Summary & Overview
CPT 61543: Hemispherectomy or Extensive Cerebral Resection
CPT code 61543 represents an extensive neurosurgical procedure involving elevation of a skull bone flap and partial or total removal of a cerebral hemisphere. This is a high-acuity, resource-intensive operative service performed for life‑ or function‑threatening neurologic disease such as intractable seizures, large tumors, or severe unilateral pathology. Nationally, this code is significant because it captures complex inpatient neurosurgery with substantial implications for hospital resource use, postoperative care pathways, and payer coverage policies.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context, typical settings of care, and the types of benchmarks and policy elements commonly associated with such procedures. The publication outlines typical sites of service and service line classification, summarizes common modifier usage where available, and highlights areas often addressed in payer medical necessity and authorization policies.
This summary is intended to help clinicians, coding professionals, and policy analysts understand the clinical scope of CPT code 61543, what to expect in terms of service delivery, and which national payers commonly manage coverage for these high‑complexity neurosurgical interventions. Data not available in the input will be noted explicitly in relevant sections of the full publication.
Billing Code Overview
CPT code 61543 describes a neurosurgical procedure in which the surgeon elevates a portion of the skull bone (craniectomy/craniotomy component) and partially or totally removes the affected cerebral hemisphere. The service is a major intracranial resective surgery for removal of brain tissue (hemispherectomy or extensive cortical resection).
The typical site of service is an inpatient acute care hospital, frequently performed in an operating room with postoperative care in an intensive care unit or neurosurgical ward. Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A typical patient is a 6–18 year-old child or adult with medically refractory, life‑threatening hemispheric epilepsy, malignant cerebral edema after large territorial stroke, or destructive hemispheric pathology (e.g., Rasmussen encephalitis, hemimegalencephaly) who is evaluated for hemispherotomy/functional hemispherectomy. The clinical workflow begins with comprehensive neurologic assessment, seizure semiology documentation, prolonged video EEG monitoring, and high-resolution MRI to localize unilateral diffuse hemispheric dysfunction. Multidisciplinary review (neurology, neurosurgery, neuroradiology, neuropsychology) assesses candidacy. Preoperative optimization includes informed consent, baseline neuropsychological testing, and medical clearance. On the day of surgery, anesthesia and intraoperative neuromonitoring are performed. The surgeon elevates a portion of skull bone (craniotomy) and proceeds with partial or complete functional hemispherectomy or hemispherotomy to disconnect or remove the affected hemisphere. Postoperative care includes ICU monitoring, seizure control management, rehabilitation (physical, occupational, speech therapy), serial imaging, and outpatient follow-up for neurologic and developmental outcomes.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Normal/standard procedural services | Use when this procedure is performed as the primary, uncomplicated service without unusual circumstances. |