K08.421
✓ Billable
Partial loss of teeth due to periodontal diseases, class I
ICD-10-CM · FY2026 · Diseases of the Digestive System
Code
K08.421
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Digestive System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code K08.421?
ICD-10-CM code K08.421 represents Partial loss of teeth due to periodontal diseases, class I. It is a billable diagnosis code in the Diseases of the Digestive System chapter, effective October 1, 2025 – September 30, 2026.
Is K08.421 billable?
Yes. K08.421 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is K08.421 in?
K08.421 belongs to the Diseases of the Digestive System chapter (K00–K95) of ICD-10-CM.
Related codes in the K08 category
K08
Other disorders of teeth and supporting structures
Non-billable
K08.0
Exfoliation of teeth due to systemic causes
Billable
K08.1
Complete loss of teeth
Non-billable
K08.2
Atrophy of edentulous alveolar ridge
Non-billable
K08.3
Retained dental root
Billable
K08.4
Partial loss of teeth
Non-billable
K08.5
Unsatisfactory restoration of tooth
Non-billable
K08.8
Other specified disorders of teeth and supporting structures
Non-billable
Search all 98,186 ICD-10-CM codes instantly
Search ICDwise →