ICD-10-CM 2027 diagnosis code

K02Dental caries

Not billable — use a more specific code

K02 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About K02

K02 is the ICD-10-CM diagnosis code for dental caries. It belongs to 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 5 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: K02.3 (caries), K02.5 (on pit and fissure surface), K02.6 (on smooth surface), K02.7 (caries) and K02.9 (unspecified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under K02

Coding notes

IncludesFurther defines the content of the category

caries of dentine
dental cavities
early childhood caries
pre-eruptive caries
recurrent caries (dentino enamel junction) (enamel) (to the pulp)
tooth decay

Notes that apply from higher levels

Instructions written at a parent level also apply to K02.

Broader instructions also apply from Chapter 11: Diseases of the digestive system.

Codes whose notes reference K02

K03Excludes2

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)
No changes since FY2016.

Common questions about K02

Is K02 billable?: No. K02 is a header code. Report one of its more specific subcodes instead.