M18Arthrosis of first carpometacarpal joint
Code usage status
Primary diagnosis
Select a more specific code
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Do not use M18 directly
Use the most specific code supported by the record.
- Chapter XIII
- musculoskeletal system and connective tissue
- Group M00-M25
- Bệnh lý khớp
- Official Vietnamese name
- Thoái hóa khớp cổ tay - khớp gốc ngón tay cái
Related M18 codes
M18.0
Primary diagnosis candidate
Primary arthrosis of first carpometacarpal joints, bilateral
M18.1
Primary diagnosis candidate
Other primary arthrosis of first carpometacarpal joint
M18.2
Primary diagnosis candidate
Post-traumatic arthrosis of first carpometacarpal joints, bilateral
M18.3
Primary diagnosis candidate
Other post- traumatic arthrosis of first carpometacarpal joint
M18.4
Primary diagnosis candidate
Other secondary arthrosis of first carpometacarpal joints, bilateral
M18.5
Primary diagnosis candidate
Other secondary arthrosis of first carpometacarpal joint
M18.9
Primary diagnosis candidate
Arthrosis of first carpometacarpal joint, unspecified
Clinical record checklist
View coding guide →- Confirm that the code matches the final documented diagnosis.
- Use one primary-diagnosis code and record only relevant additional conditions.
- Review Ministry indicators, inclusions, exclusions and notes.
- Do not infer a diagnosis beyond the clinical record.
2026 regulatory basis
Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.
