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ICD-10-CM 2027 diagnosis code

K08.42Partial loss of teeth due to periodontal diseases

Not billable — use a more specific code

K08.42 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 K08.42

K08.42 is the ICD-10-CM diagnosis code for partial loss of teeth due to periodontal diseases. It belongs to category K08 (other disorders of teeth and supporting structures), 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.

Within K08.4 (partial loss of teeth), K08.42 is specifically for partial loss of teeth due to periodontal diseases. Related codes cover unspecified cause (K08.40), due to trauma (K08.41), due to caries (K08.43) and due to other specified cause (K08.49).

To report this condition, pick the subcode that matches the documentation: K08.421 (class I), K08.422 (class II), K08.423 (class III), K08.424 (class IV) and K08.429 (unspecified class).

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 K08.42

Notes that apply from higher levels

Instructions written at a parent level also apply to K08.42.

› From K08.4 Partial loss of teeth
Excludes1
  • complete loss of teeth (K08.1-)
  • congenital absence of teeth (K00.0)
Excludes2
  • exfoliation of teeth due to systemic causes (K08.0)
› From K08 Other disorders of teeth and supporting structures
Excludes2
  • dentofacial anomalies [including malocclusion] (M26.-)
  • disorders of jaw (M27.-)

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

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about K08.42

Is K08.42 billable?

No. K08.42 is a header code. Report one of its more specific subcodes instead.