Summary & Overview
CPT 00634: Anesthesia for Thoracic Spine and Cord Procedures
CPT code 00634 is used to report anesthesia services for procedures involving the thoracic spine and spinal cord when no specific procedure is otherwise described. This code is significant for hospitals and providers specializing in spinal surgery, as it ensures accurate billing and reimbursement for complex anesthesia care. Nationally, the code is recognized by major payers such as Blue Cross Blue Shield and Cigna Health, reflecting its widespread applicability in inpatient hospital settings.
This publication provides a comprehensive overview of CPT 00634, including its clinical context, typical site of service, and associated billing practices. Readers will gain insight into payer coverage, common modifiers, and related codes, as well as the relevant taxonomies and ICD-10 diagnoses frequently linked to thoracic spine procedures. The article also highlights policy updates and benchmarks that impact anesthesia billing for spinal interventions, offering clarity for healthcare administrators, billing professionals, and clinical teams. By understanding the nuances of CPT 00634, stakeholders can ensure compliance and optimize documentation for anesthesia services in thoracic spine procedures.
CPT Code Overview
CPT 00634 is designated for anesthesia services provided during procedures on the thoracic spine and spinal cord that are not otherwise specified. This code falls under the anesthesiology service type and is most commonly utilized in the inpatient hospital setting (POS 21). The code is essential for accurately reporting and reimbursing anesthesia care for complex spinal interventions, ensuring proper documentation and compliance within hospital environments.
Clinical & Coding Specifications
Clinical Context
A typical patient scenario involves an adult patient admitted to an inpatient hospital for a surgical procedure on the thoracic spine and spinal cord. The patient may present with symptoms such as back pain, neurological deficits, or signs of spinal cord compression. Common underlying conditions include spinal stenosis, intervertebral disc disorders with myelopathy, or unspecified diseases of the spinal cord. The anesthesiology team provides anesthesia services for the procedure, ensuring patient safety and comfort throughout the operation. The workflow includes preoperative assessment, administration of anesthesia, intraoperative monitoring, and postoperative care.
Coding Specifications
| Modifier Code | Description | When Used |
|---|---|---|
QS | Monitored anesthesia care service | Used when anesthesia is provided as monitored anesthesia care rather than general anesthesia. |
QX | CRNA service with medical direction by a physician | Used when a Certified Registered Nurse Anesthetist (CRNA) provides anesthesia services under the medical direction of a physician. |
Associated Provider Taxonomies:
207L00000X- Anesthesiology: Physicians specializing in anesthesia care.207LA0401X- Pain Medicine (Anesthesiology): Physicians with expertise in pain management within anesthesiology.367500000X- Certified Registered Nurse Anesthetist: Advanced practice nurses certified in anesthesia care.
Related Diagnoses
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M48.06- Spinal stenosis, lumbar region- Indicates narrowing of the spinal canal in the lumbar region, which may necessitate thoracic spine procedures if pathology extends or overlaps.
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M51.06- Intervertebral disc disorders with myelopathy, lumbar region- Refers to disc disorders causing spinal cord dysfunction; relevant if surgical intervention is required in the thoracic region.
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G95.9- Disease of spinal cord, unspecified- Used for cases where the exact spinal cord pathology is unclear but surgery is indicated.
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M54.5- Low back pain- Common presenting symptom that may lead to further investigation and surgical intervention on the thoracic spine.
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M47.812- Spondylosis without myelopathy or radiculopathy, cervical region- Degenerative changes in the cervical spine; may be relevant in differential diagnosis or when multiple spinal regions are involved.
Related CPT Codes
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00630- Anesthesia for procedures on the cervical spine and cord- Used for anesthesia services during cervical spine procedures; similar in scope to
00634but for a different anatomical region.
- Used for anesthesia services during cervical spine procedures; similar in scope to
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00635- Anesthesia for procedures on the thoracic spine and cord; laminectomy- Used when the procedure specifically involves a laminectomy on the thoracic spine; may be used as an alternative or in conjunction with
00634depending on the surgical approach.
- Used when the procedure specifically involves a laminectomy on the thoracic spine; may be used as an alternative or in conjunction with
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63047- Laminectomy, facetectomy and foraminotomy- Represents the surgical procedure for which anesthesia is provided; commonly paired with
00634or00635in clinical workflow.
- Represents the surgical procedure for which anesthesia is provided; commonly paired with
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22830- Exploration of spinal fusion- Used when the surgical procedure involves exploration of a prior spinal fusion; anesthesia services for this procedure may be coded with
00634if performed on the thoracic spine.
- Used when the surgical procedure involves exploration of a prior spinal fusion; anesthesia services for this procedure may be coded with
National Reimbursement Benchmarks
Nationally, the mean rate for CPT code 00634 is substantially higher for BUCA (average commercial) payers compared to Medicare, with BUCA at $873.27 and no Medicare data available in the input. Blue Cross Blue Shield and Cigna also show significant differences, with Cigna's mean rate at $1,318.49 and Blue Cross Blue Shield at $80.02.
Rate dispersion varies widely across payers. Blue Cross Blue Shield exhibits the tightest range, with all percentiles at $80.00, indicating no variation. Cigna and BUCA display much broader ranges, with Cigna's 25th to 75th percentile spanning $237.50 and BUCA's range at $1,355.00. This highlights considerable variability in commercial reimbursement rates.
The table and chart below present the full breakdown of national benchmarks for CPT code 00634 by payer.
State Benchmarks
State: AK1 / 49
Alaska Benchmarks
For CPT code 00634, Alaska shows a pronounced rate spread between payers. Blue Cross Blue Shield exhibits no rate spread, with all percentiles at $80.00, while Cigna's rates are consistently $869.50 across all percentiles, resulting in a rate spread of $0 for both payers. Compared to national averages, Cigna's mean rate in Alaska is lower than its national mean, while Blue Cross Blue Shield's mean rate is nearly identical to its national average.
The table and chart below present the full breakdown of mean rates and percentiles for each payer in Alaska, highlighting the significant difference between Blue Cross Blue Shield and Cigna for CPT code 00634.
Key Insights for Alaska
- Cigna is the highest paying payer for CPT 00634 in Alaska, with a mean rate of $869.50.
- Blue Cross Blue Shield is the lowest paying payer, with a mean rate of $80.82.
- Cigna's mean rate in Alaska is significantly higher than both the state and national averages for Blue Cross Blue Shield, highlighting a substantial deviation.
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