H33.1Retinoschisis and retinal cysts
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
- Group H30-H36
- Disorders of choroid and retina
- Official Vietnamese name
- Tách lớp võng mạc và/hoặc nang võng mạc
- Additional WHO coding guidance
- Cyst of ora serrata Parasitic cyst of retina NOS Pseudocyst of retina Excl.: congenital retinoschisis (Q14.1) microcystoid degeneration of retina (H35.4)
Related H33 codes
H33
Retinal detachments and breaks
H33.0
Primary diagnosis candidate
Retinal detachment with retinal break
H33.2
Primary diagnosis candidate
Serous retinal detachment
H33.3
Primary diagnosis candidate
Retinal breaks without detachment
H33.4
Primary diagnosis candidate
Traction detachment of retina
H33.5
Primary diagnosis candidate
Other retinal detachments
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.
