Neoplasm of uncertain behavior of brain and central nervous system (D43) ICD-10-CM
The D43 code range covers neoplasm of uncertain behavior of brain and central nervous system with 8 ICD-10-CM diagnosis codes. 7 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- neoplasm of uncertain behavior of peripheral nerves and autonomic nervous system D48.2
Codes in the D43 Range 8 codes · 7 billable
- D43 Neoplasm of uncertain behavior of brain and central nervous systemNon-billable
- D43.0 Neoplasm of uncertain behavior of brain, supratentorial
- D43.1 Neoplasm of uncertain behavior of brain, infratentorial
- D43.2 Neoplasm of uncertain behavior of brain, unspecified
- D43.3 Neoplasm of uncertain behavior of cranial nerves
- D43.4 Neoplasm of uncertain behavior of spinal cord
- D43.8 Neoplasm of uncertain behavior of other specified parts of central nervous system
- D43.9 Neoplasm of uncertain behavior of central nervous system, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the D43 range.
Central Nervous System Neoplasm
A benign or malignant, primary or metastatic neoplasm that affects the brain, meninges, or spinal cord. Representative examples of primary neoplasms include astrocytoma, oligodendroglioma, ependymoma, and meningioma. Representative examples of metastatic neoplasms include carcinoma and leukemia.
Cranial Nerve Neoplasm
A benign or malignant neoplasm that affects a cranial nerve.
Infratentorial Neoplasm
A benign or malignant neoplasm that occurs in brain parenchymal tissue below the tentorium cerebelli.
Spinal Cord Neoplasm
A primary or metastatic neoplasm affecting the spinal cord.
Supratentorial Neoplasm
A benign or malignant neoplasm that occurs within the intracranial cavity above the tentorium cerebelli.
About the D43 Code Range
These are growths of uncertain behavior in the brain, cranial nerves, spinal cord, or other parts of the central nervous system.
Brain codes distinguish two named regions, D43.0 and D43.1, from an unspecified brain location, D43.2. The remaining subdivisions identify cranial nerves, D43.3; the spinal cord, D43.4; other specified central nervous system parts, D43.8; or an unspecified part, D43.9.
Questions About This Page
How many billable codes are in the D43 range?
Of the 8 codes in this range, 7 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the D43 range classify?
The range classifies neoplasm of uncertain behavior of brain and central nervous system. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
