Summary & Overview
CPT 61050: Cisternal or Lateral Cervical Puncture for CSF Access
CPT code 61050 designates a cisternal or lateral cervical puncture to access cerebrospinal fluid (CSF) for pressure measurement, fluid removal, or specimen collection without injection of agents. This procedure is clinically important for diagnosing and managing neurological conditions such as infectious, inflammatory, hemorrhagic, or pressure-related disorders of the central nervous system. Nationally, accurate coding of 61050 affects clinical documentation, care pathways, and claims processing for complex neurodiagnostic care delivered in hospitals and specialty centers.
Key payers reviewed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context and service settings, typical payer coverage considerations, and common billing modifiers applied to procedural services. The publication provides benchmarks and policy-relevant details where available, plus guidance on how 61050 aligns with related neurosurgical and neurodiagnostic services. Content is organized to support revenue cycle, coding, and clinical teams seeking clarity on when and how this invasive CSF access procedure is reported and documented. Data not available in the input is identified as such for transparency.
Billing Code Overview
CPT code 61050 describes a diagnostic and therapeutic cerebrospinal fluid (CSF) access procedure performed by inserting a needle at the craniocervical junction (cisternal puncture) or via a high cervical approach (lateral cervical puncture). The service involves accessing CSF to measure intracranial pressure, remove excess CSF, and/or collect fluid samples for laboratory analysis. The provider does not inject a diagnostic or therapeutic agent during this procedure.
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Service type: Invasive diagnostic/therapeutic CSF access procedure
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Typical site of service: Hospital inpatient or outpatient setting, emergency department, or procedure suite where sterile neurosurgical or neurodiagnostic procedures are performed
Clinical & Coding Specifications
Clinical Context
A 52-year-old male presents to the neurological service with acute severe headache, neck stiffness, and declining level of consciousness following a suspected subarachnoid hemorrhage at an outside facility. Neuroimaging (CT head) demonstrates ventricular enlargement and blood products in the basal cisterns. The neurosurgeon elects to perform a cisternal puncture to measure intracranial pressure, remove excess cerebrospinal fluid (CSF) to relieve mass effect, and obtain CSF samples for cell count, chemistry, and microbiology.
The clinical workflow: the patient is evaluated in the emergency department and consented for the procedure. Pre-procedure checks include coagulation profile, platelet count, and cranial imaging review. The patient is brought to an operating room or interventional radiology suite (depending on institutional practice) and is positioned supine with head stabilized. Under sterile technique and appropriate anesthesia (local with sedation or general anesthesia), the provider inserts a spinal needle at the craniocervical junction (cisternal puncture) or a high cervical lateral approach to access CSF. CSF pressure is measured, fluid is aliquoted for laboratory studies, and therapeutic drainage is performed as indicated. Post-procedure, the patient is monitored in a recovery area or intensive care unit for neurologic status, CSF leak, bleeding, and infection. Documentation includes indication, informed consent, approach used (cisternal vs lateral cervical), anesthesia, findings (opening pressure, CSF appearance), volumes removed, and specimens sent to the lab.
Coding Specifications
| Modifier | Description | When to Use |
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