Summary & Overview
CPT 00635: Anesthesia for Lumbar Puncture Procedures
CPT code 00635 covers anesthesia for diagnostic or therapeutic lumbar puncture procedures, a critical service in the management of spinal and neurological conditions. This code is widely used in inpatient hospital settings, reflecting its importance in acute care and complex cases. Nationally, the code is recognized by major commercial payers including Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare, ensuring broad coverage for patients requiring lumbar puncture anesthesia.
This publication provides a comprehensive overview of CPT code 00635, including payer coverage, clinical context, and relevant billing modifiers. Readers will gain insight into the typical clinical scenarios where lumbar puncture anesthesia is indicated, such as for patients with intervertebral disc displacement, spinal stenosis, or chronic low back pain. The article also highlights associated taxonomies for anesthesia professionals and outlines related CPT codes for similar spinal procedures. Key policy updates and reimbursement benchmarks are discussed to inform stakeholders about current trends and requirements in medical billing for anesthesia services on the spine and spinal cord.
Healthcare professionals, administrators, and policy analysts will find this summary useful for understanding the national landscape of lumbar puncture anesthesia billing, payer coverage, and clinical indications.
CPT Code Overview
CPT code 00635 is used to report anesthesia services for procedures in the lumbar region, specifically for diagnostic or therapeutic lumbar punctures. This code falls under the Anesthesia – Procedures on the Spine and Spinal Cord service type. The typical site of service for procedures billed under CPT code 00635 is the Inpatient Hospital setting (Place of Service 21).
Clinical & Coding Specifications
Clinical Context
A patient is admitted to an inpatient hospital for evaluation and management of lumbar spine-related symptoms, such as chronic low back pain, radiculopathy, or suspected spinal stenosis. The clinical workflow involves a diagnostic or therapeutic lumbar puncture performed in the lumbar region. An anesthesia provider, such as an anesthesiologist, certified registered nurse anesthetist, or anesthesiology assistant, administers anesthesia to ensure patient comfort and safety during the procedure. The anesthesia service is documented and coded using CPT code 00635.
Coding Specifications
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Modifiers:
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QS: Monitored anesthesia care service. Used when the anesthesia provider delivers monitored anesthesia care during the lumbar puncture procedure. -
QX: CRNA service with medical direction by a physician. Used when a certified registered nurse anesthetist provides anesthesia under the medical direction of a physician.
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Provider Taxonomies:
| Taxonomy Code | Specialty Name |
|---|---|
207L00000X | Anesthesiology |
367500000X | Certified Registered Nurse Anesthetist |
207RA0401X | Anesthesiology Assistant |
Related Diagnoses
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M51.26: Other intervertebral disc displacement, lumbar region- Relevant for patients undergoing lumbar puncture due to disc displacement causing neurological symptoms.
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M48.06: Spinal stenosis, lumbar region- Indicates lumbar spinal stenosis, which may necessitate diagnostic lumbar puncture to assess neurological function or relieve symptoms.
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M54.5: Low back pain- Common indication for lumbar puncture when pain is unexplained or to rule out other causes.
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G89.29: Other chronic pain- Used when lumbar puncture is performed as part of chronic pain management or evaluation.
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M54.16: Radiculopathy, lumbar region- Suggests nerve root involvement in the lumbar region, potentially requiring lumbar puncture for diagnosis or therapy.
Related CPT Codes
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01936: Anesthesia for percutaneous image guided procedures on the spine and spinal cord; therapeutic- This code is used for anesthesia services during percutaneous, image-guided therapeutic procedures on the spine and spinal cord. It is related to CPT code
00635as both involve anesthesia for spinal procedures, but01936is specific to percutaneous, image-guided interventions, whereas00635is for lumbar puncture. These codes may be used as alternatives depending on the procedure performed, but are not typically billed together.
- This code is used for anesthesia services during percutaneous, image-guided therapeutic procedures on the spine and spinal cord. It is related to CPT code
National Reimbursement Benchmarks
National mean rates for CPT code 00635 show that Blue Cross Blue Shield and Cigna have the highest average reimbursement, with Cigna at $248.08 and Blue Cross Blue Shield at $228.86. UnitedHealth Group is notably lower at $65.59, while the average commercial rate (BUCA) stands at $134.52. Medicare rates are not available in the input for comparison.
Rate dispersion varies significantly across payers. Blue Cross Blue Shield has the tightest range between the 25th and 75th percentiles ($123.50), indicating more consistent reimbursement. Aetna and Cigna display much wider ranges ($278.33 and $259.00, respectively), reflecting greater variability in payment amounts. UnitedHealth Group and BUCA have moderate dispersion, with ranges of $25.42 and $149.03.
The table and chart below present a detailed breakdown of national benchmarks for each payer, including mean rates and percentile values.
State Benchmarks
State: AK1 / 50
Alaska Benchmarks
Alaska exhibits a wide rate spread for CPT code 00635, particularly with Blue Cross Blue Shield, where the 75th percentile ($300.00) is $74.20 higher than the 25th percentile ($225.80). BUCA also shows a substantial spread of $126.00 between its 75th and 25th percentiles. In contrast, Aetna, Cigna, and UnitedHealth Group have minimal spreads, with all percentiles clustered closely together, indicating less variability in reimbursement rates among these payers.
Compared to national averages, Alaska's mean rates for Blue Cross Blue Shield and BUCA are notably higher, while Cigna and UnitedHealth Group are below their respective national means. The table and chart below present the full breakdown of payer-specific reimbursement benchmarks for Alaska.
Key Insights for Alaska
- Blue Cross Blue Shield is the highest paying payer in Alaska for CPT 00635, with a mean rate of $268.93.
- UnitedHealth Group offers the lowest mean rate at $75.12.
- Alaska's mean rates for most payers are higher than national averages, especially for Blue Cross Blue Shield and BUCA.
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