K04 — Diseases of pulp and periapical tissues
Not billable
Is K04 billable?
No — K04 is a non-billable header code. K04 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 12 billable codes beneath K04.
Billable codes under this header
- K04.1Necrosis of pulp
- K04.2Pulp degeneration
- K04.3Abnormal hard tissue formation in pulp
- K04.4Acute apical periodontitis of pulpal origin
- K04.5Chronic apical periodontitis
- K04.6Periapical abscess with sinus
- K04.7Periapical abscess without sinus
- K04.8Radicular cyst
- K04.01Reversible pulpitis
- K04.02Irreversible pulpitis
- K04.90Unspecified diseases of pulp and periapical tissues
- K04.99Other diseases of pulp and periapical tissues
K04 at a glance
| Code | K04 |
|---|---|
| Description | Diseases of pulp and periapical tissues |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes2 — not included here — inherited from Chapter 11
The conditions below are not part of K04, but a patient may have both at the same time. When documentation supports it, K04 and the excluded code may both be reported.
- 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)
What codes fall under K04? (10)
- K04.0Pulpitisnot billable
- K04.1Necrosis of pulp
- K04.2Pulp degeneration
- K04.3Abnormal hard tissue formation in pulp
- K04.4Acute apical periodontitis of pulpal origin
- K04.5Chronic apical periodontitis
- K04.6Periapical abscess with sinus
- K04.7Periapical abscess without sinus
- K04.8Radicular cyst
- K04.9Other and unspecified diseases of pulp and periapical tissuesnot billable
How long has K04 existed?
K04 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.