Certified Professional Coder (CPC) Quiz: Apply Brain Surgery Coding Rules
20 questions · exam conditions
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Apply Brain Surgery Coding RulesQuestion 1 of 20

A neurosurgeon documents removal of a 3.5 cm primary malignant brain tumor located in the temporal lobe via craniotomy. Which CPT® code range covers craniotomy for tumor excision?

61105-61108
61304-61316
61510-61530
61700-61711
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Certified Professional Coder (CPC) Quiz

Certified Professional Coder (CPC) Quiz: Apply Brain Surgery Coding Rules

Practice Apply Brain Surgery Coding Rules in Certified Professional Coder (CPC) with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Apply Brain Surgery Coding Rules, giving you a quick way to practice the rules, question types, and explanations that matter most for Certified Professional Coder (CPC).

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

A neurosurgeon documents removal of a 3.5 cm primary malignant brain tumor located in the temporal lobe via craniotomy. Which CPT® code range covers craniotomy for tumor excision?

  1. 61105-61108
  2. 61304-61316
  3. 61510-61530 (correct answer)
  4. 61700-61711
Explanation: CPT® codes 61510-61530 cover craniotomy for tumor excision. Code 61510 covers craniotomy with excision of a brain tumor, supratentorial; 61512 covers infratentorial tumor excision. The location of the tumor (supratentorial vs. infratentorial) drives code selection within this range.

Question 2

The ICD-10-CM code for a primary malignant neoplasm of the frontal lobe is reported using which code range?

  1. C71.0-C71.9 (correct answer)
  2. D43.0-D43.9
  3. G35-G37
  4. C79.31-C79.32
Explanation: ICD-10-CM category C71 covers malignant neoplasms of the brain. C71.0 is the frontal lobe; C71.1 is temporal lobe; C71.2 is parietal lobe; C71.3 is occipital lobe. D43 covers uncertain neoplasms of the brain; C79.31 covers secondary (metastatic) malignant neoplasm of the brain. Primary vs. secondary status and specific lobe location both affect code selection.

Question 3

The operative note states: "A cranioplasty was performed using a methyl methacrylate implant to repair the cranial defect." Which CPT® code range covers cranioplasty procedures?

  1. 61304-61316
  2. 61316-61340
  3. 62000-62010
  4. 62140-62148 (correct answer)
Explanation: CPT® codes 62140-62148 cover cranioplasty procedures, including repair of cranial defects. Code 62140 covers cranioplasty for skull defect; 62141 adds bone graft; 62142 covers removal of bone flap; 62143 covers replacement of bone flap. The 61304 range is for craniotomy, not reconstruction.

Question 4

A neurosurgeon performs a craniotomy for excision of a meningioma located in the cerebellopontine angle. The approach involves the posterior cranial fossa. Which CPT® code range covers posterior fossa approach procedures for skull base surgery?

  1. 61580–61583
  2. 61590–61592
  3. 61595–61597 (correct answer)
  4. 61600–61601
Explanation: CPT® codes 61595–61597 cover posterior cranial fossa/foramen magnum approach procedures for skull base surgery. Codes 61580–61583 cover anterior cranial fossa approaches; 61590–61592 cover middle cranial fossa approaches; 61600–61601 cover resection/excision at the anterior cranial fossa.

Question 5

A neurosurgeon places a burr hole for intracranial pressure (ICP) monitoring following a traumatic brain injury. Which CPT® code range covers burr hole procedures?

  1. 61000-61070
  2. 61105-61253 (correct answer)
  3. 61304-61340
  4. 61500-61530
Explanation: CPT® codes 61105-61253 cover trephine and burr hole procedures, including placement for drainage, biopsy, and monitoring. Code 61107 specifically covers twist drill or burr hole for intracranial monitoring device placement. The 61304-61340 range covers craniotomy/craniectomy procedures.

Question 6

A patient undergoes deep brain stimulation (DBS) electrode implantation into the subthalamic nucleus for Parkinson's disease. Which CPT® code range covers implantation of intracranial neurostimulator electrodes?

  1. 61700–61711
  2. 61850–61875 (correct answer)
  3. 62270–62280
  4. 63650–63655
Explanation: CPT® codes 61850–61875 cover implantation of neurostimulator electrodes in the brain, including deep brain stimulation. Code 61863 covers stereotactic implantation of neurostimulator electrode array in subcortical site, one array. Spinal neurostimulator electrodes are found in the 63650–63655 range.

