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K04.5 ICD-10-CA code: Chronic apical periodontitis

K04.5 is the ICD-10-CA code for “Chronic apical periodontitis” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

K04.5

Chronic apical periodontitis

ICD-10-CA · Canada · Also written K045

Index terms

Entries in CIHI’s alphabetical index that lead to K04.5. Searching the index by the condition the note names is how coders reach this code.

  • Granuloma, apical
  • Granuloma, dental
  • Granuloma, periapical
  • Infection, infected (opportunistic), periapical
  • Periodontitis (chronic) (complex) (simplex), apical
  • Granuloma, pyogenic, pyogenicum (of) (skin), maxillary alveolar ridge

Notes for K04.5

As CIHI prints them, with any note K04.5 takes from the headings above it.

Includes

  • Apical:• or periapical granuloma• periodontitis NOS

Excludes

Conditions classified elsewhere.

  • Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)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)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 11: Diseases of the digestive system (K00-K93)

Where K04.5 sits

  1. 1ChapterChapter 11: Diseases of the digestive system (K00-K93)
  2. 2Block K00-K14Diseases of oral cavity, salivary glands and jaws
  3. 3Category K04Diseases of pulp and periapical tissues
  4. 4Valid code K04.5Chronic apical periodontitis

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 K04.5 in the CIHI source

Frequently asked questions

What does ICD-10-CA code K04.5 mean?

K04.5 is the ICD-10-CA code for “Chronic apical periodontitis” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is K04.5 in ICD-10-CA?

K04.5 sits under K04 Diseases of pulp and periapical tissues, within K00-K14 Diseases of oral cavity, salivary glands and jaws, within Chapter 11: Diseases of the digestive system (K00-K93).

What coding notes apply to K04.5?

ICD-10-CA lists Includes, Excludes notes for K04.5, 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 K04.5

K04.0PulpitisK04.1Necrosis of pulpK04.2Pulp degenerationK04.3Abnormal hard tissue formation in pulpK04.4Acute apical periodontitis of pulpal originK04.6Periapical abscess with sinusK04.7Periapical abscess without sinusK04.8Radicular cystK04.9Other and unspecified diseases of pulp and periapical tissues