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Clinical Policy Bulletin:
Inpatient Admission Prior to Surgery (Preop Days)
Number: 0255


Aetna considers inpatient hospital admission on days prior to surgery medically necessary when any of the following criteria is met:

  • A cardiac catheterization or a major surgical procedure scheduled within 24 hours for a child less than 1 year of age which requires intravenous fluids to achieve and maintain adequate hydration prior to the procedure; or
  • A planned major surgical procedure which requires an extensive bowel preparation (GoLytely, laxatives, multiple enemas) in a member with a co-morbidity (e.g., chronic renal failure, elderly individual with muscle wasting and poor nutritional status resulting in a significant weight loss of greater than 10 %) whose condition places the individual at high-risk for electrolyte and fluid imbalances; or
  • A planned surgical procedure on partially obstructed bowel which requires a slow but extensive bowel preparation pre-operatively; or
  • An invasive diagnostic procedure (e.g., aortogram, arteriogram or cardiac catheterization, myelogram) with major surgery scheduled for the following day; or
  • Close monitoring of blood sugars is required to provide adequate adjustment of regular insulin coverage in preparation for an operative procedure in a brittle insulin-dependent diabetic member (i.e., diabetic individuals who experience large, unpredictable changes in blood glucose, within short periods of time, as a result of very small deviations from schedule); or
  • Placement of fiducials (small screws) prior to stereotactic brain surgery; or
  • The member has a concurrent medical problem that requires specific inpatient treatment prior to major surgery (defined as craniotomy, laparotomy, median sternotomy, or thoracotomy) to reduce the operative risk or assure a more favorable outcome; or
  • The member is scheduled for an open heart procedure requiring cardiopulmonary bypass (cardiac valve replacement or repair, coronary artery bypass grafting) and has unstable angina, congestive heart failure, severe hypertension, or significant ventricular arrhythmias; or
  • The member requires conversion from coumadin to intravenous heparin (not subcutaneous heparin) (see CPB 0200 - Coumadin (Warfarin) to Heparin Conversion Before and After Elective Surgery) for a surgical procedure planned for the next day (individuals with mitral valve disease, especially with atrial fibrillation, may require 2 pre-operative days); or
  • The member requires intravenous steroid preparation for protection against a previously documented allergic reaction to dye prior to intravascular administration of dye necessary to perform a diagnostic study or operative procedure; or
  • The member requires intravenous steroid preparation, intravenous anti-convulsant protection, or osmotic diuresis prior to a craniotomy scheduled for the following day (e.g., intracranial arterio-venous malformations).

Hospitalization Prior to Transplant:

Members awaiting transplants are commonly hospitalized prior to surgery.  Hospitalization of such individuals, however, is only considered medically necessary when the member has needs that justify inpatient confinement.  Assessment of the medical necessity of hospitalization prior to transplant surgery is performed using the same criteria that are considered in assessing the medical necessity of hospitalization for other conditions.

CPT Codes / HCPCS Codes / ICD-9 Codes
Other CPT codes related to the CPB:
32096 - 32160
33010 - 33980
49000 - 49002
61304 - 61576
75600 - 75630
93451- 93454
Other HCPCS codes related to the CPB:
A4648 Tissue marker, implantable, any type, each
G0173 Linear accelerator based stereotactic radiosurgery, complete course of therapy in one session
G0251 Linear accelerator based stereotactic radiosurgery, delivery including collimator changes and custom plugging, fractionated treatment, all lesions, per session, maximum five sessions per course of treatment
G0339 Image-guided robotic linear accelerator-based stereotactic radiosurgery, complete course of therapy in one session or first session of fractionated treatment
G0340 Image-guided robotic linear accelerator-based sterotactic radiosurgery, delivery including collimator changes and custom plugging, fractionated treatment, all lesions, per session, second through fifth sessions, maximum five sessions per course of treatment
Other ICD-9 codes related to the CPB:
250.00 - 250.93 Diabetes mellitus
276.0 - 276.9 Disorders of fluid, electrolyte, and acid-base balance
394.0 - 394.9 Diseases of mitral valve
396.0 - 396.9 Diseases of mitral and aortic valves
401.0 - 405.99 Hypertensive disease
411.1 Intermediate coronary syndrome
424.0 Mitral valve disorders
427.0 - 427.9 Cardiac dysrhythmias
428.0 Congestive heart failure, unspecified
560.0 - 560.9 Intestinal obstruction without mention of hernia
585.1 - 585.9 Chronic kidney disease
728.2 Muscular wasting and disuse atrophy, not elsewhere classified
747.81 Anomalies of cerebrovascular system
V15.08 Personal history of allergy to radiographic dye
V58.61 Long-term (current) use of anticoagulants

The above policy is based on the following references:
  1. Bach DS. Management of specific medical conditions in the perioperative period. Prog Cardiovasc Dis. 1998;40(5):469-476.
  2. Arom KV, Emery RW, Petersen RJ, et al. Patient characteristics, safety, and benefits of same-day admission for coronary artery bypass grafting. Ann Thorac Surg. 1996;61(4):1136-1139.
  3. Schiff RL, Emanuelle MA. The surgical patient with diabetes mellitus: Guidelines for management. J Gen Intern Med. 1995;10:154-161.
  4. Becker RC, Ansell J. Antithrombotic therapy: An abbreviated reference for clinicians. Arch Intern Med. 1995;155:149-161.
  5. Kellerman PS. Perioperative care of the renal patient. Arch Intern Med. 1994;154:1674-1688.
  6. McCallion J, Krenis LJ. Preoperative cardiac evaluation. Am Fam Physician. 1992;45(4):1723-1732.
  7. American Society of Anesthesiologists (ASA). Basic Standards for Preanesthesia Care. Park Ridge, IL: ASA; October 14, 1987.
  8. Kroenke K. Preoperative evaluation: The assessment and management of surgical risk. J Gen Intern Med. 1987;2:257-269.
  9. Merli GJ, Weitz HH. Approaching the surgical patient. Role of the medical consultant. Clin Chest Med. 1993;14(2):205-210.
  10. Cygan R, Waitzkin H. Stopping and restarting medications in the perioperative period. J Gen Intern Med. 1987;2:270-283.

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Copyright Aetna Inc. All rights reserved. Clinical Policy Bulletins are developed by Aetna to assist in administering plan benefits and constitute neither offers of coverage nor medical advice. This Clinical Policy Bulletin contains only a partial, general description of plan or program benefits and does not constitute a contract. Aetna does not provide health care services and, therefore, cannot guarantee any results or outcomes. Participating providers are independent contractors in private practice and are neither employees nor agents of Aetna or its affiliates. Treating providers are solely responsible for medical advice and treatment of members. This Clinical Policy Bulletin may be updated and therefore is subject to change.
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