Question 7

The operative report documents a ventriculoperitoneal (VP) shunt placement for hydrocephalus. Which CPT® code range covers CSF shunting procedures?

  1. 61700-61711
  2. 62000-62010
  3. 62180-62258 (correct answer)
  4. 63740-63746
Explanation: CPT® codes 62180-62258 cover cerebrospinal fluid (CSF) shunting procedures, including ventriculoperitoneal, ventriculoatrial, and lumboperitoneal shunts. Code 62223 covers creation of shunt from ventricle to peritoneal cavity. The 62000 range covers skull fractures, not shunts.

Question 8

A craniotomy for clipping of an intracranial aneurysm is performed. When coding intracranial aneurysm surgery, which factor most significantly affects code selection within the aneurysm clipping range?

  1. Patient age
  2. Aneurysm size and location (carotid circulation vs. vertebrobasilar) (correct answer)
  3. Number of aneurysms clipped
  4. Whether the procedure is performed emergently
Explanation: CPT® aneurysm clipping codes (61700–61711) are differentiated by location: carotid circulation (intradural, 61700) versus vertebrobasilar circulation (61702), and whether the surgery is for giant aneurysms (61703 for carotid; 61705 and 61708 for vertebrobasilar). Location and size drive code selection.

Question 9

Three surgeons form a surgical team to perform an exceptionally complex brain tumor resection involving simultaneous neurovascular, neurological, and reconstructive work. Which modifier indicates a surgical team was required?

  1. -62
  2. -80
  3. -66 (correct answer)
  4. -AS
Explanation: Modifier -66 (Surgical Team) is used when highly complex procedures require simultaneous work by two or more surgeons of different specialties working together as a team. Unlike modifier -62 (two surgeons performing distinct portions sequentially), modifier -66 reflects truly concurrent multi-specialty surgical teamwork.

Question 10

The operative report documents: "Exploration of the posterior fossa was performed; however, no definitive lesion was identified and no further procedure was completed." How many skull base surgery components would be reported?

  1. Three components: approach, definitive, and repair
  2. Two components: approach and repair
  3. One component: the approach procedure only (correct answer)
  4. No codes are reported when no definitive procedure is performed
Explanation: When only the approach procedure is performed and no definitive procedure or reconstruction is necessary, only the approach code is reported. Skull base surgery codes are reported by component, and components that are not performed are not coded. Reporting an approach-only scenario with just the approach code is correct.

Question 11

A patient undergoes an endoscopic approach for evacuation of an intraventricular hemorrhage. When an endoscopic approach is used for an intracranial procedure, how does this affect coding compared to an open craniotomy approach?

  1. The same code is used; the approach does not change code selection
  2. Modifier -52 is appended to the open craniotomy code to indicate a reduced service
  3. A separate, distinct CPT® code exists for the endoscopic approach (correct answer)
  4. An add-on code is appended to the craniotomy code for the endoscopic technique
Explanation: CPT® provides distinct codes for endoscopic intracranial procedures. For example, 62160–62165 cover neuroendoscopic procedures. Coders must not report the open craniotomy code with a modifier when a specific endoscopic code exists — the appropriate endoscopic code should be selected instead.

Question 12

A neurosurgeon performs a stereotactic biopsy of a deep brain lesion using CT guidance. Which CPT® code range is most appropriate for this procedure?

  1. 61105-61108
  2. 61510-61516
  3. 61720-61791
  4. 61140-61253 (correct answer)
Explanation: CPT® codes 61140-61253 include stereotactic procedures such as biopsy of intracranial lesions. Code 61750 covers stereotactic biopsy, aspiration, or excision of an intracranial lesion. The radiological guidance (CT or MRI) used in stereotactic procedures is included in the stereotactic code and is not reported separately.

Question 13

Two neurosurgeons of different specialties jointly perform a complex skull base tumor resection, each performing distinct portions of the procedure. Which modifier should each surgeon append to their respective procedure codes?

  1. -80
  2. -62 (correct answer)
  3. -66
  4. -AS
Explanation: Modifier -62 (Two Surgeons) is appended when two surgeons of different specialties each perform a distinct portion of a single procedure. Each surgeon reports the same procedure code with modifier -62 appended. This is common in skull base surgery where a neurosurgeon and ENT or maxillofacial surgeon collaborate.

Question 14

A patient returns to the operating room 10 days after a craniotomy for evacuation of a postoperative hematoma at the original surgical site. How is this re-operation typically handled for coding purposes?

