00K Map - Central Nervous System and Cranial Nerves ICD-10-PCS
The 00K code range contains 26 ICD-10-PCS codes for Map procedures on the central nervous system and cranial nerves. 25 of the codes are billable and valid for inpatient claim submission in fiscal year 2026.
Root Operation Definition
Map: Locating the route of passage of electrical impulses and/or locating functional areas in a body part.
Codes in the 00K Range 26 codes · 25 billable
- 00K Central Nervous System and Cranial Nerves, MapNon-billable header
- 00K00ZZ Map Brain, Open Approach
- 00K03ZZ Map Brain, Percutaneous Approach
- 00K04ZZ Map Brain, Percutaneous Endoscopic Approach
- 00K0XZ1 Map Brain using Connectomic Analysis, External Approach New
- 00K70ZZ Map Cerebral Hemisphere, Open Approach
- 00K73ZZ Map Cerebral Hemisphere, Percutaneous Approach
- 00K74ZZ Map Cerebral Hemisphere, Percutaneous Endoscopic Approach
- 00K80ZZ Map Basal Ganglia, Open Approach
- 00K83ZZ Map Basal Ganglia, Percutaneous Approach
- 00K84ZZ Map Basal Ganglia, Percutaneous Endoscopic Approach
- 00K90ZZ Map Thalamus, Open Approach
- 00K93ZZ Map Thalamus, Percutaneous Approach
- 00K94ZZ Map Thalamus, Percutaneous Endoscopic Approach
- 00KA0ZZ Map Hypothalamus, Open Approach
- 00KA3ZZ Map Hypothalamus, Percutaneous Approach
- 00KA4ZZ Map Hypothalamus, Percutaneous Endoscopic Approach
- 00KB0ZZ Map Pons, Open Approach
- 00KB3ZZ Map Pons, Percutaneous Approach
- 00KB4ZZ Map Pons, Percutaneous Endoscopic Approach
- 00KC0ZZ Map Cerebellum, Open Approach
- 00KC3ZZ Map Cerebellum, Percutaneous Approach
- 00KC4ZZ Map Cerebellum, Percutaneous Endoscopic Approach
- 00KD0ZZ Map Medulla Oblongata, Open Approach
- 00KD3ZZ Map Medulla Oblongata, Percutaneous Approach
- 00KD4ZZ Map Medulla Oblongata, Percutaneous Endoscopic Approach
About the 00K Code Range
The ICD-10-PCS root operation Map (code 00K) refers to the process of identifying the functional areas, pathways, or neural networks within the central nervous system and cranial nerves. It is used to create detailed representations of brain structures without performing resection or destruction.
This Medical and Surgical operation focuses on mapping specific brain regions such as the cerebral hemisphere, basal ganglia, thalamus, hypothalamus, pons, cerebellum, and medulla oblongata. The procedure can be performed through various approaches including open, percutaneous, percutaneous endoscopic, and even an external approach using connectomic analysis. For example, code 00K00ZZ denotes an open approach to map the brain, whereas 00K04ZZ indicates a percutaneous endoscopic mapping of the brain. Accurate coding of these procedures is essential for documenting advanced functional brain assessments used in surgical planning or neurological evaluation.
Questions About This Page
How many billable codes are in the 00K range?
Of the 26 codes in this range, 25 are billable and valid for inpatient claim submission from October 1, 2025 through September 30, 2026. Table header codes group them but cannot be reported on claims.
What does the 00K range classify?
The range classifies Map procedures, locating the route of passage of electrical impulses and/or locating functional areas in a body part, performed on the central nervous system and cranial nerves. Each code adds the body part, approach, device, and qualifier in characters four through seven, and links to its own reference page.
Related References
Source: CMS FY 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
