K08.51 Open restoration margins of tooth

Billable ICD-10-CM code, FY2026.

Applicable to

• Dental restoration failure of marginal integrity
• Open margin on tooth restoration
• Poor gingival margin to tooth restoration

Applies from K08 Other disorders of teeth and supporting structures

Excludes2 (not included here)

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

Applies from K08.5 Unsatisfactory restoration of tooth

Applicable to

• Defective bridge, crown, filling
• Defective dental restoration

Excludes1 (never code together)

• dental restoration status (Z98.811)

Excludes2 (not included here)

• endosseous dental implant failure (M27.6-)
• unsatisfactory endodontic treatment (M27.5-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 525.61 Open restoration margins

Diagnosis Index entries for K08.51

• Dental › restoration › failure of marginal integrity
• Open, opening › margin on tooth restoration
• Open, opening › restoration margins of tooth
• Poor › gingival margin to tooth restoration
• Restoration (of) › dental › failure of marginal integrity
• Restoration (of) › tooth (existing) › open margins
• Restoration (of) › tooth (existing) › poor gingival margins

Nearby codes

• K08.493 Partial loss of teeth due to other specified cause, class III
• K08.494 Partial loss of teeth due to other specified cause, class IV
• K08.499 Partial loss of teeth due to other specified cause, unspecified class
• K08.5 Unsatisfactory restoration of tooth
• K08.50 Unsatisfactory restoration of tooth, unspecified
• K08.51 Open restoration margins of tooth (this code)
• K08.52 Unrepairable overhanging of dental restorative materials
• K08.53 Fractured dental restorative material
• K08.530 Fractured dental restorative material without loss of material
• K08.531 Fractured dental restorative material with loss of material
• K08.539 Fractured dental restorative material, unspecified