DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

P90 diagnosis code · Billable category · FY2027

P90 Convulsions of newborn

  • Billable
  • MCC
  • HCC 201
  • POA reported

P90 ICD-10 code: a billable diagnosis code in FY2027; the category has no subdivisions.

Where it sits

  1. Chapter 16 Certain conditions originating in the perinatal period (P00-P96)
  2. P90-P96 Other disorders originating in the perinatal period (P90-P96)
  3. P90 Convulsions of newborn
CC / MCC
MCC
MS-DRG
791, 793
HCC V28
201
POA
Reported
Code Editor
–
Index entries
6

Instructions

At P90

Excludes1

  • benign myoclonic epilepsy in infancy (G40.3-) G40.3
  • benign neonatal convulsions (familial) (G40.3-) G40.3

Notes that also apply

Chapter 16 instructions (Notes 1, Includes 1, Excludes2 5): printed on the chapter 16 page.

Index entries

  • Convulsions (idiopathic)infantile → P90
  • Convulsions (idiopathic)newborn → P90
  • Fitnewborn → P90
  • Newborn (infant) (liveborn) (singleton)convulsion → P90
  • Newborn (infant) (liveborn) (singleton)seizure → P90
  • Seizure(s)newborn → P90

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

Medicare grouping and edits

CMS files for P90
CC / MCCMCC
PDX exclusion list1468 (25 codes)
Appendix BMDC 15 Newborns and Other Neonates with Conditions Originating in Perinatal Period, MS-DRG 791 (Prematurity with Major Problems…); MDC 15 Newborns and Other Neonates with Conditions Originating in Perinatal Period, MS-DRG 793 (Full Term Neonate with Major Problems…)
Code Editor–
POAReported
HCC V28HCC 201 Seizure Disorders and Convulsions

MCC as a secondary diagnosis, not when the principal diagnosis is on its PDX exclusion list.

CMS: MS-DRG v44 (Appendix B, C), MCE v44, POA list FY2027, 2027 Initial ICD-10-CM Mappings. What the rows mean.

Hierarchy