H49.4Progressive external ophthalmoplegia
Code usage status
Primary diagnosis
May be used as the primary diagnosis
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Complete code in the classification
Use when the diagnosis matches and no exclusion applies.
- Chapter VII
- Diseases of the eye and adnexa
- Official Vietnamese name
- Liệt vận nhãn ngoài tiến triển
Related H49 codes
H49
Paralytic strabismus
H49.0
Primary diagnosis candidate
Third [oculomotor] nerve palsy
H49.1
Primary diagnosis candidate
Fourth [trochlear] nerve palsy
H49.2
Primary diagnosis candidate
Sixth [abducent] nerve palsy
H49.3
Primary diagnosis candidate
Total (external) ophthalmoplegia
H49.8
Primary diagnosis candidate
Other paralytic strabismus
H49.9
Primary diagnosis candidate
Paralytic strabismus, 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.
