DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

D43 Neoplasm of uncertain behavior of brain and central nervous system

  • Header · not billable

D43 is not billable. The category heads 7 billable codes in FY2027: the 7 codes directly below it.

Index → code

  • Subependymomaunspecified site → D43.2
  • Glioma (malignant)subependymal → D43.2
  • Astrocytoma (cystic)subependymal → D43.2

Where it sits

  1. Chapter 2 Neoplasms (C00-D49)
  2. D37-D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48)
  3. D43 Neoplasm of uncertain behavior of brain and central nervous system
Billable codes
7
Subdivisions
7
CC / MCC codes
0 / 0
HCC V28 codes
7
New FY2027
0
Index entries
10

Codes in D43

  1. D43.0
    Neoplasm of uncertain behavior of brain, supratentorial
    Billable23
    Inclusion terms 6, Excludes1 1

    Inclusion terms

    • Neoplasm of uncertain behavior of cerebral ventricle
    • Neoplasm of uncertain behavior of cerebrum
    • Neoplasm of uncertain behavior of frontal lobe
    • Neoplasm of uncertain behavior of occipital lobe
    • Neoplasm of uncertain behavior of parietal lobe
    • Neoplasm of uncertain behavior of temporal lobe

    Excludes1

    • neoplasm of uncertain behavior of fourth ventricle (D43.1) D43.1
  2. D43.1
    Neoplasm of uncertain behavior of brain, infratentorial
    Billable23
    Inclusion terms 3

    Inclusion terms

    • Neoplasm of uncertain behavior of brain stem
    • Neoplasm of uncertain behavior of cerebellum
    • Neoplasm of uncertain behavior of fourth ventricle
  3. D43.2
    Neoplasm of uncertain behavior of brain, unspecified
    Billable23
  4. D43.3
    Neoplasm of uncertain behavior of cranial nerves
    Billable23
  5. D43.4
    Neoplasm of uncertain behavior of spinal cord
    Billable23
  6. D43.8
    Neoplasm of uncertain behavior of other specified parts of central nervous system
    Billable23
  7. D43.9
    Neoplasm of uncertain behavior of central nervous system, unspecified
    Billable23
    Inclusion terms 1

    Inclusion terms

    • Neoplasm of uncertain behavior of nervous system (central) NOS

Sources of each column.

Instructions

At D43

Excludes1

  • neoplasm of uncertain behavior of peripheral nerves and autonomic nervous system (D48.2) D48.2

Notes that also apply

Block D37-D48 instructions (Notes 1, Excludes1 1): printed on the block page.

Chapter 2 instructions (Notes 8): printed on the chapter 2 page.

Index entries

  • Astrocytoma (cystic)subependymal → D43.2
  • Ependymoma (epithelial) (malignant)myxopapillary → D43.2
  • Ependymoma (epithelial) (malignant)papillary → D43.2
  • Glioma (malignant)subependymal → D43.2
  • Subependymomaunspecified site → D43.2
  • Astrocytoma (cystic)subependymalunspecified site → D43.2
  • Ependymoma (epithelial) (malignant)myxopapillaryunspecified site → D43.2
  • Ependymoma (epithelial) (malignant)papillaryunspecified site → D43.2
  • Glioma (malignant)subependymalunspecified site → D43.2
  • Astrocytoma (cystic)subependymalgiant cellunspecified site → D43.2

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy