DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

R56 Convulsions, not elsewhere classified

  • Header · not billable

R56 is not billable. The category heads 4 billable codes in FY2027, grouped under 3 subdivisions.

Index → code

Where it sits

  1. Chapter 18 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
  2. R50-R69 General symptoms and signs (R50-R69)
  3. R56 Convulsions, not elsewhere classified
Billable codes
4
Subdivisions
3
CC / MCC codes
3 / 0
HCC V28 codes
4
New FY2027
0
Index entries
12

Codes in R56

  1. R56.0
    Febrile convulsions
    Header
  2. R56.00
    Simple febrile convulsions
    BillableCC201
    Inclusion terms 2

    Inclusion terms

    • Febrile convulsion NOS
    • Febrile seizure NOS
  3. R56.01
    Complex febrile convulsions
    BillableCC201
    Inclusion terms 3, Excludes1 1

    Inclusion terms

    • Atypical febrile seizure
    • Complex febrile seizure
    • Complicated febrile seizure

    Excludes1

    • status epilepticus (G40.901) G40.901
  4. R56.1
    Post traumatic seizures
    BillableCC201
    Excludes1 1

    Excludes1

    • post traumatic epilepsy (G40.-) G40
  5. R56.9
    Unspecified convulsions
    Billable201
    Inclusion terms 4

    Inclusion terms

    • Convulsion disorder
    • Fit NOS
    • Recurrent convulsions
    • Seizure(s) (convulsive) NOS

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

At R56

Excludes1

  • dissociative convulsions and seizures (F44.5) F44.5
  • epileptic convulsions and seizures (G40.-) G40
  • newborn convulsions and seizures (P90) P90

Notes that also apply

Chapter 18 instructions (Notes 9, Excludes2 4): printed on the chapter 18 page.

Index entries

  • Convulsions (idiopathic) → R56.9
  • Fit → R56.9
  • Seizure(s) → R56.9
  • Convulsions (idiopathic)febrile → R56.00
  • Seizure(s)febrile (simple) → R56.00
  • Convulsions (idiopathic)post traumatic → R56.1
  • Seizure(s)post traumatic → R56.1
  • Convulsions (idiopathic)recurrent → R56.9
  • Disorder (of)paroxysmal, mixed → R56.9
  • Convulsions (idiopathic)febrilesimple → R56.00
  • Convulsions (idiopathic)febrilecomplex → R56.01
  • Seizure(s)febrile (simple)complex (atypical) (complicated) → R56.01

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

Hierarchy