DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

P23 Congenital pneumonia

  • Header · not billable

P23 is not billable. The category heads 9 billable codes in FY2027: the 9 codes directly below it.

Index → code

  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)neonatal → P23.9
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective) → P23.9
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)chlamydialcongenital → P23.1

Where it sits

  1. Chapter 16 Certain conditions originating in the perinatal period (P00-P96)
  2. P19-P29 Respiratory and cardiovascular disorders specific to the perinatal period (P19-P29)
  3. P23 Congenital pneumonia
Billable codes
9
Subdivisions
9
CC / MCC codes
0 / 9
HCC V28 codes
0
New FY2027
0
Index entries
18

Codes in P23

  1. P23.0
    Congenital pneumonia due to viral agent
    BillableMCC
    Excludes1 1, Use additional code 1

    Excludes1

    • congenital rubella pneumonitis (P35.0) P35.0

    Use additional code

    • code (B97) to identify organism B97
  2. P23.1
    Congenital pneumonia due to Chlamydia
    BillableMCC
  3. P23.2
    Congenital pneumonia due to staphylococcus
    BillableMCC
  4. P23.3
    Congenital pneumonia due to streptococcus, group B
    BillableMCC
  5. P23.4
    Congenital pneumonia due to Escherichia coli
    BillableMCC
  6. P23.5
    Congenital pneumonia due to Pseudomonas
    BillableMCC
  7. P23.6
    Congenital pneumonia due to other bacterial agents
    BillableMCC
    Inclusion terms 4, Use additional code 1

    Inclusion terms

    • Congenital pneumonia due to Hemophilus influenzae
    • Congenital pneumonia due to Klebsiella pneumoniae
    • Congenital pneumonia due to Mycoplasma
    • Congenital pneumonia due to Streptococcus, except group B

    Use additional code

    • code (B95-B96) to identify organism B95 B96
  8. P23.8
    Congenital pneumonia due to other organisms
    BillableMCC
  9. P23.9
    Congenital pneumonia, unspecified
    BillableMCC

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 P23

Includes

  • infective pneumonia acquired in utero or during birth

Excludes1

  • neonatal pneumonia resulting from aspiration (P24.-) P24

Notes that also apply

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

Index entries

  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective) → P23.9
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)neonatal → P23.9
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)viral, virus (broncho) (interstitial) (lobar)congenital → P23.0
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)chlamydialcongenital → P23.1
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective)specified NEC → P23.8
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective)due toviral agent → P23.0
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective)due toChlamydia → P23.1
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)in (due to)Chlamydianeonatal → P23.1
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective)due toStaphylococcus → P23.2
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective)due toEscherichia coli → P23.4
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective)due toPseudomonas → P23.5
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective)due tobacterium NEC → P23.6
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective)due toHaemophilus influenzae → P23.6
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective)due toKlebsiella pneumoniae → P23.6
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective)due toMycoplasma → P23.6
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective)due toStreptococcus (except group B) → P23.6
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective)due toinfective organism NEC → P23.8
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved)congenital (infective)due toStreptococcus (except group B)group B → P23.3

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

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