62270

Spinal Puncture, Lumbar, Diagnostic

CPT code 62270 refers to a diagnostic lumbar puncture, also known as a spinal tap, which is a medical procedure performed to collect and analyze cerebrospinal fluid (CSF) from the subarachnoid space in the lumbar region of the spinal column. This procedure is a cornerstone of neurological diagnostics, allowing clinicians to evaluate for infectious diseases such as bacterial or viral meningitis, inflammatory conditions like multiple sclerosis or Guillain-Barre syndrome, and subarachnoid hemorrhages that may not be visible on initial imaging. During the procedure, the patient is positioned either in a lateral decubitus position with the spine flexed to increase the intervertebral space, or in a seated position leaning forward over a bedside table. The clinician identifies the appropriate interspace, typically between L3-L4 or L4-L5, which are safely below the terminus of the spinal cord (conus medullaris) in most adults. After meticulous sterilization and administration of local anesthesia to the skin and deeper tissues, a spinal needle with a stylet is advanced through the skin, subcutaneous fat, the supraspinous and interspinous ligaments, the ligamentum flavum, and the dura mater into the subarachnoid space. Upon entry, the stylet is removed to allow CSF to flow. The clinician may measure the opening pressure using a manometer and then collect fluid into multiple sterile tubes for laboratory analysis, including cell count, protein, glucose, microbiology, and cytology. The needle is then withdrawn, and the site is dressed. This procedure is distinct from therapeutic lumbar punctures (62272) where fluid is drained specifically to reduce intracranial pressure.

Clinical Indications

  • Suspected bacterial, viral, fungal, or tuberculous meningitis
  • Suspected encephalitis
  • Evaluation for subarachnoid hemorrhage in patients with negative CT imaging
  • Diagnosis of demyelinating diseases such as multiple sclerosis
  • Workup for inflammatory polyneuropathies like Guillain-Barre syndrome
  • Diagnostic evaluation of primary or metastatic central nervous system malignancies
  • Measurement of intracranial pressure in suspected pseudotumor cerebri
  • Evaluation for neurosyphilis
  • Assessment of unexplained delirium or altered mental status
  • Diagnostic tap for suspected normal pressure hydrocephalus

Procedure Steps

  1. Verify patient identity and obtain informed consent.
  2. Position the patient in the lateral decubitus position or sitting position with the lumbar spine flexed.
  3. Palpate and identify the L3-L4 or L4-L5 intervertebral space.
  4. Prepare the skin with an antiseptic solution (e.g., chlorhexidine or povidone-iodine) and apply sterile drapes.
  5. Infiltrate the skin and subcutaneous tissue with 1% lidocaine for local anesthesia.
  6. Insert a spinal needle with stylet into the midline of the identified interspace, angling slightly cephalad toward the umbilicus.
  7. Advance the needle until a characteristic 'pop' is felt, indicating penetration of the ligamentum flavum and dura.
  8. Remove the stylet to confirm the flow of clear cerebrospinal fluid (CSF).
  9. Attach a manometer to measure and record the opening pressure if indicated.
  10. Collect CSF dropwise into four sterile collection tubes for analysis.
  11. Reinsert the stylet into the needle once collection is complete.
  12. Withdraw the needle and apply firm pressure to the puncture site.
  13. Apply a sterile adhesive dressing to the site and instruct the patient on post-procedure care.

Coding Guidelines

  • CPT 62270 is specifically for diagnostic spinal punctures; for therapeutic drainage, use 62272.
  • Local anesthesia is included in the procedure and should not be reported separately.
  • If the procedure is performed under fluoroscopic guidance, report 77003 in addition to 62270.
  • If the procedure is performed under CT guidance, report 72275 in addition to 62270.
  • For ultrasound guidance used during the lumbar puncture, report 76942.
  • If a significant, separately identifiable Evaluation and Management (E/M) service is performed on the same day, append modifier 25 to the E/M code.
  • If the physician is unable to complete the procedure after multiple attempts, append modifier 52 (Reduced Services) or 53 (Discontinued Procedure) as appropriate.
  • Do not report 62270 in conjunction with myelography codes (e.g., 62284).

Associated ICD-10 Codes