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Official Description

Paravertebral block (PVB) (paraspinous block), thoracic; single injection site (includes imaging guidance, when performed)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

A thoracic paravertebral block (PVB), also known as a paraspinous block, is a medical procedure designed to provide unilateral anesthesia, primarily for patients undergoing thoracic or breast surgeries, as well as those suffering from chest trauma or rib fractures. The procedure targets the paravertebral space, which is a wedge-shaped compartment located adjacent to the vertebral bodies. This space communicates superiorly and inferiorly across the ribs, allowing for effective anesthesia delivery. The spinal nerves emerge from the intervertebral foramina into the paravertebral space, where they branch laterally into the intercostal nerves and extend medially into the epidural spaces. By performing a thoracic PVB, healthcare providers can achieve ipsilateral somatic and sympathetic nerve blockage, which is beneficial in managing pain while minimizing cardiovascular or respiratory compromise. The procedure is typically performed with the patient positioned either sitting with support or in a lateral decubitus position, with the side to be blocked positioned uppermost. The procedure involves marking the spinous processes on the skin, measuring, and drawing a parasagittal line lateral to the midline. Local anesthetic is then infiltrated into the subcutaneous tissue and paravertebral muscles along this line. Utilizing visual and tactile landmarking, along with ultrasound imaging when indicated, a spinal needle is inserted into the paravertebral space, and local anesthetic is injected to achieve the desired anesthetic effect. Code 64461 specifically reports a single injection site for the thoracic PVB, including any imaging guidance that may be performed during the procedure.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The thoracic paravertebral block (PVB) is indicated for various clinical scenarios, particularly when unilateral anesthesia is required. The following conditions and situations warrant the performance of this procedure:

  • Thoracic Surgery Patients undergoing surgical procedures in the thoracic region may benefit from the pain relief provided by a PVB.
  • Breast Surgery This block is also indicated for patients undergoing breast surgeries, where effective pain management is crucial for recovery.
  • Chest Trauma Individuals with chest trauma may require a PVB to alleviate pain and facilitate breathing.
  • Rib Fractures Patients suffering from rib fractures can experience significant pain, and a PVB can help manage this discomfort effectively.

2. Procedure

The procedure for performing a thoracic paravertebral block involves several key steps to ensure accurate placement and effective anesthesia. The following procedural steps are outlined:

  • Step 1: Patient Positioning The patient is positioned either in a supported sitting position or in a lateral decubitus position, with the side to be blocked in the uppermost position. This positioning facilitates access to the paravertebral space.
  • Step 2: Marking the Skin The healthcare provider marks the spinous processes on the patient's skin to identify the appropriate anatomical landmarks for the injection.
  • Step 3: Drawing the Parasagittal Line A parasagittal line is measured and drawn lateral to the midline, which serves as a guide for the injection site.
  • Step 4: Local Anesthetic Infiltration Local anesthetic is infiltrated into the subcutaneous tissue and paravertebral muscles along the drawn parasagittal line to minimize discomfort during the procedure.
  • Step 5: Needle Insertion Using visual and tactile landmarking, along with ultrasound imaging as indicated, a spinal needle is inserted into the paravertebral space. The needle is carefully advanced to ensure accurate placement.
  • Step 6: Injection of Anesthetic Once the needle is correctly positioned within the paravertebral space, the local anesthetic is injected to achieve the desired anesthetic effect.

3. Post-Procedure

After the thoracic paravertebral block is performed, patients are typically monitored for any immediate adverse reactions or complications. It is essential to assess the effectiveness of the block in providing pain relief. Patients may experience temporary numbness or weakness in the affected area, which is expected. Additionally, instructions regarding activity restrictions and pain management should be provided. Continuous monitoring may be necessary, especially if the procedure was performed in conjunction with other surgical interventions. If a catheter is placed for continuous anesthetic infusion, further instructions on catheter care and management will be required.

Short Descr PVB THORACIC SINGLE INJ SITE
Medium Descr PVB THORACIC SINGLE INJECTION SITE W/IMG GID
Long Descr Paravertebral block (PVB) (paraspinous block), thoracic; single injection site (includes imaging guidance, when performed)
Status Code Active Code
Global Days 000 - Endoscopic or Minor Procedure
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 1 - 150% payment adjustment for bilateral procedures applies.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 1 - Statutory payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Procedure or Service, Multiple Reduction Applies
ASC Payment Indicator Non office-based surgical procedure added in CY 2008 or later; payment based on OPPS relative payment weight.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P6B - Minor procedures - musculoskeletal
MUE 1

This is a primary code that can be used with these additional add-on codes.

64462 Addon Code Resequenced Code MPFS Status: Active Code APC N ASC N1 Paravertebral block (PVB) (paraspinous block), thoracic; second and any additional injection site(s) (includes imaging guidance, when performed) (List separately in addition to code for primary procedure)
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
50 Bilateral procedure: unless otherwise identified in the listings, bilateral procedures that are performed at the same session, should be identified by adding modifier 50 to the appropriate 5 digit code. note: this modifier should not be appended to designated "add-on" codes (see appendix d).
RT Right side (used to identify procedures performed on the right side of the body)
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
GC This service has been performed in part by a resident under the direction of a teaching physician
LT Left side (used to identify procedures performed on the left side of the body)
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
CR Catastrophe/disaster related
FT Unrelated evaluation and management (e/m) visit on the same day as another e/m visit or during a global procedure (preoperative, postoperative period, or on the same day as the procedure, as applicable). (report when an e/m visit is furnished within the global period but is unrelated, or when one or more additional e/m visits furnished on the same day are unrelated)
GA Waiver of liability statement issued as required by payer policy, individual case
GW Service not related to the hospice patient's terminal condition
GZ Item or service expected to be denied as not reasonable and necessary
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
X2 Continuous/focused services: for reporting services by clinicians whose expertise is needed for the ongoing management of a chronic disease or a condition that needs to be managed and followed with no planned endpoint to the relationship; reporting clinician service examples include but are not limited to: a rheumatologist taking care of the patient's rheumatoid arthritis longitudinally but not providing general primary care services
X5 Diagnostic services requested by another clinician: for reporting services by a clinician who furnishes care to the patient only as requested by another clinician or subsequent and related services requested by another clinician; this modifier is reported for patient relationships that may not be adequately captured by the above alternative categories; reporting clinician service examples include but are not limited to, the radiologist's interpretation of an imaging study requested by another clinician
XP Separate practitioner, a service that is distinct because it was performed by a different practitioner
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2016-01-01 Added Added
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