K04
Diseases of pulp and periapical tissues
Non-billable headerNot valid on its own. Use one of the more specific codes under it.
K04 is a non-billable ICD-10-CM code category for diseases of pulp and periapical tissues. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are K04.0 Pulpitis, K04.1 Necrosis of pulp, K04.2 Pulp degeneration, K04.3 Abnormal hard tissue formation in pulp and 6 more. Its coding notes include 8 Excludes2 entries.
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)
More specific codes under K04 10
- K04.0PulpitisHeader
- K04.1Necrosis of pulpBillable
- K04.2Pulp degenerationBillable
- K04.3Abnormal hard tissue formation in pulpBillable
- K04.4Acute apical periodontitis of pulpal originBillable
- K04.5Chronic apical periodontitisBillable
- K04.6Periapical abscess with sinusBillable
- K04.7Periapical abscess without sinusBillable
- K04.8Radicular cystBillable
- K04.9Other and unspecified diseases of pulp and periapical tissuesHeader