ICD-10-CM 2027 diagnosis code
K04.0Pulpitis
K04.0 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.
Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About K04.0
K04.0 is the ICD-10-CM diagnosis code for pulpitis. It belongs to category K04 (diseases of pulp and periapical tissues), block K00-K14 (diseases of oral cavity and salivary glands) and chapter 11 (diseases of the digestive system). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.
Within K04 (diseases of pulp and periapical tissues), K04.0 is specifically for pulpitis. Related codes cover necrosis of pulp (K04.1), pulp degeneration (K04.2), abnormal hard tissue formation in pulp (K04.3), acute apical periodontitis of pulpal origin (K04.4), chronic apical periodontitis (K04.5), periapical abscess with sinus (K04.6), periapical abscess without sinus (K04.7), Radicular cyst (K04.8) and 1 more.
To report this condition, pick the subcode that matches the documentation: K04.01 (pulpitis) and K04.02 (pulpitis).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2017 (expanded into subcodes).
Specific codes under K04.0
Coding notes
- Acute pulpitis
- Chronic (hyperplastic) (ulcerative) pulpitis
Notes that apply from higher levels
Instructions written at a parent level also apply to K04.0.
Broader instructions also apply from Chapter 11: Diseases of the digestive system.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- FY2017 (effective 10/1/2016): Expanded — no longer billable
Common questions about K04.0
Is K04.0 billable?
- No. K04.0 is a header code. Report one of its more specific subcodes instead.