K08.20 Unspecified atrophy of edentulous alveolar ridge

Billable ICD-10-CM code, FY2026.

Applicable to

• Atrophy of the mandible NOS
• Atrophy of the maxilla NOS

Applies from K08 Other disorders of teeth and supporting structures

Excludes2 (not included here)

• dentofacial anomalies [including malocclusion] (M26.-)
• disorders of jaw (M27.-)

MS-DRG index

Defines the logic of DRG(s) 011-013 in MDC PRE.

Approximate ICD-9-CM (GEMs)

• 525.20 Unspecified atrophy of edentulous alveolar ridge

Code annotations containing back-references to K08.20

Back-references to K08.2

• Type 2 Excludes: K06 Other disorders of gingiva and edentulous alveolar ridge ("atrophy of edentulous alveolar ridge (K08.2)")

Diagnosis Index entries for K08.20

• Atrophy, atrophic (of) › alveolar process or ridge (edentulous)
• Atrophy, atrophic (of) › edentulous alveolar ridge
• Atrophy, atrophic (of) › mandible (edentulous)
• Atrophy, atrophic (of) › maxilla

Nearby codes

• 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 (this code)
• 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