  1. The original craniotomy code is reported again with no modifier
  2. The return to OR for hematoma evacuation during the global period is not separately reportable
  3. Modifier -78 is appended to the procedure code to indicate a return to the OR for a related complication (correct answer)
  4. Modifier -79 is appended because this is an unrelated procedure during the global period
Explanation: Modifier -78 (Unplanned Return to the Operating Room for a Related Procedure During the Postoperative Period) is reported when a patient returns to the OR for a complication related to the original surgery during the global period. Hematoma evacuation at the original site is a related complication, making -78 the correct modifier.

Question 15

A neurosurgeon performs a craniotomy for evacuation of a subdural hematoma. Which of the following statements correctly describes the relationship between the craniotomy approach and the evacuation procedure for coding purposes?

  1. The approach and evacuation are reported separately with two procedure codes
  2. The evacuation is included in the craniotomy code and is not reported separately (correct answer)
  3. Modifier -51 is added to the evacuation code when reported with the craniotomy
  4. An add-on code is used to report the evacuation in addition to the craniotomy
Explanation: In CPT® neurosurgery coding, the surgical approach (craniotomy) is typically bundled with the definitive procedure performed through that approach. The evacuation of the subdural hematoma is not reported separately from the craniotomy when performed through the same opening during the same operative session.

Question 16

A surgeon performs a percutaneous rhizotomy of the trigeminal nerve (Gasserian ganglion) for trigeminal neuralgia. In which CPT® code range is this procedure found?

  1. 61700-61711
  2. 61790-61791 (correct answer)
  3. 62270-62282
  4. 63600-63610
Explanation: CPT® codes 61790-61791 cover surgery on the Gasserian ganglion and its branches, including percutaneous procedures for trigeminal neuralgia. Code 61790 covers injection or destruction by neurolytic agent; 61791 covers section or differential section of sensory root. These are distinct from aneurysm (61700) or stereotactic (61720) codes.

Question 17

A neurosurgeon performs a craniotomy for arteriovenous malformation (AVM) resection. Which CPT® code range is specific to AVM surgery?

  1. 61680-61692 (correct answer)
  2. 61700-61711
  3. 61720-61735
  4. 61750-61791
Explanation: CPT® codes 61680-61692 cover surgery for arteriovenous malformations of the brain. Codes are differentiated by location (supratentorial vs. infratentorial) and complexity (simple vs. complex vs. dural). The 61700 range covers aneurysm surgery, not AVM resection.

Question 18

A neurosurgeon performs a stereotactic radiosurgery (SRS) treatment using a Gamma Knife for a single brain metastasis. Under which CPT® section are stereotactic radiosurgery codes found?

  1. Surgery — Nervous System (61796–61800)
  2. Radiology — Radiation Oncology (77371–77373) (correct answer)
  3. Medicine — Neurology (95990–95999)
  4. Surgery — Nervous System (63600–63615)
Explanation: Stereotactic radiosurgery is reported using radiation oncology codes 77371–77373 in the Radiology section. Code 77371 covers multi-source photon stereotactic radiosurgery (Gamma Knife); 77372 covers linear accelerator-based SRS. CPT® 61796 covers stereotactic radiosurgery for intracranial lesion but from the surgery section — both may be applicable depending on payer. Coders should verify with payer guidelines, but 77371–77373 is the radiation oncology primary range.

Question 19

A neurosurgeon drains a brain abscess via burr hole. When the same surgeon who created the burr hole also performs the drainage, how are these services reported?

  1. Two separate codes are reported: one for the burr hole and one for the drainage
  2. Only the drainage code is reported; the burr hole is the approach and is bundled (correct answer)
  3. Modifier -51 is added to the burr hole code when reported with the drainage
  4. The burr hole is reported as an add-on code to the drainage procedure
Explanation: The burr hole is the approach through which the drainage is performed. When both are performed by the same surgeon in the same operative session, the approach (burr hole) is considered bundled into the definitive procedure (drainage). Only the code for the definitive procedure — abscess drainage — is reported.

Question 20

Which of the following intracranial procedures is considered a separate procedure in CPT® and should only be reported when it is not part of a more comprehensive service?

  1. Craniotomy for tumor excision
  2. Burr hole for diagnostic purposes (correct answer)
  3. Cranioplasty
  4. Intracranial aneurysm clipping
Explanation: In CPT®, certain procedures are designated as "separate procedures" — they should only be reported independently when not performed as part of, or immediately related to, a more comprehensive procedure. Burr hole for diagnostic purposes can be designated as a separate procedure when it stands alone, but is bundled when it is the approach for a definitive intracranial procedure.