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P23.1 ICD-10-CA code: Congenital pneumonia due to Chlamydia

P23.1 is the ICD-10-CA code for “Congenital pneumonia due to Chlamydia” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

P23.1

Congenital pneumonia due to Chlamydia

ICD-10-CA · Canada · Also written P231

Index terms

Entries in CIHI’s alphabetical index that lead to P23.1. Searching the index by the condition the note names is how coders reach this code.

  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved), chlamydial, congenital
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved), in (due to), Chlamydia, neonatal
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved), congenital (infective), due to, Chlamydia
  • Condition, conditions (arising in the perinatal period), pneumonia (acute) (community acquired) (double) (hemorrhagic) (lobe) (migratory) (nosocomial) (primary) (purulent) (septic) (unresolved), chlamydial, congenital
  • Condition, conditions (arising in the perinatal period), pneumonia (acute) (community acquired) (double) (hemorrhagic) (lobe) (migratory) (nosocomial) (primary) (purulent) (septic) (unresolved), in (due to), Chlamydia, neonatal
  • Condition, conditions (arising in the perinatal period), pneumonia (acute) (community acquired) (double) (hemorrhagic) (lobe) (migratory) (nosocomial) (primary) (purulent) (septic) (unresolved), congenital (infective), due to, Chlamydia

Notes for P23.1

As CIHI prints them, with any note P23.1 takes from the headings above it.

Includes

  • Infective pneumonia acquired in utero or during birthFrom P23 Congenital pneumonia
  • Conditions that have their origin in the perinatal period even though death or morbidity occurs laterFrom Chapter 16: Certain conditions originating in the perinatal period (P00-P96)

Excludes

Conditions classified elsewhere.

  • Neonatal pneumonia resulting from aspiration (P24.-)From P23 Congenital pneumonia
  • Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)tetanus neonatorum (A33)whooping cough (A37.-)From Chapter 16: Certain conditions originating in the perinatal period (P00-P96)

Where P23.1 sits

  1. 1ChapterChapter 16: Certain conditions originating in the perinatal period (P00-P96)
  2. 2Block P20-P29Respiratory and cardiovascular disorders specific to the perinatal period
  3. 3Category P23Congenital pneumonia
  4. 4Valid code P23.1Congenital pneumonia due to Chlamydia

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See P23.1 in the CIHI source

Frequently asked questions

What does ICD-10-CA code P23.1 mean?

P23.1 is the ICD-10-CA code for “Congenital pneumonia due to Chlamydia” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is P23.1 in ICD-10-CA?

P23.1 sits under P23 Congenital pneumonia, within P20-P29 Respiratory and cardiovascular disorders specific to the perinatal period, within Chapter 16: Certain conditions originating in the perinatal period (P00-P96).

What coding notes apply to P23.1?

ICD-10-CA lists Includes, Excludes notes for P23.1, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside P23.1

P23.0Congenital pneumonia due to viral agentP23.2Congenital pneumonia due to staphylococcusP23.3Congenital pneumonia due to streptococcus, group BP23.4Congenital pneumonia due to Escherichia coliP23.5Congenital pneumonia due to PseudomonasP23.6Congenital pneumonia due to other bacterial agentsP23.8Congenital pneumonia due to other organismsP23.9Congenital pneumonia, unspecified