K04.5
Chronic apical periodontitis
BillableComplete code, valid to report
K04.5 (also written K045) is a billable ICD-10-CM diagnosis code for chronic apical periodontitis. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 12 codes in category K04 (Diseases of pulp and periapical tissues). The Alphabetic Index lists it under 6 entries. Its coding notes include 1 Excludes1 entry and 8 Excludes2 entries.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
This code
- chronic periodontitis (K05.3-)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
Inherited from Chapter 11 Diseases of the digestive system
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Inclusion terms
Conditions classified to this code.
This code
- Apical or periapical granuloma
- Apical periodontitis NOS
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 6 entries