used to report perioperative anesthesia services associated with adrenal gland excision, an important component of complex endocrine and oncologic surgery. Accurate coding of anesthesia for adrenalectomy affects national reimbursements, resource planning, and quality measurement for perioperative care.
Key payers discussed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find benchmarks for common billing and service contexts, an explanation of clinical indications tied to adrenalectomy, and an overview of how this anesthesia code interacts with related procedural services. The publication outlines common modifiers and related claim considerations, typical sites of service, and associated clinical taxonomies for providers and billing teams.
The report provides practical context for coding and billing teams, anesthesiology departments, and payers, emphasizing the clinical setting and service implications without making clinical recommendations. Data not available in the input is noted where applicable.
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Billing Code Overview
CPT code 00866 describes anesthesia services provided for removal of one or both adrenal glands (adrenalectomy). The service type is anesthesia for surgical adrenal gland removal, typically delivered in an inpatient or outpatient operating room setting depending on the surgical approach and patient condition. The code captures the anesthesiologist or anesthesia team’s perioperative management specific to adrenalectomy procedures.
Clinical & Coding Specifications
Clinical Context
A 58-year-old patient with a large, functioning adrenal mass scheduled for unilateral adrenalectomy. The patient presents for preoperative evaluation in the ambulatory surgical center; history includes hypertension controlled with medications and no prior adverse anesthetic reactions. On the day of surgery, the anesthesiology team performs a focused airway and cardiovascular assessment, obtains informed consent for anesthesia, establishes intravenous access, and places standard ASA monitors. General endotracheal anesthesia is induced for laparoscopic removal of the affected adrenal gland. Intraoperative management includes hemodynamic monitoring and vasoactive support for blood pressure fluctuations related to adrenal manipulation. Postoperatively, the patient is extubated in the operating room and transferred to the post-anesthesia care unit for monitoring of pain, electrolyte balance, and hemodynamics.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
50 | Bilateral procedure | When both adrenal glands are removed and billing supports bilateral reporting per payer policy |
62 | Two surgeons | When two surgeons work together as primary surgeons during the adrenalectomy |
78 | Return to OR for related procedure during global period | When the patient returns to the operating room for a related intraoperative complication within the global period |
53 | Discontinued procedure | When anesthesia services are provided but the surgical procedure is terminated or not completed for patient safety |
52 | Reduced services | When anesthesia services are reduced in scope or time compared with the usual full service |
23 | Unusual anesthesia | When an unusually extensive or complex anesthesia service is required (non-emergent) per payer rules |
22 | Unusual procedural services (by surgeon) | When operative complexity requires substantially greater work — may affect anesthesia-related billing when documented and allowed by payer |
AA | Anesthesia by physician | When an anesthesiologist personally performs the anesthesia service |
AD | Medical supervision by physician; more than four concurrent anesthesia procedures | When an anesthesiologist supervises but is not physically present during multiple concurrent anesthetics as defined by payer rules |
QK | Medical direction of 2–4 concurrent anesthesia cases involving qualified personnel | When the anesthesiologist medically directs CRNAs or anesthesiology assistants for 2–4 cases |
QX | CRNA service with medical direction by a physician | When a CRNA performs the anesthesia service under physician medical direction |
QS | Monitored anesthesia care service | When monitored anesthesia care rather than general anesthesia is provided, if applicable |
AS | Physician assistant, nurse practitioner, or clinical nurse specialist service | When a qualifying non-physician anesthesia practitioner bills under allowed circumstances (per payer rules) |
P1 | Healthy patient | To denote ASA Physical Status I when reporting anesthesia payments where PS modifiers are required |
P3 | Severe systemic disease | To denote ASA Physical Status III when required by payer or internal reporting |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
207L00000X | Anesthesiology | Board-certified anesthesiologists provide perioperative anesthesia management for adrenalectomy |
367500000X | Certified Registered Nurse Anesthetist | CRNAs commonly deliver anesthesia services, often under medical direction or supervision |
207RA0401X | Anesthesiology Assistant | Anesthesiology assistants function under anesthesiologist supervision and participate in intraoperative care |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
K63.5 | Polyp of colon | A colonic polyp diagnosis may be present in the medical history from prior GI evaluations; not causally related to adrenalectomy but may influence perioperative planning if recent endoscopic procedures occurred |
K92.2 | Gastrointestinal hemorrhage, unspecified | Prior GI bleeding history may affect perioperative transfusion risk and anesthesia planning if recent or ongoing |
Z12.11 | Encounter for screening for malignant neoplasm of colon | Screening history may be in the record; not directly related to adrenal surgery but part of the patient's diagnostic timeline |
K52.9 | Noninfective gastroenteritis and colitis, unspecified | Recent gastrointestinal illness can affect fluid status and electrolyte balance relevant to perioperative management |
R19.7 | Diarrhea, unspecified | Active diarrhea may impact hydration and electrolyte management before anesthesia for adrenalectomy |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
45378 | Colonoscopy, flexible, diagnostic | Not directly related to adrenalectomy; may appear in the chart if the patient had recent diagnostic colon evaluation as part of preoperative workup or concurrent procedures in multi-disciplinary cases |
45380 | Colonoscopy with biopsy | As above, relevant when colonic biopsy was performed in the same episode of care but not directly related to adrenal gland surgery |
45385 | Colonoscopy with removal of tumor(s), polyp(s), or other lesion(s) | Relevant if a concurrent or prior GI procedure addressed colonic pathology in the same perioperative period; not part of adrenalectomy anesthesia coding |
99152 | Moderate sedation services provided by the same physician | Used when moderate (conscious) sedation is provided by the proceduralist during endoscopic procedures; not typically used for general endotracheal anesthesia for adrenalectomy but may be billed if separate endoscopic procedures occur in the same encounter |