K04 – Diseases of pulp and periapical tissues
ICD-10-CM 2027 diagnosis code · Diseases of oral cavity and salivary glands
ICD-10-CM code
K04
- Code
K04(claims format:K04)- Description
- Diseases of pulp and periapical tissues
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 11. Diseases of the digestive system (K00-K95)
- Block
- K00-K14 Diseases of oral cavity and salivary glands
Billable codes under K04
K04 is a header code and cannot be used on claims. Choose the most specific code:
- K04.0 – PulpitisHeader (more codes below)
- K04.1 – Necrosis of pulpBillable
- K04.2 – Pulp degenerationBillable
- K04.3 – Abnormal hard tissue formation in pulpBillable
- K04.4 – Acute apical periodontitis of pulpal originBillable
- K04.5 – Chronic apical periodontitisBillable
- K04.6 – Periapical abscess with sinusBillable
- K04.7 – Periapical abscess without sinusBillable
- K04.8 – Radicular cystBillable
- K04.9 – Other and unspecified diseases of pulp and periapical tissuesHeader (more codes below)
Frequently asked questions
What is ICD-10 code K04?
K04 is the ICD-10-CM code for diseases of pulp and periapical tissues, in the block K00-K14 (Diseases of oral cavity and salivary glands).
Is K04 a billable code?
No. K04 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.