Chapter 11

K00–K95: Diseases of the Digestive System

Diseases of the Digestive System diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)

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)

All Codes Billable Only

Internal Codes

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K06.1|
Gingival enlargement
K06.2|
Gingival and edentulous alveolar ridge lesions associated with trauma
K06.3|
Horizontal alveolar bone loss
K06.8|
Other specified disorders of gingiva and edentulous alveolar ridge
K06.9|
Disorder of gingiva and edentulous alveolar ridge, unspecified
K08|
Other disorders of teeth and supporting structures
K08.0|
Exfoliation of teeth due to systemic causes
K08.1|
Complete loss of teeth
K08.10|
Complete loss of teeth, unspecified cause
K08.101|
Complete loss of teeth, unspecified cause, class I
K08.102|
Complete loss of teeth, unspecified cause, class II
K08.103|
Complete loss of teeth, unspecified cause, class III
K08.104|
Complete loss of teeth, unspecified cause, class IV
K08.109|
Complete loss of teeth, unspecified cause, unspecified class
K08.11|
Complete loss of teeth due to trauma
K08.111|
Complete loss of teeth due to trauma, class I
K08.112|
Complete loss of teeth due to trauma, class II
K08.113|
Complete loss of teeth due to trauma, class III
K08.114|
Complete loss of teeth due to trauma, class IV
K08.119|
Complete loss of teeth due to trauma, unspecified class
K08.12|
Complete loss of teeth due to periodontal diseases
K08.121|
Complete loss of teeth due to periodontal diseases, class I
K08.122|
Complete loss of teeth due to periodontal diseases, class II
K08.123|
Complete loss of teeth due to periodontal diseases, class III
K08.124|
Complete loss of teeth due to periodontal diseases, class IV
K08.129|
Complete loss of teeth due to periodontal diseases, unspecified class
K08.13|
Complete loss of teeth due to caries
K08.131|
Complete loss of teeth due to caries, class I
K08.132|
Complete loss of teeth due to caries, class II
K08.133|
Complete loss of teeth due to caries, class III
K08.134|
Complete loss of teeth due to caries, class IV
K08.139|
Complete loss of teeth due to caries, unspecified class
K08.19|
Complete loss of teeth due to other specified cause
K08.191|
Complete loss of teeth due to other specified cause, class I
K08.192|
Complete loss of teeth due to other specified cause, class II
K08.193|
Complete loss of teeth due to other specified cause, class III
K08.194|
Complete loss of teeth due to other specified cause, class IV
K08.199|
Complete loss of teeth due to other specified cause, unspecified class
K08.2|
Atrophy of edentulous alveolar ridge
K08.20|
Unspecified atrophy of edentulous alveolar ridge
K08.21|
Minimal atrophy of the mandible
K08.22|
Moderate atrophy of the mandible
K08.23|
Severe atrophy of the mandible
K08.24|
Minimal atrophy of maxilla
K08.25|
Moderate atrophy of the maxilla
K08.26|
Severe atrophy of the maxilla
K08.3|
Retained dental root
K08.4|
Partial loss of teeth
K08.40|
Partial loss of teeth, unspecified cause
K08.401|
Partial loss of teeth, unspecified cause, class I

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