CPT 61020 Ventricular CSF Aspiration Reimbursement | OpenPayer

Summary & Overview

CPT 61020: Ventricular CSF Aspiration Without Injection

CPT code 61020 covers ventricular cerebrospinal fluid (CSF) aspiration performed by inserting a needle through an existing burr hole, fontanelle, coronal suture, or internal ventricular drain to withdraw CSF for pressure measurement, therapeutic drainage, or laboratory testing. This procedure is clinically important for diagnosing and managing neurologic conditions such as infection, hemorrhage, hydrocephalus, and intracranial hypertension. Nationally, accurate coding of this service affects hospital and critical care billing, clinical documentation, and quality measurement for neurosurgical and neurocritical care services.

Key payers in typical coverage analyses include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical setting and service type, common billing and modifier considerations, and contextual notes that clarify where and how the procedure is typically performed. The publication summarizes payer coverage patterns and benchmarks where available and highlights policy and coding clarifications relevant to hospital-based neurosurgical and intensive care workflows. The goal is to provide clinicians, coders, and hospital administrators with a clear, national-level reference for CPT code 61020 and its role in neurodiagnostic and therapeutic care.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 61020ventricular CSF aspirationneurosurgeryneurocritical carediagnostic procedurehospital inpatientprocedure codingCSF pressure measurementventricular drain

Billing Code Overview

CPT code 61020 describes needle access to a cerebral ventricle to withdraw cerebrospinal fluid (CSF) for testing without injection of any substance. The provider inserts a needle through a previously created burr hole, a fontanelle, a coronal suture, or an existing internal ventricular drain to measure intracranial pressure, remove excess CSF, or collect samples for laboratory analysis of neurological conditions.

Service type: Diagnostic and therapeutic ventricular CSF aspiration
Typical site of service: Inpatient or outpatient hospital setting, procedure room, or intensive care unit where access to cranial burr holes or ventricular drains is available

Clinical & Coding Specifications

Clinical Context

A typical patient is a hospitalized adult or child with suspected central nervous system infection, elevated intracranial pressure monitoring needs, or evaluation of shunt or drain function. For example, a 56-year-old male with fever, headache, nuchal rigidity, and altered mental status admitted to the neurology service. Neuroimaging demonstrated ventricular enlargement and an external ventricular drain (EVD) was already in place from a prior neurosurgical procedure. The neurosurgeon or critical care team performs a ventricular tap through the existing burr hole or EVD to withdraw cerebrospinal fluid (CSF) for cell count, culture, glucose/protein analysis, and opening pressure measurement. The clinical workflow includes review of recent imaging and coagulation status, informed consent, sterile prep at the bedside or in the operating room, insertion of a sterile needle through a previously created burr hole or via the internal ventricular drain system, measurement of opening pressure if indicated, aspiration of CSF without instillation of any fluid, labeling and routing CSF samples to the laboratory, and documentation of indication, technique, volume obtained, opening pressure, complications, and patient tolerance.

Coding Specifications

Modifier	Description	When to Use
`11`	Normal, e.g., routine service	Use when this ventricular tap is the routine, expected service provided by the reporting practitioner.

CPT 61055: Occipitoatlantal / Atlantoaxial Joint Injection

CPT-61000-INITIAL-DURAL-PUNCTURE-FONTANELLE-CORONAL-SUTURE

CPT 61000: Initial Dural Puncture Through Fontanelle or Coronal Suture

CPT-61026-VENTRICULAR-NEEDLE-ACCESS-DIAGNOSTIC-THERAPEUTIC

CPT 61026: Ventricular Needle Access for Diagnostic or Therapeutic CSF Procedures

CPT-61070-SHUNT-TAP-CSF-ACCESS-AND-PRESSURE-ASSESSMENT

CPT 61070: Shunt Tap for CSF Access and Pressure Assessment

CPT-61001-INFANT-FONTANELLE-DURAL-PUNCTURE-DRAINAGE

CPT 61001: Subsequent Dural Puncture/Drainage via Fontanelle or Coronal Suture

CPT-61050-CISTERNAL-OR-LATERAL-CERVICAL-PUNCTURE-CSF-ACCESS

CPT 61050: Cisternal or Lateral Cervical Puncture for CSF Access

Taxonomy Code	Specialty	Notes
2084P0800X	Neurological Surgery	Neurosurgeons commonly perform ventricular taps through burr holes or existing drains.
208000000X	Neurology	Neurologists in critical care settings may perform or direct CSF sampling and pressure monitoring.
207RX0000X	Critical Care Medicine	Critical care intensivists manage EVDs and may perform bedside ventricular taps in ICU.
363L00000X	Clinical Neurophysiology	Specialists may be involved in diagnostic correlation though they less commonly perform the procedure.
2086S0123X	Pediatric Neurosurgery	Pediatric neurosurgeons perform ventricular taps in infants via fontanelle or existing burr holes.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`G00.9`	Bacterial meningitis, unspecified	Common indication for CSF aspiration to obtain cultures and cell counts.
`G03.9`	Meningitis, unspecified	Used when meningitis is suspected and ventriculostomy or ventricular tap is needed for diagnosis.
`G91.0`	Communicating hydrocephalus	Ventricular tap may be performed to measure pressure and relieve excess CSF.
`G91.2`	Normal-pressure hydrocephalus	CSF removal can be diagnostic or therapeutic and to assess symptom response.
`R56.9`	Unspecified convulsions	Seizures with concern for CNS infection or increased intracranial pressure prompting CSF sampling.
`T85.698A`	Other mechanical complication of other internal prosthetic devices, implants and grafts, initial encounter	Used when an internal ventricular drain or shunt malfunctions and tapping the ventricle is needed for evaluation.
`I60.9`	Subarachnoid hemorrhage, unspecified	Evaluation of CSF for blood breakdown products or pressure management in hemorrhagic cases.
`G07`	Intracranial and intraspinal abscess and granuloma	CSF sampling can help identify infectious organisms in deep CNS infections.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61020`	Ventricular tap, diagnostic; through existing burr hole, fontanelle, coronal suture or internal ventricular drain (aspiration of cerebrospinal fluid)	Primary code described — aspiration of CSF without instillation.
`60505`	Aspiration or biopsy, intracranial; ventricular (e.g., via fontanelle)	Related intracranial aspiration procedures in certain pediatric or diagnostic contexts; used when tissue sampling or alternative ventricular approach is performed.
`61254`	Repair of cerebrospinal fluid leak, intracranial; with graft or flap	Performed when a ventricular access results in a CSF leak requiring surgical repair after or during access.
`61010`	Lumbar puncture, diagnostic; without imaging guidance	Often performed as an alternative CSF sampling method when ventricular access is not required or feasible.
`62230`	Insertion of temporary external ventricular drain (EVD), includes removal when performed as part of the same session	Frequently performed before or after diagnostic taps when ongoing drainage or monitoring of intracranial pressure is required.
`76898`	Ultrasound, surgical, intraoperative, any type; guidance for needle placement	Used when ultrasound guidance is employed for ventricular access in select situations (e.g., neonatal fontanelle taps).

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