DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

G32 Other degenerative disorders of nervous system in diseases classified elsewhere

  • Header · not billable

G32 is not billable. The category heads 3 billable codes in FY2027, grouped under 2 subdivisions.

Index → code

  • Encephalopathy (acute)degenerative, in specified disease NEC → G32.89
  • Ataxia, ataxy, ataxiccerebellar (hereditary)inspecified disease NEC → G32.81

Where it sits

  1. Chapter 6 Diseases of the nervous system (G00-G99)
  2. G30-G32 Other degenerative diseases of the nervous system (G30-G32)
  3. G32 Other degenerative disorders of nervous system in diseases classified elsewhere
Billable codes
3
Subdivisions
2
CC / MCC codes
2 / 0
HCC V28 codes
2
New FY2027
0
Index entries
22

Codes in G32

  1. G32.0
    Subacute combined degeneration of spinal cord in diseases classified elsewhere
    BillableCC182
    Inclusion terms 2, Excludes1 1, Code first 5

    Inclusion terms

    • Dana-Putnam syndrome
    • Sclerosis of spinal cord (combined) (dorsolateral) (posterolateral)

    Excludes1

    • syphilitic combined degeneration of spinal cord (A52.11) A52.11

    Code first

    • underlying disease, such as:
    • other dietary vitamin B12 deficiency anemia (D51.3) D51.3
    • vitamin B12 deficiency anemia due to intrinsic factor deficiency (D51.0) D51.0
    • vitamin B12 deficiency anemia, unspecified (D51.8) D51.8
    • vitamin B12 deficiency (E53.8) E53.8
  2. G32.8
    Other specified degenerative disorders of nervous system in diseases classified elsewhere
    Header
    Excludes1 1, Code first 5

    Excludes1

    • superior hemorrhagic polioencephalitis [Wernicke's encephalopathy] (E51.2) E51.2

    Code first

    • underlying disease, such as:
    • amyloidosis cerebral degeneration (E85.-) E85
    • cerebral degeneration (due to) hypothyroidism (E00.0-E03.9) E00.0 E03.9
    • cerebral degeneration (due to) neoplasm (C00-D49) C00 D49
    • cerebral degeneration (due to) vitamin B deficiency, except thiamine (E52-E53.-) E52 E53
  3. G32.81
    Cerebellar ataxia in diseases classified elsewhere
    BillableCC182
    Excludes1 2, Code first 4

    Excludes1

    • systemic atrophy primarily affecting the central nervous system in alcoholic cerebellar ataxia (G31.2) G31.2
    • systemic atrophy primarily affecting the central nervous system in myxedema (G13.2) G13.2

    Code first

    • underlying disease, such as:
    • celiac disease (with gluten ataxia) (K90.0) K90.0
    • cerebellar ataxia (in) neoplastic disease (paraneoplastic cerebellar degeneration) (C00-D49) C00 D49
    • non-celiac gluten ataxia (M35.9) M35.9
  4. G32.89
    Other specified degenerative disorders of nervous system in diseases classified elsewhere
    Billable
    Inclusion terms 1

    Inclusion terms

    • Degenerative encephalopathy in diseases classified elsewhere

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

Notes that also apply

Chapter 6 instructions (Excludes2 8): printed on the chapter 6 page.

Index entries

  • Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)combined system disease NEC → D51.0 [G32.0]
  • Encephalopathy (acute)pellagrous → E52 [G32.89]
  • Degeneration, degenerativecombined (spinal cord) (subacute) → E53.8 [G32.0]
  • Myelopathy (spinal cord)vitamin B12 → E53.8 [G32.0]
  • Encephalopathy (acute)vitamin B deficiency NEC → E53.9 [G32.89]
  • Encephalopathy (acute)degenerative, in specified disease NEC → G32.89
  • Ataxia, ataxy, ataxicgluten → M35.9 [G32.81]
  • Degeneration, degenerativecombined (spinal cord) (subacute)with anemia (pernicious) → D51.0 [G32.0]
  • Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)combined system disease NECdue to dietary vitamin B12 deficiency → D51.3 [G32.0]
  • Encephalopathy (acute)in (due to) (with)lack of vitamin → E56.9 [G32.89]
  • Degeneration, degenerativespinal (cord)amyloid → E85.4 [G32.89]
  • Ataxia, ataxy, ataxicglutenwith celiac disease → K90.0 [G32.81]
  • Degeneration, degenerativebrain (cortical) (progressive)inneoplastic disease → D49.6 [G32.89]
  • Ataxia, ataxy, ataxiccerebellar (hereditary)inneoplastic disease → D49.9 [G32.81]
  • Degeneration, degenerativecombined (spinal cord) (subacute)with anemia (pernicious)due to dietary vitamin B12 deficiency → D51.3 [G32.0]
  • Degeneration, degenerativebrain (cortical) (progressive)inmyxedema → E03.9 [G32.89]
  • Degeneration, degenerativebrain (cortical) (progressive)invitamin B12 deficiency → E53.8 [G32.89]
  • Degeneration, degenerativecombined (spinal cord) (subacute)in (due to)vitamin B12 deficiency → E53.8 [G32.0]
  • Degeneration, degenerativebrain (cortical) (progressive)inNiemann-Pick disease → E75.249 [G32.89]
  • Degeneration, degenerativebrain (cortical) (progressive)insphingolipidosis → E75.3 [G32.89]
  • Ataxia, ataxy, ataxiccerebellar (hereditary)inspecified disease NEC → G32.81
  • Degeneration, degenerativecombined (spinal cord) (subacute)in (due to)vitamin B12 deficiencyanemia → D51.9 [G32.0]

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

Hierarchy